Most Common Car Issues

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Engine Model
LQ4
Make
HUMMER

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MOST COMMON PROBLEMS

HUMMER H2 2003

The 2003 HUMMER H2 is a robust SUV known for its powerful 6.0-liter V8 engine, produced by GM. This 4WD vehicle is designed for versatility and off-road capability, making it a popular choice among those needing both performance and durability. Built in Mishawaka, Indiana by AM General, the H2 is part of the 3/4 Ton series and offers a classic, rugged style. With its gasoline-fueled engine and spacious four-door design, it comfortably caters to adventurous drivers and families alike.

Spec:

Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8

Problems:

Oil consumption
The LQ4 engine in the 2003 Hummer H2 is known to have higher oil consumption, which can be due to worn piston rings or valve seals.
Intake manifold gasket failures
The intake manifold gaskets can deteriorate over time, causing vacuum leaks and poor performance.
Knocking or pinging noise
This issue could be due to carbon buildup in the combustion chambers or using low-quality fuel.
Fuel injector issues
Clogged or malfunctioning fuel injectors can cause rough idling and reduced engine performance.
Cooling system problems
The cooling system, including the radiator and water pump, can fail, leading to overheating issues.
Camshaft position sensor failure
This can lead to engine stalling, poor acceleration, and difficulty starting the engine.
Throttle body issues
Throttle body problems can cause uneven idling and poor throttle response.
Exhaust manifold cracks
The exhaust manifold can develop cracks over time, leading to exhaust leaks and increased engine noise.
Timing chain wear
Over time, the timing chain can stretch or wear, leading to poor engine timing and performance issues.
Mass air flow sensor problems
A failing MAF sensor can cause poor fuel economy, rough idling, and engine hesitation.
HUMMER H2 2005

The 2005 HUMMER H2 SUT is a robust Sport Utility Truck designed for versatility and power. It features a 6.0-liter V8 engine with multipoint fuel injection, powered by gasoline, and operates on a 4WD/4x4 drive type. Manufactured by GENERAL MOTORS LLC in Mishawaka, Indiana, this vehicle boasts a hydraulic brake system and is part of the Class 2G weight category, making it suitable for various terrains and heavy-duty applications. With its impressive build and performance capabilities, the HUMMER H2 SUT exemplifies the rugged elegance of multipurpose passenger vehicles.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2005

The 2005 HUMMER H2 SUT is a robust Sport Utility Truck designed for off-road adventures, equipped with a powerful 6.0L V8 engine and 4WD capability. Manufactured by General Motors, this vehicle features a hydraulic brake system and multipoint fuel injection for optimal performance. With its bold design and substantial Gross Vehicle Weight Rating, the H2 SUT is built for both utility and passenger comfort, making it a versatile multipurpose vehicle.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2005

The 2005 HUMMER H2 is a robust 4WD SUV equipped with a 6.0L V8 engine (LQ4) from GM, boasting hydraulic brakes and multipoint fuel injection. Manufactured by General Motors at the AM General Plant in Mishawaka, Indiana, this vehicle is designed for heavy-duty use, with a gross vehicle weight rating of 8,001 - 9,000 lbs.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2007

