Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1001 is an indication that restraints identification stored in BCM and SDM DO NOT match, or that VIN's stored in PCM and SDM do not match. If BCM or SDM have been replaced, Vehicle Theft Deterrent (VTD) will need to be reprogrammed.