Sierra 1500 2WD V6-4.3L (2008)
4. Inspect the wiring harness along the left side frame rail at the body mounts for chafed/shorted wiring as shown.
5. If the wiring is damaged, repair as needed. Refer to Wiring Systems and Power Management > Diagnostic Information and Procedures > Wiring
Repairs in SI.
6. Protect the harness by covering the sharp edge with butyl tape or a suitable material. Secure the harness as needed.
7. Lower the vehicle.
8. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in SI.
9. Clear any DTCs that may be present with a scan tool and verify the proper operation of the vehicle.
Chafed Wiring Harness Near Data Link Resistor
Chafed Wiring Harness Near Data Link Resistor Causing Intermittent No/Crank and/or Scan Tool Does Not Communicate with High Speed
GMLAN Device
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. Typical location of a data link resistor (3) mounted on the chassis.
