Preliminary Inspection
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.
Perform a visual inspection to locate the cause of the problem.
- Refer to Symptoms - Engine Controls .
- The fault must be present to locate the problem. If a fault is intermittent, the use of DTC tables may result in the replacement of good parts.