Diagnostic Aids
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Use a scan tool in order to inspect the Passlock™ data voltage and the Passlock™ code.
- Inspect for poor connections at the Passlock™ sensor. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS .