Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
You must perform Circuit/System Verification before proceeding with Circuit/System Testing.
- If there are any other DTCs set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Attempt to start the engine.
- If the engine does not start refer to Engine Cranks but Does Not Run .
- Inspect for mechanical conditions that can limit engine speed.
- If any abnormal conditions are present, refer to Symptoms - Engine Mechanical .