Fuel System Description
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
If the fuel supply system is not delivering enough fuel driveability could be greatly affected. If air is being drawn into the fuel injection system a Cranks But Will Not Run, or a Hard Start symptom could exist. If another diagnosis indicates, or if the fuel supply system is suspected of not delivering enough fuel or drawing air, the following systems should be checked:
- Any air leaks or restrictions between the fuel injection pump and the fuel tank will seriously affect pump output.
- Insufficient fuel in the fuel tank.
- Any loose fuel component connections.
- Any hoses and lines that are flattening when the engine is running, or have kinks that would restrict the flow of fuel.