Circuit Description
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet 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.