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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 920 (Automatic Transmission - ALLISON - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> On-Vehicle Repair Instructions >> Wiring Harness Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Attaching Internal Wiring Harness Connectors
    GM1633341Courtesy of GENERAL MOTORS CORP.
  1. Align the tabs on the new wiring harness (10) U-channel with the solenoid retainer slots for SS3 (3) and SS2 (2) on the control valve assembly. Install the solenoid retainers (12) for the SS3 (3) and SS2 (2) solenoids.
    2. IMPORTANT: The internal wiring harness connectors should be in the correct position for installation because of their pre-assembled position in the U-channel.
  2. Attach the internal wiring harness (10) connectors to the solenoids, the IMS, and the TFP switch.
    • Connector (8) goes to SS1 (5)
    • Connector (9) goes to the TFP switch (7)
    • Connector (11) goes to the MAIN MOD solenoid (19)
    • Connector (13) goes to the IMS
    • Connector (14) goes to the TCC PCS (1)
    • Connector (15) goes to SS2 (2)
    • Connector (16) goes to SS3 (3)
    • Connector (17) goes to PCS1 (4)
    • Connector (18) goes to PCS2 (6)
    3. Fig 2: Identifying Main Transmission Connector
    GM1633296Courtesy of GENERAL MOTORS CORP.
  3. Push the main transmission connector (2) outward through hole (1) in the transmission case until the retaining feet on the connector are near the locked position.
    4. Fig 3: Using J 44247 To Seat Transmission Connector
    GM1633298Courtesy of GENERAL MOTORS CORP.
  4. Use J 44247  to seat the retaining feet on transmission connector (1). See Special Tools .
  5. Install the oil pan and transmission internal oil filter. Refer to Oil Pan Replacement .
  6. Connect the external wiring harness to the main transmission connector.
    7. IMPORTANT: The FastLearn, adapt, procedure must be performed. This can be done in 1 step using a scan tool. If this procedure is not done, the TCM adaptive values will be at the settings that it learned for the old components and will be in slow adaptive mode. Under these conditions, it will take an unacceptably long time for the adaptive values to converge to levels suitable for the new transmission.
  7. Perform the FastLearn procedure. Refer to FastLearn Procedure .
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