The 2007 HUMMER H2 is a robust 4WD SUV with a powerful 6.0L V8 engine (LQ4) by GM, featuring Multipoint Fuel Injection. Manufactured in Mishawaka, Indiana, this full-size 3/4 ton vehicle offers both SUV and SUT trims, making it a versatile choice for off-road adventures and multi-purpose use.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
MFI, Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can develop leaks in the brake lines, calipers, or master cylinder, leading to reduced braking performance.
Brake pedal sponginess
Air trapped in the hydraulic brake system can cause a spongy brake pedal feel, reducing braking efficiency.
Brake rotor warping
Heavy vehicles like the HUMMER H2 can cause brake rotors to warp under high stress, leading to vibrations during braking.
Brake pad wear
The weight and performance of the H2 can lead to quicker wear on brake pads, requiring more frequent replacements.
Overheating issues
The V-shaped LQ4 engine can generate significant heat, which may lead to overheating if the cooling system is not properly maintained.
Oil consumption
The GM LQ4 engine is known to consume oil, which requires regular monitoring and top-ups to prevent engine damage.
Spark plug fouling
The Multiport Fuel Injection (MFI) system can lead to carbon buildup on spark plugs, causing misfires and reduced engine performance.
Exhaust manifold cracking
The iron construction of the LQ4 engine's exhaust manifolds can be prone to cracking under high heat and stress.
Fuel injector problems
MFI systems can have issues with fuel injectors clogging or failing, leading to poor engine performance and fuel economy.
Timing chain wear
Over time, the LQ4 engine's timing chain can stretch or wear, potentially leading to timing issues and engine performance problems.
Cooling system component failure
Components such as the water pump, radiator, and hoses can fail, leading to cooling system issues and potential engine overheating.
HUMMER H2 2007

The 2007 HUMMER H2 is a robust SUV/MPV known for its powerful 6.0L V8 engine with multipoint fuel injection, delivering impressive performance. Built by General Motors in Mishawaka, Indiana, this 4WD vehicle boasts a hydraulic brake system and a gross vehicle weight rating of up to 9,000 lbs. Ideal for both rugged terrains and urban environments, the H2 combines strength with versatility.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
MFI, Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can develop leaks in the brake lines, calipers, or master cylinder, leading to reduced braking performance.
Brake pedal sponginess
Air trapped in the hydraulic brake system can cause a spongy brake pedal feel, reducing braking efficiency.
Brake rotor warping
Heavy vehicles like the HUMMER H2 can cause brake rotors to warp under high stress, leading to vibrations during braking.
Brake pad wear
The weight and performance of the H2 can lead to quicker wear on brake pads, requiring more frequent replacements.
Overheating issues
The V-shaped LQ4 engine can generate significant heat, which may lead to overheating if the cooling system is not properly maintained.
Oil consumption
The GM LQ4 engine is known to consume oil, which requires regular monitoring and top-ups to prevent engine damage.
Spark plug fouling
The Multiport Fuel Injection (MFI) system can lead to carbon buildup on spark plugs, causing misfires and reduced engine performance.
Exhaust manifold cracking
The iron construction of the LQ4 engine's exhaust manifolds can be prone to cracking under high heat and stress.
Fuel injector problems
MFI systems can have issues with fuel injectors clogging or failing, leading to poor engine performance and fuel economy.
Timing chain wear
Over time, the LQ4 engine's timing chain can stretch or wear, potentially leading to timing issues and engine performance problems.
Cooling system component failure
Components such as the water pump, radiator, and hoses can fail, leading to cooling system issues and potential engine overheating.
HUMMER H2 2007

The 2007 HUMMER H2 is a robust 4WD SUV powered by a V8 6.0L GM engine with multipoint fuel injection. Manufactured by General Motors in Mishawaka, Indiana, this full-size 3/4 ton vehicle boasts a hydraulic brake system and a gross vehicle weight rating of 8,001 - 9,000 lbs. With its four-door configuration and iron engine block, it's designed for both rugged terrains and versatile utility.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
MFI, Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can develop leaks in the brake lines, calipers, or master cylinder, leading to reduced braking performance.
Brake pedal sponginess
Air trapped in the hydraulic brake system can cause a spongy brake pedal feel, reducing braking efficiency.
Brake rotor warping
Heavy vehicles like the HUMMER H2 can cause brake rotors to warp under high stress, leading to vibrations during braking.
Brake pad wear
The weight and performance of the H2 can lead to quicker wear on brake pads, requiring more frequent replacements.
Overheating issues
The V-shaped LQ4 engine can generate significant heat, which may lead to overheating if the cooling system is not properly maintained.
Oil consumption
The GM LQ4 engine is known to consume oil, which requires regular monitoring and top-ups to prevent engine damage.
Spark plug fouling
The Multiport Fuel Injection (MFI) system can lead to carbon buildup on spark plugs, causing misfires and reduced engine performance.
Exhaust manifold cracking
The iron construction of the LQ4 engine's exhaust manifolds can be prone to cracking under high heat and stress.
Fuel injector problems
MFI systems can have issues with fuel injectors clogging or failing, leading to poor engine performance and fuel economy.
Timing chain wear
Over time, the LQ4 engine's timing chain can stretch or wear, potentially leading to timing issues and engine performance problems.
Cooling system component failure
Components such as the water pump, radiator, and hoses can fail, leading to cooling system issues and potential engine overheating.
HUMMER H2 2003

