Throttle Position/Torque Management
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 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.