GM Service Manual Online
For 1990-2009 cars only

The generator does not require periodic lubrication. The rotor shaft is mounted on bearings. Each bearing contains a permanent grease supply. Periodically check the mounting bolts for tightness, and the drive belt tension. The drive belt is self-adjusting, within the operating limits of the tensioner. Refer to Drive Belt Tensioner Diagnosis in Engine Mechanical - 3.5L for tensioner information.

Removal Procedure

Important: Service the generator as a complete unit.

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the wiper motor module. Refer to Windshield Wiper System Module Replacement in Wipers/ Washer Systems.
  3. Rotate the engine forward. Refer to Rotating the Engine for Service Access in Engine Mechanical - 3.5L.
  4. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.5L.

  5. Object Number: 1544748  Size: SH
  6. Remove the generator battery positive nut (1) and remove the terminal.
  7. Disconnect the regulator electrical connector (2).

  8. Object Number: 1239071  Size: SH
  9. Remove the generator mounting bolts.
  10. Remove the generator.

Installation Procedure


    Object Number: 1239071  Size: SH
  1. Install the generator .
  2. Notice: Refer to Fastener Notice in the Preface section.

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


    Object Number: 1544748  Size: SH
  5. Install the terminal and generator battery positive nut (1).
  6. Tighten
    Tighten the nut to 30 N·m (22 lb ft).

  7. Connect the regulator electrical connector (2).
  8. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.5L.
  9. Position the engine into the normal location and install the engine mount strut bolts. Refer to Engine Mount Strut Replacement - Left Side and Engine Mount Strut Replacement - Right Side in Engine Mechanical - 3.5L.
  10. Install the wiper motor module. Refer to Windshield Wiper System Module Replacement in Wipers/Washer Systems.
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .