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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 253 (SUNROOF)REPAIR INSTRUCTIONSSUNROOF TRACK TIMING/SYNCHRONIZATIONREMOVAL PROCEDURE
2008 Pontiac Grand Prix Base

Removal Procedure

2008 Pontiac Grand Prix BaseSECTION Removal Procedure
WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Sunroof Motor/Actuator
    GM1841916Courtesy of GENERAL MOTORS CORP.
  1. Remove the sunroof glass panel. Refer to Sunroof Glass Panel Replacement .
  2. Remove the overhead roof console. Refer to Roof Console Replacement .
    3. IMPORTANT: If installing a new sunroof motor, or transferring one from a previous module, connect the electrical harness but DO NOT install the motor to the sunroof module at this time.
  3. Leaving the electrical harness connected (2), remove the sunroof motor (3) from the module. Refer to Power Sunroof Motor Replacement .
  4. Turn the ignition to RUN, with the engine OFF.
  5. In order to watch the sunroof motor gear turn, hold the sunroof motor with the gear on top.
  6. Press and hold the rear portion of the sunroof switch, open. The gear will turn clockwise.
  7. Repeat the previous step until the motor ignores the open request. This may need to be repeated several times.
  8. Momentarily press the front portion of the sunroof switch, close. The gear will turn counterclockwise, stopping at the closed position. The motor is now timed in the closed position.
  9. Turn the ignition to OFF, and open the driver door to disable retained accessory power.
    10. Fig 2: Manually Repositioning Sunroof Module Guide Mechanisms
    GM1939109Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.