GM Service Manual Online
For 1990-2009 cars only

Sunroof Motor/Actuator Replacement PES

Removal Procedure

    Important: The sunroof actuator drive shaft turns in both directions and contains no limit switches. The sunroof actuator may be replaced with the window panel in any position.

  1. Remove the headliner. Refer to Headlining Trim Panel Replacement.

  2. Object Number: 594492  Size: SH
  3. Remove the tie strap from the wiring harness.
  4. Remove the screws from the sunroof motor/actuator (1).
  5. Disconnect the electrical connector from the wiring harness.
  6. Pull straight down to disengage the drive gear from the sunroof opening positioning switch (SOPS).
  7. Remove the sunroof motor/actuator from the sunroof module.

Installation Procedure


    Object Number: 594492  Size: SH
  1. Position the sunroof motor/actuator to the sunroof module.
  2. Connect the electrical connector to the wiring harness.
  3. Push the sunroof motor/actuator straight in to engage its drive gear into the SOPS.
  4. 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.

  5. Install the sunroof motor/actuator screws (1) to the sunroof motor/actuator.
  6. Tighten
    Tighten the sunroof motor/actuator screws to 3 N·m (27 lb in).

  7. Install the tie strap to the wiring harness (2).
  8. Inspect the operation of the sunroof module.
  9. Install the headliner. Refer to Headlining Trim Panel Replacement.
  10. Refer to Control Module References for programming and setup information.

Sunroof Motor/Actuator Replacement MD4

Removal Procedure

    Important: The sunroof actuator drive shaft turns in both directions and contains no limit switches. The sunroof actuator may be replaced with the window panel in any position.

  1. Remove the headliner. Refer to Headlining Trim Panel Replacement.

  2. Object Number: 1542792  Size: SH
  3. Remove the tie strap from the wiring harness.
  4. Remove the screws from the sunroof motor/actuator (1).
  5. Disconnect the electrical connector from the wiring harness.
  6. Pull straight down to disengage the drive gear from the sunroof opening positioning switch (SOPS).
  7. Remove the sunroof motor/actuator from the sunroof module.

Installation Procedure


    Object Number: 1542792  Size: SH
  1. Position the sunroof motor/actuator to the sunroof module.
  2. Connect the electrical connector to the wiring harness.
  3. Push the sunroof motor/actuator straight in to engage its drive gear into the SOPS.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the sunroof actuator screws (1) to the sunroof actuator.
  6. Tighten
    Tighten the sunroof actuator screws to 3 N·m (27 lb in).

  7. Install the tie strap to the wiring harness (2).
  8. Perform the Initialization/Teach Procedure. Refer to Sunroof Motor/Actuator Initialization/Teach Process.
  9. Inspect the operation of the sunroof module.
  10. Install the headliner. Refer to Headlining Trim Panel Replacement.
  11. Refer to Control Module References for programming and setup information.