Internal Wiring Harness

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Internal Wiring Harness

Courtesy of GENERAL MOTORS CORP.

The internal wiring harness has connectors for shift solenoids SS1 (7), SS2 (3) and SS3 (4), PCS1 (6) and PCS2 (5), TCC pressure control solenoid (TCC PCS) (2), and the PSM (1). There is also a connector for the modulated main (MOD MAIN) pressure solenoid (9) and the IMS (10). 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.