Throttle Position/Torque Management
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 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 electronic controls.
The engine electronic controls communicate directly to the transmission electronic controls over an SAE J1850 or J1939 Serial Communication Interface (SCI) data link. The transmission TCM must be calibrated to receive these signals.