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.
DTC B1001 is an indication that the restraints ID stored in both the BCM and SDM do not match or that the VIN stored in the BCM does not match the VIN stored either in SDM or in radio. If any of the modules mentioned above were replaced, the replaced module need to be reprogrammed for proper operation.