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1GTHK24G13E195629
Vehicle Summary
The 2003 GMC Sierra 2500 is a robust 3/4 ton pickup truck, powered by a formidable 8.1L V8 engine with multipoint fuel injection. Featuring 4-wheel drive, this truck is built for heavy-duty tasks with a gross vehicle weight rating of up to 10,000 lbs. Manufactured in Pontiac, Michigan by General Motors, it combines American engineering with reliable performance.
Complete Specifications
Common Issues for This Vehicle
Oil consumption
Excessive oil consumption is a common issue with V-shaped engines, including the WRN L18, due to potential valve seal or piston ring wear.
Coolant leaks
The 2003 GMC Sierra with the WRN L18 engine is known for coolant leaks, particularly from the intake manifold gaskets.
Misfires
Misfires can occur due to ignition coil or spark plug failure, which is a frequent problem in V8 engines like the one in the 2003 GMC Sierra.
Knocking noise
Engine knocking or pinging is often caused by issues with the fuel injectors, carbon buildup, or poor-quality fuel.
Overheating
Overheating can result from a faulty thermostat, water pump failure, or clogged radiator, which are common in older V-shaped engines.
Timing chain wear
The WRN L18 engine may experience timing chain wear, leading to poor engine performance or potential engine damage if not addressed.
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