The 2003 HUMMER H2 is a robust Sport Utility Vehicle (SUV) with a 6.0L V8 engine (LQ4) manufactured by General Motors. Designed for tough terrains, it features 4-wheel drive and a 4-door configuration. Built in Mishawaka, Indiana, this vehicle falls under the Class 2G weight rating, perfect for both rugged adventures and versatile passenger use.

Spec:

Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8

Problems:

Oil consumption
The LQ4 engine in the 2003 Hummer H2 is known to have higher oil consumption, which can be due to worn piston rings or valve seals.
Intake manifold gasket failures
The intake manifold gaskets can deteriorate over time, causing vacuum leaks and poor performance.
Knocking or pinging noise
This issue could be due to carbon buildup in the combustion chambers or using low-quality fuel.
Fuel injector issues
Clogged or malfunctioning fuel injectors can cause rough idling and reduced engine performance.
Cooling system problems
The cooling system, including the radiator and water pump, can fail, leading to overheating issues.
Camshaft position sensor failure
This can lead to engine stalling, poor acceleration, and difficulty starting the engine.
Throttle body issues
Throttle body problems can cause uneven idling and poor throttle response.
Exhaust manifold cracks
The exhaust manifold can develop cracks over time, leading to exhaust leaks and increased engine noise.
Timing chain wear
Over time, the timing chain can stretch or wear, leading to poor engine timing and performance issues.
Mass air flow sensor problems
A failing MAF sensor can cause poor fuel economy, rough idling, and engine hesitation.
HUMMER H2 2005

The 2005 HUMMER H2 is a robust Sport Utility Vehicle (SUV) powered by a 6.0L V8 engine from General Motors, featuring multipoint fuel injection. With 4-wheel drive and a hydraulic brake system, this vehicle is built for off-road adventures and heavy-duty tasks. Manufactured at the AM General Plant in Mishawaka, Indiana, this 4-door MPV belongs to the 3/4 Ton series, making it a powerful and versatile choice for demanding drivers.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2006

The 2006 HUMMER H2 is a robust Sport Utility Vehicle (SUV) with a V-shaped 6.0L V8 engine, delivering power through a 4WD system. Manufactured by General Motors in Mishawaka, Indiana, this multipurpose passenger vehicle features a hydraulic brake system and multipoint fuel injection. Designed for heavy-duty performance, it falls under the Class 2G weight rating, making it a powerful and capable option for both on-road and off-road adventures.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
MFI, Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the lines or connectors, leading to reduced braking efficiency or brake failure.
Brake pedal sponginess
Air trapped in the hydraulic lines can cause the brake pedal to feel spongy, reducing braking power and responsiveness.
Overheating
The V-shaped LQ4 engine can experience overheating issues due to a malfunctioning thermostat, clogged radiator, or failing water pump.
Oil consumption
The GM LQ4 engine is known for higher oil consumption, which can be due to worn piston rings, valve seals, or PCV system issues.
Fuel injector problems
Multiport Fuel Injection (MFI) systems can develop clogged or leaking fuel injectors, leading to poor engine performance or misfires.
Iron block corrosion
The iron block of the LQ4 engine can suffer from internal corrosion, especially if the coolant is not regularly changed or if the wrong type of coolant is used.
Ignition coil failure
The V8 engine may experience ignition coil failures, leading to misfires, rough idling, and decreased engine performance.
Transmission issues
The 2006 HUMMER H2 is known to have transmission problems such as slipping, hard shifts, or failure, often related to the 4L65E transmission used in conjunction with the LQ4 engine.
Suspension wear
The heavy weight of the HUMMER H2 can lead to accelerated wear on suspension components such as bushings, ball joints, and shock absorbers.
Electrical problems
The 2006 HUMMER H2 often faces electrical issues, including faulty wiring, failing alternators, and battery drain problems.
HUMMER H2 2005

