GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Body Front End 🢒 Auxiliary Generator Replacement

Removal Procedure

    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 battery negative 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 upper fan shroud if necessary. Refer to Fan Shroud Replacement in Engine Cooling.
  5. Remove the drive belt from the generator. Refer to Drive Belt Replacement , in Engine Mechanical (5.0L and 5.7L), Drive Belt Replacement , in Engine Mechanical (6.5L), or Drive Belt Replacement , in Engine Mechanical (7.0L and 7.4L).
  6. Remove the auxiliary brace bolts. Refer to Generator Brace Replacement - Auxiliary .
  7. Remove the remaining generator bracket bolts.

    8. Object Number: 388602 Size: SH
  8. Lift the hose from the generator support.
  9. Remove the generator.

Installation Procedure
  1. Install the generator.

    2. Object Number: 388602 Size: SH

    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 bracket bolts.

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

  3. Install the auxiliary brace bolts. Refer to Generator Brace Replacement - Auxiliary .
  4. Place the hose on the generator support.
  5. Install the drive belt to the generator. Refer to Drive Belt Replacement , in Engine Mechanical (5.0L and 5.7L), Drive Belt Replacement , in Engine Mechanical (6.5L), or Drive Belt Replacement , in Engine Mechanical (7.0L and 7.4L).
  6. Install the upper fan shroud if necessary. Refer to Fan Shroud Replacement in Engine Cooling.
  7. Connect the battery lead to the back of the generator.

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

  8. Connect the terminal plug from the back of the generator.
  9. Connect the battery negative cable.