GM Service Manual Online
For 1990-2009 cars only

Generator Replacement LZ4

Removal Procedure

  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the drive belt. Refer to Drive Belt Replacement .

  3. Object Number: 1877405  Size: SH
  4. Reposition the generator terminal protective boot (1).
  5. Remove the generator terminal nut (4).
  6. Remove the engine harness terminal (3) from the generator.
  7. Disconnect the generator electrical connector (2).

  8. Object Number: 1877404  Size: SH
  9. Remove the generator pivot bolt (1).
  10. Remove the generator bolt (2).
  11. Remove the generator stud (3).
  12. Remove the generator (4) from the vehicle.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1877404  Size: SH
  1. Install the generator (4) to the vehicle.
  2. Important: Hand start all bolts before finalizing any torques.

  3. Install the generator stud (3).
  4. Tighten
    Tighten the stud to 50 N·m (37 lb ft).

  5. Install the generator bolt (2).
  6. Tighten
    Tighten the bolt to 50 N·m (37 lb ft).

  7. Install the generator pivot bolt (1).
  8. Tighten
    Tighten the bolt to 50 N·m (37 lb ft).


    Object Number: 1877405  Size: SH
  9. Connect the generator electrical connector (2).
  10. Install the engine harness terminal (3) to the generator.
  11. Install the generator terminal nut (4).
  12. Tighten
    Tighten the nut to 15 N·m (11 lb ft).

  13. Position the generator terminal protective boot (1).
  14. Install the drive belt. Refer to Drive Belt Replacement .
  15. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .

Generator Replacement LE5

Removal Procedure

  1. Disconnect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the drive belt. Refer to Drive Belt Replacement .

  3. Object Number: 1647528  Size: SH
  4. Disconnect the generator electrical connector (3).

  5. Object Number: 1656132  Size: SH
  6. Reposition the generator terminal protective boot (3).
  7. Remove the generator terminal nut (2).
  8. Remove the engine harness terminal (1) from the generator.

  9. Object Number: 1650517  Size: SH
  10. Remove the generator bolts.
  11. Remove the generator from the vehicle.

Installation Procedure

  1. Position the generator to the vehicle.
  2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1650517  Size: SH
  3. Install the generator bolts.
  4. Tighten
    Tighten the bolts to 22 N·m (16 lb ft).


    Object Number: 1656132  Size: SH
  5. Install the engine harness terminal (1) to the generator.
  6. Install the generator terminal nut (2).
  7. Tighten
    Tighten the nut to 15 N·m (11 lb ft).

  8. Position the generator terminal protective boot (3).

  9. Object Number: 1647528  Size: SH
  10. Connect the generator electrical connector (3).
  11. Install the drive belt. Refer to Drive Belt Replacement .
  12. Connect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .

Generator Replacement LY7

Removal Procedure


    Object Number: 1888716  Size: SH
  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the drive belt. Refer to Drive Belt Replacement .
  3. Disconnect the engine wiring harness electrical connector (5) from the generator.
  4. Reposition the engine wiring harness boot (6).
  5. Remove the generator terminal nut (4).
  6. Remove the engine harness terminal from the generator.

  7. Object Number: 1889301  Size: SH
  8. Loosen the idler pulley bolt (4).
  9. Remove the generator bolts (1).
  10. Separate the generator from the engine block.
  11. Remove the idler pulley (3) from the vehicle.
  12. Important: It may be necessary to maneuver the generator around in the engine compartment to in order to remove it from the vehicle.

  13. Remove the generator (2) from the vehicle.

Installation Procedure


    Object Number: 1889301  Size: SH

    Important: It may be necessary to maneuver the generator around in the engine compartment to in order to install it to the vehicle.

  1. Install the generator (2) to the vehicle.
  2. Install the idler pulley (3) to the vehicle.
  3. Position the generator (2) and idler pulley to the engine block.
  4. Install the idler pulley bolt (4) and generator bolts (1) finger tight.
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. Tighten the idler pulley bolt first, then the generator bolts.
  7. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).


    Object Number: 1888716  Size: SH
  8. Install the engine harness terminal to the generator.
  9. Install the generator terminal nut (4).
  10. Tighten
    Tighten the nut to 10 N·m (89 lb in).

  11. Position the engine wiring harness boot (6) over the terminal.
  12. Connect the engine wiring harness electrical connector (5) to the generator.
  13. Install the drive belt. Refer to Drive Belt Replacement .
  14. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .