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DTC B1000: Body Control Module Internal Fault: Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana Special, 2001 GMC Savana Camper Special, and 2001 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.
  1. If appropriate diagnostic system check has been performed for system exhibiting symptom, go to next step. If appropriate diagnostic system check has not been performed for system exhibiting symptom, perform appropriate diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  table under SELF-DIAGNOSTIC SYSTEM.
  2. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC), located below steering column. Turn ignition switch to RUN position. Retrieve DTCs. If DTC B1004 is retrieved as a current DTC, go to next step. If DTC B1004 is not retrieved as current, go to DIAGNOSTIC AIDS  .
  3. Replace appropriate module. After repair, go to next step.
  4. Using scan tool, clear DTCs. Operate vehicle within conditions for running the DTC as specified in supporting text. If DTC resets, go to step  2 .
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