GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Lucerne 🢒 Body 🢒 Roof 🢒 Sunroof Module Assembly Replacement

Removal Procedure

    Important: A new sunroof module assembly will not have the sunroof window, sunshade, deflector and motor/actuator as components of the new service part. The old sunroof components will need to be transferred to the new sunroof module assembly.

    The old sunroof window and sunshade will need to be installed to the new sunroof module assembly.


    Object Number: 1542792 Size: SH
  1. Remove the sunroof window. Refer to Sunroof Window Replacement .
  2. Remove the sunshade panel. Refer to Sunroof Sunshade Replacement .
  3. Remove the air deflector. Refer to Sunroof Air Deflector Replacement .

    4. Important: It is only necessary to lower the headliner. Only do the steps in headliner replacement that will lower the headliner enough to gain access.

  4. Lower the headliner. Refer to Headlining Trim Panel Replacement .
  5. Remove the sunroof motor/actuator. Refer to Sunroof Motor/Actuator Replacement .
  6. Cut the tie straps securing the electrical harness to the sunroof cable rear drive tube.

    7. Object Number: 758127 Size: SH
  7. Disconnect the drain hoses from the front sunroof module drain spouts (1).

    8. Object Number: 758133 Size: SH
  8. Disconnect the drain hoses from the rear sunroof module drain spouts.

    9. Object Number: 776057 Size: SH
  9. Remove the sunroof module to the roof bolts (1).
  10. Remove the 2 center, side to side, bolts last in order to help support the sunroof module to the roof ring.
  11. Remove the last 2 sunroof to roof ring bolts.
  12. With an assistant, lower and remove the sunroof module assembly out the passenger side door.

Installation Procedure

    Object Number: 776057 Size: SH
  1. With an assistant, position the new sunroof module assembly into the alignment pins (2) located on the roof ring.
  2. Hand start the 2 center, side to side, sunroof module assembly to roof bolts (1) in order to hold the sunroof module into place.
  3. Finger tighten the 2 center bolts.

    4. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the remaining sunroof module to roof bolts.

    5. Tighten
    Tighten all of the bolts to 9 N·m (80 lb in).


    Object Number: 758127 Size: SH
  5. Connect the front and rear drain hoses to the drain spouts (1) on the sunroof module.

    6. Object Number: 1542792 Size: SH
  6. Install sunroof motor/actuator to the module.
  7. Install the screws to the motor/actuator.

    8. Tighten
    Tighten all of the bolts to 6 N·m (53 lb in).

  8. Connect the electrical connector to the sunroof motor/actuator.
  9. Secure the harness with suitable straps.
  10. Install the air deflector. Refer to Sunroof Air Deflector Replacement .
  11. Install the sunshade. Refer to Sunroof Sunshade Replacement .
  12. Install the sunroof window and loosely install the screws. Refer to Sunroof Window Replacement .
  13. Adjust the sunroof window. Refer to Sunroof Window Height and Opening Fit Adjustment .
  14. Verify the proper operation of the sunroof before securing the headliner.
  15. Initilization/Teach the sunroof motor. Refer to Sunroof Motor/Actuator Initialization/Teach Process .
  16. Raise and install the headliner, with the aid of an assistant. Refer to Headlining Trim Panel Replacement .