DTC B1004: Keep Alive Memory Data Lost: 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.

Module contains a data storage area which can save pertinent data when ignition is turned to OFF position. Keep Alive Memory (KAM) data is lost if battery power is removed from the module. KAM area is an integral part of the microprocessor and cannot be serviced separately. DTC B1004 indicates that keep alive, or long term, memory in module has been reset. This is a normal occurrence whenever power or ground is removed from the module, such as when the battery is disconnected and reconnected. Microprocessor reverts back to base programmed critical operating data until new data is learned and stored in KAM. A current DTC clears when malfunction is no longer present. A history DTC clears when module ignition cycle counter reaches reset threshold, without a repeat of the malfunction.