Throttle Position/Torque Management
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 TCM receives input on throttle position/torque management from a signal transmitted by the engine control module (ECM).
The ECM communicates directly to the transmission electronic controls over an SAE J1850 or J1939 serial communication interface (SCI) data link. The TCM must be calibrated to receive these signals.