Sierra 3500 2WD V8-6.0L VIN U (2004)
4. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the negative cable clip from the positive cable clip.
5. Remove the engine wiring harness ground/negative cable bolt.
6. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
7. If equipped with a 8.1L engine, remove the negative cable clip from the positive cable clip.
8. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
9. Remove the engine wiring harness ground/negative cable bolt.
10. Reposition the wiring harness ground and negative cables.
11. Remove the forward lamp wiring harness ground/negative cable bolt.
12. Lower the vehicle.
13. Remove the negative battery cable.