GM Service Manual Online
For 1990-2009 cars only

Generator Replacement L26

Removal Procedure


    Object Number: 302324  Size: MH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the drive belt from the generator. Refer to Drive Belt Replacement .
  3. Remove the generator rear brace. Refer to Generator Brace Replacement .
  4. Remove the bolts (1, 3) and the stud (2) from the generator.
  5. Disconnect the electrical connector from the generator.
  6. Position aside the protective boot from the generator output BAT terminal for access.
  7. Remove the generator output BAT terminal nut and remove the positive battery lead from the generator.
  8. Remove the generator.

Installation Procedure

  1. Position the generator to the engine.

  2. Object Number: 302324  Size: MH

    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.

  3. Install the positive battery lead to the generator.
  4. Install the generator output BAT terminal nut.
  5. Tighten
    Tighten the generator output BAT terminal nut to 20 N·m (15 lb ft).

  6. Install the protective boot to the generator output BAT terminal.
  7. Connect the electrical connector to the generator.
  8. Important: Do not tighten the stud.

  9. Install the generator stud (2) to the generator bracket.
  10. Important: Do not tighten the bolts.

  11. Install the generator bolts (1, 3) to the generator bracket.
  12. Tighten the generator bolts and stud in the order described. The following is a mandatory torque sequence:
  13. Tighten

    1. Tighten the generator bolt (1) to 50 N·m (37 lb ft).
    2. Tighten the generator stud (2) to 50 N·m (37 lb ft).
    3. Tighten the generator rear bracket bolt (3) to 50 N·m (37 lb ft).
  14. Install the generator rear brace. Refer to Generator Brace Replacement .
  15. Install the drive belt. Refer to Drive Belt Replacement .
  16. Connect the negative battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .

Generator Replacement LY7

Removal Procedure

  1. Disconnect the battery ground (negative) cable from the battery. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the torque struts and rotate the engine in order to provide access to remove the generator. Refer to Engine Mount Strut Replacement - Left Side and Engine Mount Strut Replacement - Right Side .

  3. Object Number: 1394044  Size: SH
  4. Remove the generator B+ terminal nut and the battery cable from the generator.

  5. Object Number: 1394065  Size: SH
  6. Disconnect the generator electrical connector.
  7. Remove the drive belt from the generator. Refer to Drive Belt Replacement .
  8. Remove the idler pulley. Refer to Drive Belt Idler Pulley Replacement .

  9. Object Number: 1394079  Size: SH
  10. Remove the generator bolts.
  11. Remove the generator from the vehicle.

Installation Procedure


    Object Number: 1394079  Size: SH
  1. Install the generator to the vehicle.
  2. Notice: Refer to Fastener Notice in the Preface section.

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

  5. Install the idler pulley. Refer to Drive Belt Idler Pulley Replacement .
  6. Install the drive belt. Refer to Drive Belt Replacement .

  7. Object Number: 1394065  Size: SH
  8. Connect the generator electrical connector.

  9. Object Number: 1394044  Size: SH
  10. Install the battery cable and the generator B+ terminal nut to the generator.
  11. Tighten
    Tighten the generator B+ terminal nut 20 N·m (15 lb ft).

  12. Install the torque struts. Refer to Engine Mount Strut Replacement - Left Side and Engine Mount Strut Replacement - Right Side .
  13. Connect the battery ground (negative) cable to the battery. Refer to Battery Negative Cable Disconnection and Connection .

Generator Replacement LS4

Removal Procedure


    Object Number: 1552786  Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  3. Remove the drive belt. Refer to Drive Belt Replacement - Accessory .
  4. Disconnect the generator electrical connector (2).
  5. Position aside the protective boot (1) from the generator output BAT terminal for access.
  6. Remove the generator output BAT terminal nut (4) and remove the positive battery lead (3) from the generator.

  7. Object Number: 1552788  Size: SH
  8. Remove the generator bolts and generator.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1552788  Size: SH
  1. Install the generator and bolts.
  2. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).


    Object Number: 1552786  Size: SH
  3. Install the positive battery lead (3) and generator output BAT terminal nut (4) to the generator.
  4. Tighten
    Tighten the nut to 20 N·m (15 lb ft).

  5. Position the protective boot (1) to the generator output BAT terminal.
  6. Connect the generator electrical connector (2).
  7. Install the drive belt. Refer to Drive Belt Replacement - Accessory .
  8. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .