Internal Wiring Harness
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The internal wiring harness has connectors (7, 3 and 4) for the shift solenoids C, D and E. Connectors 6 and 5 go to clutch pressure control solenoid A and B. Connector 2 goes to the torque converter clutch pulse width modulated (TCC PWM) solenoid. There is also a connector (1) for the pressure switch manifold and modulated main pressure solenoid (9). All of these connectors go to the main electrical connector (8). The transmission main electrical connector transports signals from these connectors to the TCM via the external harness.