Generator Replacement 4.8L, 5.3L, 6.0L

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
2. Remove the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical-4.8L, 5.3L, 6.0L.



3. Disconnect the electrical connections from the generator.



4. Remove the generator mounting bolts.
5. Remove the generator.

1. Install the generator.

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.

2. Install the generator mounting bolts.

Tighten
Tighten the bolts to 50 N·m (37 lb ft).




3. Connect the electrical connections to the generator.

Tighten
Tighten the B+ nut to 18 N·m (13 lb ft).

4. Install the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical.
5. Connect the negative battery cable.

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

Generator Replacement 4.3L

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.
2. Disconnect the terminal plug from the back of the generator.



3. Disconnect the battery lead from the back of the generator.
4. Remove the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical-4.3L.



5. Remove the generator mounting bolts.
6. Remove the generator from the generator mounting bracket.

1. Install the generator into the generator mounting bracket.

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.

2. Connect the generator mounting bolts.

Tighten

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

•	Tighten the left mounting bolt to 50 N·m (37 lb ft).

•	Tighten the mounting bracket bolt at the back of the generator to 25 N·m (18 lb ft).

3. Install the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical-4.3L.
4. Connect the terminal plug to the back of the generator.



5. Connect the battery lead to the back of the generator.

Tighten
Tighten to battery terminal B+ nut to 18 N·m (13 lb ft).

6. Connect the negative battery cable.

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