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.
The Transmission Control Module (TCM) receives input from the Powertrain Control Module (PCM) on the torque response reply signal circuit (2467) and delivered torque signal circuit (464) for managed net engine torque. The TCM monitors and compares the engine input torque signals for proper torque requested values. The TCM sends a signal via requested torque signal circuit (463) to the engine if a torque reduction is needed.
This is a type "X" DTC for the 6.6L models, and a type "B" DTC for the 8.1L models.