GM Service Manual Online
For 1990-2009 cars only

Sunroof Track Timing/Synchronization Extended Cab

Removal Procedure

  1. Place the module in the full open position.
  2. It is only necessary to lower the headliner. Only do those step in headliner replacement that will lower the headliner enough to gain access to the part. Refer to Headlining Trim Panel Replacement .
  3. Disconnect the electrical connector from the motor/actuator.
  4. Remove the motor/actuator. Refer to Sunroof Motor/Actuator Replacement .
  5. Push the window guides rearward on the track until the guides are positioned against the rear hard stop.

Installation Procedure

  1. Install the motor/actuator . Refer to Sunroof Motor/Actuator Replacement .
  2. Connect the electrical connector to the motor/actuator.
  3. Install the headliner. Refer to Headlining Trim Panel Replacement .
  4. Perform the Initialization/Teach Procedure. Refer to Sunroof Motor/Actuator Initialization/Teach Process .
  5. Verify the operation of the sunroof.

Sunroof Track Timing/Synchronization Crew Cab

Removal Procedure

  1. Place the module in the closed/flush position.
  2. Remove the sunroof window. Sunroof Window Replacement .
  3. It is only necessary to lower the headliner. Only do those step in headliner replacement that will lower the headliner enough to gain access to the part. Refer to Headlining Trim Panel Replacement .
  4. Disconnect the electrical connector from the motor/actuator.
  5. Remove the motor/actuator. Refer to Sunroof Motor/Actuator Replacement .

  6. Object Number: 1549379  Size: SH
  7. Push the cam assembly (2) forward until the timing hole (3) in the cam is aligned with the timing hole (4) in the lifter arm (1).

  8. Object Number: 1549380  Size: SH
  9. Insert a pin (1) in the holes to hold the position while installing the drive motor.
  10. Important: Both mechanisms should now be in the closed position.

  11. Repeat this procedure for the opposite side.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.

  1. Install the sunroof window. Refer to Sunroof Window Replacement .
  2. Tighten
    Tighten the screws to 4 N·m (35 lb in).

  3. Install the motor/actuator. Refer to Sunroof Motor/Actuator Replacement .
  4. Tighten
    Tighten the motor attachment screws to 3.5 N·m (31 lb in).

  5. Connect the electrical connector to the motor/actuator.

  6. Object Number: 1549380  Size: SH
  7. Remove the pin (1) from the holes that held the position while installing the drive motor.
  8. Install the headliner. Refer to Headlining Trim Panel Replacement .
  9. Perform the Initialization/Teach Procedure. Refer to Sunroof Motor/Actuator Initialization/Teach Process .
  10. Verify the operation of the sunroof.