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The 2003 GMC Sierra 2500 is a robust pickup truck with an extended cab and a powerful 6.0L V8 engine. Equipped with 4WD and multipoint fuel injection, it is designed for heavy-duty tasks with a gross vehicle weight rating of up to 9,000 lbs. Manufactured by General Motors in Fort Wayne, Indiana, this truck is ideal for both rugged terrain and heavy hauling.

Decoded VIN:

Make

GMC

Manufacturer Name

GENERAL MOTORS LLC

Model

Sierra

Model Year

2003

Plant City

ROANOKE

Series

2500 (3/4 Ton)

Vehicle Type

TRUCK

Plant Country

UNITED STATES (USA)

Plant Company Name

Fort Wayne Assembly

Plant State

INDIANA

Body Class

Pickup

Gross Vehicle Weight Rating From

Class 2G: 8,001 - 9,000 lb (3,629 - 4,082 kg)

Cab Type

Extra/Super/Quad/Double/King/Extended

Drive Type

4WD/4-Wheel Drive/4x4

Engine Number of Cylinders

Displacement (CC)

6000.0

Displacement (CI)

366.14246456839

Displacement (L)

6.0

Engine Model

LQ4 Iron

Fuel Type - Primary

Gasoline

Engine Configuration

V-Shaped

Fuel Delivery / Fuel Injection Type

Multipoint Fuel Injection (MPFI)

Most common problems:

Oil consumption

The LQ4 Iron V8 engines are known to consume oil more than usual, which can lead to low oil levels if not regularly monitored.

Knocking noise

This engine might develop a knocking noise due to piston slap, especially when the engine is cold.

Fuel injector issues

Fuel injectors can become clogged or fail, leading to poor engine performance and reduced fuel efficiency.

Intake manifold gasket leaks

The intake manifold gaskets can deteriorate over time, causing coolant leaks and potential engine overheating.

Crankshaft position sensor failure

This sensor can fail, causing the engine to stall or have difficulty starting.

Exhaust manifold cracks

The exhaust manifolds are prone to cracking, leading to exhaust leaks and increased engine noise.

Throttle body malfunction

The throttle body can become dirty or fail, leading to poor throttle response and engine stalling.

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