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The 1990 GMC Jimmy is a robust 4WD SUV with a powerful 5.7L V8 engine delivering impressive performance. This versatile vehicle features a hydraulic brake system and throttle body fuel injection, making it suitable for various terrains and driving conditions. Built in Flint, Michigan, the Jimmy offers a sturdy build with a Class 2E Gross Vehicle Weight Rating and the capability for LPG conversion.

Decoded VIN:

Make

GMC

Manufacturer Name

GENERAL MOTORS LLC

Model

Jimmy

Model Year

1990

Plant City

FLINT

Series

1/2 Ton Nominal

Vehicle Type

MULTIPURPOSE PASSENGER VEHICLE (MPV)

Plant Country

UNITED STATES (USA)

Plant Company Name

NA - Truck Platform

Plant State

MICHIGAN

Series2

Conventional Cab

Body Class

Sport Utility Vehicle (SUV)/Multi-Purpose Vehicle (MPV)

Doors

Gross Vehicle Weight Rating From

Class 2E: 6,001 - 7,000 lb (2,722 - 3,175 kg)

Drive Type

4WD/4-Wheel Drive/4x4

Brake System Type

Hydraulic

Engine Number of Cylinders

Displacement (CC)

5700.0

Displacement (CI)

347.83534133997

Displacement (L)

5.7

Fuel Type - Primary

Gasoline

Engine Configuration

V-Shaped

Fuel Delivery / Fuel Injection Type

Throttle Body Fuel Injection (TBI)

Other Engine Info

LPG conversion can be accomplished on the engine.

Engine Manufacturer

CPC

Most common problems:

Brake fluid leaks

Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to reduced braking efficiency.

Brake fade

Overheating of the brake components can cause a temporary loss of braking power, often due to prolonged use or heavy braking.

Brake pad wear

Brake pads can wear out over time and require regular inspection and replacement to ensure effective braking performance.

Master cylinder failure

The master cylinder can fail, leading to a loss of hydraulic pressure and consequently, a loss in braking power.

Vacuum booster issues

Problems with the brake vacuum booster can result in a hard brake pedal and reduced braking assistance.

Ignition system problems

V-shaped engines, especially older models, may suffer from ignition system issues like worn spark plugs, faulty ignition coils, or distributor problems.

Cooling system failures

V8 engines generate a lot of heat, and cooling system failures can lead to overheating, which can cause severe engine damage.

Oil leaks

V8 engines are prone to oil leaks from valve cover gaskets, oil pan gaskets, and rear main seals.

Fuel delivery problems

Issues with the fuel pump, fuel injectors, or fuel filter can lead to engine performance problems or failure to start.

Lpg conversion issues

If the engine has been converted to run on LPG, there can be problems with the conversion kit, such as leaks, improper installation, or tuning issues.

Intake manifold gasket leaks

The V8 configuration can suffer from intake manifold gasket leaks, which can cause coolant and air leaks, leading to poor engine performance.

Exhaust manifold cracks

Over time, the exhaust manifolds on V8 engines can crack, leading to exhaust leaks and increased engine noise.

Timing chain wear

Older V8 engines can experience timing chain wear, which can lead to engine timing issues and potential engine damage if not addressed.

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