Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .



2. Unsnap the positive battery cable cap.
3. Disconnect the positive battery cable.




Important: The bolt is integral to the battery cable and is not removable.

4. Loosen the positive battery cable bolt at the underhood bussed electrical center (UBEC).



5. If necessary, remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical - 4.8L, 5.3L, and 6.0L.
6. Unsnap the junction block cover.
7. Remove the positive battery cable (1) from the junction block.



8. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the negative cable clip from the positive cable clip.
9. Raise and suitably support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.



10. If equipped with a 8.1L engine, remove the negative cable clip from the positive cable clip.
11. Raise and suitably support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.



12. Remove the positive battery cable channel bolt.
13. Slide the channel pin out of the oil pan tab.
14. Remove the positive battery cable from the channel.



15. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the battery cable bracket bolt and bracket from the power steering pump.



16. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the positive cable nut (1).
17. Remove the positive cable from the starter.
18. Remove the positive cable clip from the clip on the oil pan.
19. Remove the positive cable from the clip on the oil pan.
20. Remove the positive battery cable.



21. If equipped with a 8.1L engine, remove the positive cable nut .
22. Remove the positive cable from the starter.
23. Remove the positive cable clip nut.
24. Remove the positive cable from the engine harness clip.
25. Remove the positive battery cable.

1. If equipped with a 8.1L engine, install the positive battery cable.
2. Install the positive cable to the engine harness clip.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the positive cable clip nut.

Tighten
Tighten the nut to 8 N·m (71 lb in).

4. Install the positive cable to the starter.
5. Install the positive cable nut .

Tighten
Tighten the nut to 9 N·m (80 lb in).




6. If equipped with a 4.8L, 5.3L, or 6.0L engine, install the positive battery cable.
7. Install the positive cable to the clip on the oil pan.
8. Install the positive cable clip to the clip on the oil pan.
9. Install the positive cable to the starter.
10. Install the positive cable nut (1).

Tighten
Tighten the nut to 9 N·m (80 lb in).




11. If equipped with a 4.8L, 5.3L, or 6.0L engine, install the battery cable bracket and bolt to the power steering pump.

Tighten
Tighten the bolt to 25 N·m (18 lb ft).




12. Install the positive battery cable to the channel.
13. Slide the channel pin into the oil pan tab.
14. Install the positive battery cable channel bolt.

Tighten
Tighten the bolt to 12 N·m (106 lb in).

15. Lower the vehicle.



16. If equipped with a 8.1L engine, install the negative cable clip to the positive cable clip.



17. If equipped with a 4.8L, 5.3L, or 6.0L engine, install the negative cable clip to the positive cable clip.



18. Install the positive battery cable (1) into the junction block.
19. Snap the junction block cover closed.
20. If necessary, install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical - 4.8L, 5.3L, and 6.0L.



21. Tighten the positive cable bolt at the UBEC.

Tighten
Tighten the bolt to 9 N·m (80 lb in).




22. Connect the positive battery cable.

Tighten
Tighten the bolt to 17 N·m (13 lb ft).

23. Snap the positive battery cable cap closed.



24. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .