Diagnostic Aids: Notes
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1001 is an indication that the restraints ID stored in both the BCM and the SDM do not match or that the VIN stored in the BCM does not match the VIN stored either in the SDM or in the radio. If any of the modules mentioned above were previously replaced, the replaced module needs to be reprogrammed for proper operation.