Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. 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(tm) data voltage and the Passlock(tm) code.
- Inspect for poor connections at the Passlock(tm) sensor. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS .