Circuit Description
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 will set if an abnormal power-down sequence has occurred. This condition means the Transmission Control Module (TCM) has lost battery positive voltage circuit (supply voltage) before it has finished saving information from that drive cycle. This process is usually completed in less than 10 seconds.
This is a type "C" DTC.