GM Service Manual Online
For 1990-2009 cars only

Generator Replacement LY7

Removal Procedure


    Object Number: 887703  Size: SH
  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  2. Remove the drive belt from the generator. Refer to Drive Belt Removal.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  4. Disconnect the electrical connector (1) from the generator.
  5. Reposition the protective boot from the generator output battery terminal for access.
  6. Remove the generator output BAT terminal nut (3) and disconnect the battery positive lead (2) from the generator.

  7. Object Number: 887706  Size: SH
  8. Remove the lower generator bolts.
  9. Lower the vehicle.
  10. Remove the upper generator bolts.
  11. Remove the generator from the engine.

Installation Procedure

  1. Install the generator to the engine.
  2. Install the upper generator bolts.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  4. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 887706  Size: SH
  5. Install the lower generator bolts and tighten to 46 N·m (36 lb ft).

  6. Object Number: 887703  Size: SH
  7. Install the battery positive lead (2) and the generator BAT terminal nut (3) to the generator and tighten to 13 N·m (115 lb in).
  8. Install the BAT terminal boot.
  9. Connect the electrical connector (1) to the generator.
  10. Lower the vehicle.
  11. Install the drive belt to the generator. Refer to Drive Belt Installation.
  12. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.

Generator Replacement LH2 w/AWD

Removal Procedure


    Object Number: 887719  Size: SH
  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  2. Remove the generator drive belt. Refer to Drive Belt Removal.
  3. Remove the upper generator mounting bolts (1, 3).
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  5. Remove the front air deflector. Refer to Front Air Deflector Replacement.
  6. Cut the tie strap securing the wiring harness to the generator.

  7. Object Number: 887723  Size: SH
  8. Remove the lower generator mounting bolt.
  9. Lift the generator off of the mounting bracket in order to gain access to the connector and the generator output BAT terminal nut.
  10. Disconnect the wire harness electrical connector from the generator.
  11. Reposition the protective boot from the generator output battery terminal for access.
  12. Remove the generator output battery terminal nut and disconnect the battery positive lead from the generator.
  13. Remove the generator from the vehicle.

Installation Procedure

  1. Position the generator near the installed position.
  2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 887723  Size: SH
  3. Connect the battery positive lead to the generator then install the generator output battery terminal nut and tighten to 10 N·m (89 lb in).
  4. Press the protective boot on to the generator output BAT terminal.
  5. Connect the wiring harness connector to the generator.
  6. Position the generator to the generator bracket on the engine.
  7. Install the lower generator bolt, but do not tighten at this time.

  8. Object Number: 887719  Size: SH
  9. Lower the vehicle.
  10. Install the upper generator bolts in the sequence shown and tighten to 50 N·m (37 lb ft).
  11. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

  12. Object Number: 874639  Size: SH
  13. Install a new tie strap to secure the wiring harness to the generator.
  14. Install the front air deflector. Refer to Front Air Deflector Replacement.
  15. Lower the vehicle.
  16. Install the generator drive belt. Refer to Generator Drive Belt Replacement.
  17. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.

Generator Replacement LH2 w/RWD

Removal Procedure


    Object Number: 887719  Size: SH
  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  2. Remove the generator drive belt. Refer to Generator Drive Belt Replacement.
  3. Remove the upper generator mounting bolts (1, 3).
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  5. Remove the front air deflector. Refer to Front Air Deflector Replacement.
  6. Cut the tie strap securing the wiring harness to the generator.

  7. Object Number: 887723  Size: SH
  8. Remove the lower generator mounting bolt.
  9. Lift the generator off of the mounting bracket in order to gain access to the connector and the generator output BAT terminal nut.
  10. Disconnect the wire harness electrical connector from the generator.
  11. Reposition the protective boot from the generator output battery terminal for access.
  12. Remove the generator output battery terminal nut and disconnect the battery positive lead from the generator.
  13. Remove the generator from the vehicle.

Installation Procedure

  1. Position the generator near the installed position.
  2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 887723  Size: SH
  3. Connect the battery positive lead to the generator then install the generator output battery terminal nut and tighten to 10 N·m (89 lb in).
  4. Press the protective boot on to the generator output BAT terminal.
  5. Connect the wiring harness connector to the generator.
  6. Position the generator to the generator bracket on the engine.
  7. Install the lower generator bolt, but do not tighten at this time.

  8. Object Number: 887719  Size: SH
  9. Lower the vehicle.
  10. Install the upper generator bolts in the sequence shown and tighten to 50 N·m (37 lb ft).
  11. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  12. Install a new tie strap to secure the wiring harness to the generator.
  13. Install the front air deflector. Refer to Front Air Deflector Replacement.
  14. Lower the vehicle.
  15. Install the generator drive belt. Refer to Generator Drive Belt Replacement.
  16. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.