Sierra 1500 4WD V8-6.0L (2007)
Procedures to Diagnose/Chafed Wiring Harness at Trans Case
Information for the Procedures to Diagnose and Repair the Above Conditions
1. Perform the Diagnostic System Check-Vehicle to begin your diagnosis of these conditions.
2. Perform a thorough visual inspection of the vehicle.
3. Depending on the vehicle, some of the procedures may not be applicable.
4. The following procedure is the only one applicable to the Corvette and XLR.
Chafed Wiring Harness at Transmission Case Retaining Clip and Inspection of the 16-way Electrical Connector for Backed Out Terminals
1. Turn OFF the ignition and all accessories.
2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in SI.
3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
4. Locate the 16-way electrical connector on the right side of the automatic transmission as shown.
5. Inspect for a pinched/cut wiring harness where it is attached at the transmission by a metal attachment clip as shown. Inspect any of these harness
clips that you may observe as needed.
If the wiring is damaged, repair as needed. Refer to Wiring Systems and Power Management > Diagnostic Information and Procedures in SI.
6. Protect the harness by covering the sharp edge with butyl tape or a suitable material. Secure the harness as needed.
