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.
DTC is an indication that restraints identification stored in BCM and SDM do not match or that VIN's stored in both PCM and SDM do not match. If BCM or SDM were replaced, Vehicle Theft Deterrent (VTD) system will need to be reprogrammed.