The 2005 HUMMER H2 Sport Utility Truck (SUT) is a robust multipurpose passenger vehicle designed by General Motors. Powered by a 6.0L V8 engine with multipoint fuel injection, this 4WD beast is built for both power and utility. Manufactured in Mishawaka, Indiana, it boasts a gross vehicle weight rating between 8,001 and 9,000 pounds, making it perfect for heavy-duty tasks.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2003

The 2003 HUMMER H2 is a robust SUV, powered by a 6.0L V8 engine named LQ4 from GM. It features a 4WD system, making it suitable for off-road adventures. With its 4-door design and a gross vehicle weight rating between 8,001 to 9,000 lbs, this vehicle is built for both utility and performance. Manufactured in the USA, specifically in Mishawaka, Indiana, by AM General for General Motors.

Spec:

Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8

Problems:

Oil consumption
The LQ4 engine in the 2003 Hummer H2 is known to have higher oil consumption, which can be due to worn piston rings or valve seals.
Intake manifold gasket failures
The intake manifold gaskets can deteriorate over time, causing vacuum leaks and poor performance.
Knocking or pinging noise
This issue could be due to carbon buildup in the combustion chambers or using low-quality fuel.
Fuel injector issues
Clogged or malfunctioning fuel injectors can cause rough idling and reduced engine performance.
Cooling system problems
The cooling system, including the radiator and water pump, can fail, leading to overheating issues.
Camshaft position sensor failure
This can lead to engine stalling, poor acceleration, and difficulty starting the engine.
Throttle body issues
Throttle body problems can cause uneven idling and poor throttle response.
Exhaust manifold cracks
The exhaust manifold can develop cracks over time, leading to exhaust leaks and increased engine noise.
Timing chain wear
Over time, the timing chain can stretch or wear, leading to poor engine timing and performance issues.
Mass air flow sensor problems
A failing MAF sensor can cause poor fuel economy, rough idling, and engine hesitation.
HUMMER H2 2005

The 2005 HUMMER H2 is an iconic 4WD SUV powered by a robust 6.0L V8 engine (LQ4) from GM. Built in Mishawaka, Indiana, this multipurpose passenger vehicle features a hydraulic brake system and multipoint fuel injection. With a gross vehicle weight rating of up to 9,000 lbs, it's designed for both rugged off-road adventures and comfortable passenger transport.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2006

The 2006 HUMMER H2 is a robust 4WD SUV powered by a 6.0L V8 engine, featuring multipoint fuel injection. Manufactured by General Motors and assembled in Mishawaka, Indiana, this multipurpose passenger vehicle boasts a gross weight rating between 8,001-9,000 lbs. Ideal for off-road adventures and rugged terrains, the H2 combines power and durability.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
MFI, Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the lines or connectors, leading to reduced braking efficiency or brake failure.
Brake pedal sponginess
Air trapped in the hydraulic lines can cause the brake pedal to feel spongy, reducing braking power and responsiveness.
Overheating
The V-shaped LQ4 engine can experience overheating issues due to a malfunctioning thermostat, clogged radiator, or failing water pump.
Oil consumption
The GM LQ4 engine is known for higher oil consumption, which can be due to worn piston rings, valve seals, or PCV system issues.
Fuel injector problems
Multiport Fuel Injection (MFI) systems can develop clogged or leaking fuel injectors, leading to poor engine performance or misfires.
Iron block corrosion
The iron block of the LQ4 engine can suffer from internal corrosion, especially if the coolant is not regularly changed or if the wrong type of coolant is used.
Ignition coil failure
The V8 engine may experience ignition coil failures, leading to misfires, rough idling, and decreased engine performance.
Transmission issues
The 2006 HUMMER H2 is known to have transmission problems such as slipping, hard shifts, or failure, often related to the 4L65E transmission used in conjunction with the LQ4 engine.
Suspension wear
The heavy weight of the HUMMER H2 can lead to accelerated wear on suspension components such as bushings, ball joints, and shock absorbers.
Electrical problems
The 2006 HUMMER H2 often faces electrical issues, including faulty wiring, failing alternators, and battery drain problems.
HUMMER H2 2003

The 2003 HUMMER H2 is a robust SUV with a 6.0L V8 engine from GM, delivering power through its 4WD system. Built in Mishawaka, Indiana by AM General, this 4-door multipurpose passenger vehicle fits into the Class 2G weight category. Perfect for off-road adventures, it combines luxury with ruggedness.

Spec:

Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8

Problems:

Oil consumption
The LQ4 engine in the 2003 Hummer H2 is known to have higher oil consumption, which can be due to worn piston rings or valve seals.
Intake manifold gasket failures
The intake manifold gaskets can deteriorate over time, causing vacuum leaks and poor performance.
Knocking or pinging noise
This issue could be due to carbon buildup in the combustion chambers or using low-quality fuel.
Fuel injector issues
Clogged or malfunctioning fuel injectors can cause rough idling and reduced engine performance.
Cooling system problems
The cooling system, including the radiator and water pump, can fail, leading to overheating issues.
Camshaft position sensor failure
This can lead to engine stalling, poor acceleration, and difficulty starting the engine.
Throttle body issues
Throttle body problems can cause uneven idling and poor throttle response.
Exhaust manifold cracks
The exhaust manifold can develop cracks over time, leading to exhaust leaks and increased engine noise.
Timing chain wear
Over time, the timing chain can stretch or wear, leading to poor engine timing and performance issues.
Mass air flow sensor problems
A failing MAF sensor can cause poor fuel economy, rough idling, and engine hesitation.
HUMMER H2 2005

The 2005 HUMMER H2 is a robust SUV designed for both off-road and on-road adventures. Powered by a V8 6.0L engine from GM, it features a 4WD system and multipoint fuel injection for superior performance. With a gross vehicle weight rating of up to 9,000 lbs, this 4-door SUV is built at the AM General Plant in Mishawaka, Indiana.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2005

The 2005 HUMMER H2 is a robust Sport Utility Vehicle (SUV) with a 6.0L V8 engine, delivering powerful performance with its 4WD system. Manufactured by General Motors LLC in Mishawaka, Indiana, this MPV features multipoint fuel injection and a hydraulic brake system. It boasts a gross vehicle weight rating of Class 2G, making it suitable for heavy-duty use.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2003

The 2003 HUMMER H2 is a robust SUV with a 6.0L V8 engine (LQ4) manufactured by GM. This 4WD vehicle offers a powerful driving experience, ideal for both rugged terrains and urban environments. Built in Mishawaka, Indiana, it falls under the Class 2G weight category, making it a solid choice for those in need of a multipurpose passenger vehicle.

Spec:

Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8

Problems:

Oil consumption
The LQ4 engine in the 2003 Hummer H2 is known to have higher oil consumption, which can be due to worn piston rings or valve seals.
Intake manifold gasket failures
The intake manifold gaskets can deteriorate over time, causing vacuum leaks and poor performance.
Knocking or pinging noise
This issue could be due to carbon buildup in the combustion chambers or using low-quality fuel.
Fuel injector issues
Clogged or malfunctioning fuel injectors can cause rough idling and reduced engine performance.
Cooling system problems
The cooling system, including the radiator and water pump, can fail, leading to overheating issues.
Camshaft position sensor failure
This can lead to engine stalling, poor acceleration, and difficulty starting the engine.
Throttle body issues
Throttle body problems can cause uneven idling and poor throttle response.
Exhaust manifold cracks
The exhaust manifold can develop cracks over time, leading to exhaust leaks and increased engine noise.
Timing chain wear
Over time, the timing chain can stretch or wear, leading to poor engine timing and performance issues.
Mass air flow sensor problems
A failing MAF sensor can cause poor fuel economy, rough idling, and engine hesitation.
HUMMER H2 2003

The 2003 HUMMER H2 is a robust SUV equipped with a powerful 6.0L V8 engine (LQ4) from GM, delivering impressive performance through its 4-wheel drive system. Built by General Motors in Mishawaka, Indiana, this multipurpose passenger vehicle is designed for both rugged terrain and daily commutes. With its Class 2G gross vehicle weight rating, it's a durable option for those needing a reliable and versatile vehicle.

Spec:

Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8

Problems:

Oil consumption
The LQ4 engine in the 2003 Hummer H2 is known to have higher oil consumption, which can be due to worn piston rings or valve seals.
Intake manifold gasket failures
The intake manifold gaskets can deteriorate over time, causing vacuum leaks and poor performance.
Knocking or pinging noise
This issue could be due to carbon buildup in the combustion chambers or using low-quality fuel.
Fuel injector issues
Clogged or malfunctioning fuel injectors can cause rough idling and reduced engine performance.
Cooling system problems
The cooling system, including the radiator and water pump, can fail, leading to overheating issues.
Camshaft position sensor failure
This can lead to engine stalling, poor acceleration, and difficulty starting the engine.
Throttle body issues
Throttle body problems can cause uneven idling and poor throttle response.
Exhaust manifold cracks
The exhaust manifold can develop cracks over time, leading to exhaust leaks and increased engine noise.
Timing chain wear
Over time, the timing chain can stretch or wear, leading to poor engine timing and performance issues.
Mass air flow sensor problems
A failing MAF sensor can cause poor fuel economy, rough idling, and engine hesitation.
HUMMER H2 2006

The 2006 HUMMER H2 is a robust Sport Utility Truck (SUT) featuring a 6.0L V8 engine with Multipoint Fuel Injection (MPFI). It comes equipped with a 4WD system and has a Gross Vehicle Weight Rating in the Class 2G range (8,001 - 9,000 lbs). Manufactured by General Motors LLC in Mishawaka, Indiana, this model is designed for both power and versatility.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
MFI, Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the lines or connectors, leading to reduced braking efficiency or brake failure.
Brake pedal sponginess
Air trapped in the hydraulic lines can cause the brake pedal to feel spongy, reducing braking power and responsiveness.
Overheating
The V-shaped LQ4 engine can experience overheating issues due to a malfunctioning thermostat, clogged radiator, or failing water pump.
Oil consumption
The GM LQ4 engine is known for higher oil consumption, which can be due to worn piston rings, valve seals, or PCV system issues.
Fuel injector problems
Multiport Fuel Injection (MFI) systems can develop clogged or leaking fuel injectors, leading to poor engine performance or misfires.
Iron block corrosion
The iron block of the LQ4 engine can suffer from internal corrosion, especially if the coolant is not regularly changed or if the wrong type of coolant is used.
Ignition coil failure
The V8 engine may experience ignition coil failures, leading to misfires, rough idling, and decreased engine performance.
Transmission issues
The 2006 HUMMER H2 is known to have transmission problems such as slipping, hard shifts, or failure, often related to the 4L65E transmission used in conjunction with the LQ4 engine.
Suspension wear
The heavy weight of the HUMMER H2 can lead to accelerated wear on suspension components such as bushings, ball joints, and shock absorbers.
Electrical problems
The 2006 HUMMER H2 often faces electrical issues, including faulty wiring, failing alternators, and battery drain problems.
HUMMER H2 2005

The 2005 HUMMER H2 is a robust SUV featuring a 6.0L V8 engine (LQ4) with multipoint fuel injection, delivering power and versatility. Manufactured by General Motors in Mishawaka, Indiana, this 4WD vehicle combines off-road capability with a gross vehicle weight rating between 8,001 - 9,000 lbs. Its hydraulic brake system and four doors provide both safety and convenience for passengers.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2005

The 2005 HUMMER H2 SUT is a robust Sport Utility Truck powered by a 6.0L V8 engine with multipoint fuel injection. Built in Mishawaka, Indiana, this 4WD vehicle offers a mix of power and versatility. With a gross vehicle weight rating of 8,001 - 9,000 lbs, it's designed for heavy-duty tasks while providing the comfort of a multipurpose passenger vehicle.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2005

The 2005 HUMMER H2 is a robust SUV equipped with a 6.0L V8 engine (LQ4) delivering power through a 4WD system. Manufactured by General Motors in Mishawaka, Indiana, this vehicle features a multipoint fuel injection system and hydraulic brakes. With a gross vehicle weight rating of 8,001 - 9,000 lbs, it's designed for serious off-road and multi-purpose use.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2005

The 2005 HUMMER H2 is a robust SUV/MPV powered by a 6.0L V8 engine, produced by GM. With a 4WD system, it is designed for versatility and off-road capability. Manufactured in Mishawaka, Indiana, this vehicle features hydraulic brakes and multipoint fuel injection, making it a powerful and reliable choice for multipurpose use.

Spec:

Brake System Type
Hydraulic
Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8
Other Engine Info
Iron

Problems:

Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to decreased braking efficiency.
Brake pedal fade
Over time, the brake pedal may become soft or spongy, often due to air in the brake lines or deteriorating brake fluid.
Brake rotor warping
Heavy usage or overheating can cause the brake rotors to warp, leading to vibrations and reduced braking performance.
Abs malfunction
The Anti-lock Braking System (ABS) sensors or control module may fail, causing the ABS warning light to illuminate and potentially compromising braking safety.
Engine misfires
The V-shaped LQ4 engine may experience misfires due to faulty spark plugs, ignition coils, or fuel injectors.
Oil consumption
The LQ4 engine can consume more oil than expected, leading to more frequent oil changes and the need to monitor oil levels closely.
Cooling system issues
The iron block of the LQ4 engine can be prone to overheating, especially if the cooling system is not maintained properly.
Transmission problems
The 2005 HUMMER H2 may experience issues with the automatic transmission, such as hard shifting or slipping gears.
Fuel pump failure
The fuel pump may fail, causing the engine to stutter or not start at all.
Suspension wear
The heavy weight of the HUMMER H2 can cause premature wear on suspension components like bushings, ball joints, and shocks.
HUMMER H2 2003

The 2003 HUMMER H2 is a robust SUV/MPV powered by a 6.0L V8 engine from GM, delivering strong 4WD performance. Manufactured in Mishawaka, Indiana, this vehicle is designed for tough terrains and heavy-duty usage, fitting within the Class 2G weight rating. With its iconic design and powerful LQ4 engine, the H2 stands out in the multipurpose passenger vehicle category.

Spec:

Engine Configuration
V-Shaped
Engine Manufacturer
GM
Engine Model
LQ4
Engine Number of Cylinders
8

Problems:

Oil consumption
The LQ4 engine in the 2003 Hummer H2 is known to have higher oil consumption, which can be due to worn piston rings or valve seals.
Intake manifold gasket failures
The intake manifold gaskets can deteriorate over time, causing vacuum leaks and poor performance.
Knocking or pinging noise
This issue could be due to carbon buildup in the combustion chambers or using low-quality fuel.
Fuel injector issues
Clogged or malfunctioning fuel injectors can cause rough idling and reduced engine performance.
Cooling system problems
The cooling system, including the radiator and water pump, can fail, leading to overheating issues.
Camshaft position sensor failure
This can lead to engine stalling, poor acceleration, and difficulty starting the engine.
Throttle body issues
Throttle body problems can cause uneven idling and poor throttle response.
Exhaust manifold cracks
The exhaust manifold can develop cracks over time, leading to exhaust leaks and increased engine noise.
Timing chain wear
Over time, the timing chain can stretch or wear, leading to poor engine timing and performance issues.
Mass air flow sensor problems
A failing MAF sensor can cause poor fuel economy, rough idling, and engine hesitation.
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