GM Service Manual Online
For 1990-2009 cars only

Generator Replacement Gasoline Engines

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1375417  Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the serpentine accessory drive belt by lowering the vehicle and turning the automatic tensioner roller bolt clockwise to relieve tension on the belt. Refer to Drive Belt Replacement .

  3. Object Number: 1375489  Size: SH
  4. Disconnect the harness connector form the back of the generator, and the generator lead to the battery.

  5. Object Number: 1375490  Size: SH
  6. Carefully remove the generator with the bolts.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1375490  Size: SH
  1. Install the generator to the generator bracket and insert the generator bolt.
  2. Tighten

        • Tighten the generator bracket upper bolt to 35 N·m (26 lb ft).
        • Tighten the generator bracket lower bolt to 40 N·m (30 lb ft).

    Object Number: 1375489  Size: SH
  3. Connect the harness connector to the back of the generator, and the generator lead to the battery.

  4. Object Number: 1375417  Size: SH
  5. Route the serpentine accessory drive belt. Refer to Drive Belt Replacement .
  6. Relieve tension on the belt by first applying downward pressure on the automatic tension roller bolt and releasing pressure once the belt is in place.
  7. Connect the negative battery cable.

Generator Replacement Diesel Engine

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1863838  Size: SH
  1. Disconnect the battery negative cable.
  2. Remove the engine cover. Refer to Engine Cover Replacement .
  3. Remove the charge air cooler inlet hoses. Refer to Charge Air Cooler Inlet Pipe and Outlet Pipe Replacement .

  4. Object Number: 1821742  Size: SH
  5. Remove the accessory belt. Refer to Drive Belt Replacement .

  6. Object Number: 1821743  Size: SH
  7. Disconnect the generator connector.
  8. Remove the generator B+ wiring harness.
  9. Remove the generator.

Installation Procedure


    Object Number: 1821743  Size: SH
  1. Install the generator.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the generator lead-to-starter motor wire retaining nut.
  4. Tighten

        • Tighten the generator bolt to 30 N·m (22.1  lb ft).
        • Tighten the generator B+ wiring harness retaining nut to 25 N·m (18.4 lb ft).

    Object Number: 1821742  Size: SH
  5. Install the accessory drive belt. Refer to Drive Belt Replacement.

  6. Object Number: 1863838  Size: SH
  7. Install the charge air cooler inlet hoses. Refer to Charge Air Cooler Inlet Pipe and Outlet Pipe Replacement.
  8. Install the engine cover. Refer to Engine Cover Replacement.
  9. Connect the negative battery cable.