Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The crankshaft position (CKP) signal is not needed to start and run.
Many situations may lead to an intermittent condition. Perform each inspection or test as directed.

IMPORTANT: Remove any debris from the connector surfaces before servicing a component. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion.

Inspect the PCM and the engine grounds for clean and secure connections. Refer to Wiring Repairs in Wiring Systems.
For intermittent conditions, refer to Intermittent Conditions .