DTC B1000: Body Control Module Internal Fault: Description
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.
Internal fault detection is handled inside control module. No external circuits are involved. When DTC B1000 sets, microprocessor refuses all additional inputs. A current DTC clears when malfunction no longer exists. A history DTC clears when module ignition cycle counter reaches reset threshold, without a repeat of malfunction.