Circuit Description
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The transmission control module (TCM) continuously monitors the alive rolling count generated in the body control module (BCM). If the TCM detects errors in the alive rolling count, monitored through the serial data bus, DTC P1761 or P1762 set. DTC P1761 and P1762 are type C DTCs.