GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Century 🢒 Body and Accessories 🢒 Roof 🢒 Sunroof Module Assembly Replacement

Removal Procedure

    Important: A new sunroof module assembly will not have the sunroof window or sunshade as components of the new service part.

  1. The old sunroof window and sunshade will need to be installed to the new sunroof module assembly.
  2. Remove the sunroof sunshade panel. Refer to Sunroof Sunshade Replacement .
  3. Remove the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.
  4. Disconnect the sunroof harness from the body harness at the right rear pillar.
  5. Disconnect the front drain hose connections from the sunroof housing.
  6. Disconnect the rear drain hose connections from the sunroof housing.

    7. Object Number: 325161 Size: SH
  7. Remove the 4 sunroof module bracket to side rail bolts.
  8. Remove the 6 sunroof module to roof bolts.
  9. Remove the sunroof module at the actuator bracket bolt (center rear).

    10. Important: Use two white nylon locator pins in order to correctly position the sunroof module and temporarily hold the module in place.

  10. Squeeze the locator pins and pull down on the sunroof module to disengage the two locator/retainers.
  11. Remove the sunroof module from the vehicle through the door opening.

Installation Procedure

    Object Number: 325161 Size: SH
  1. Position the sunroof module in the vehicle. Press up to install the two white nylon locator/retainers.

    2. 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.

  2. Install the sunroof module actuator bracket bolt.

    3. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  3. Install the 6  sunroof module to roof bolts.

    4. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  4. Install the 4 sunroof module bracket to side rail bolts.

    5. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  5. Connect the front and rear drain hoses to the sunroof housing.

    6. Object Number: 640195 Size: SH
  6. Properly route the rear hoses in the metal roof slot and tape the hoses in place.
  7. Connect the sunroof harness to the body harness at the right rear pillar.
  8. Install the sunroof sunshade panel. Refer to Sunroof Sunshade Replacement .
  9. Temporarily install the power sunroof switch and check the operation of the sunroof.
  10. Install the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.