GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Park Avenue 🢒 Body and Accessories 🢒 Roof 🢒 Power Sunroof System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the ignition switch to RUN.
  2. Slide the sunroof switch backward. Release the sunroof switch before the sunroof is opens fully.

In order to abort the express open mode, move the sunroof switch once in any direction.

The power sunroof moves smoothly to the fully-open position.

Power Sunroof Does Not Open

2
  1. Slide the sunroof switch forward.
  2. Release the sunroof switch before the sunroof is closed fully.
    • The sunroof moves toward the closed position.
    • The sunroof stops when the sunroof switch is released.

Power Sunroof Does Not Open

3

Slide forward and hold the sunroof switch.
    • The power sunroof moves to the fully-closed position.
    • The power sunroof stops.

Power Sunroof Does Not Open

4

Push the sunroof switch up.

The power sunroof moves to the vent open position.

Power Sunroof Does Not Open to Vent Position

5
  1. Pull the sunroof switch down.
  2. Release the sunroof switch before the power sunroof closes fully.
    • The power sunroof moves to the fully-closed position.
    • The power sunroof stops.

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6
  1. Close all vehicle doors.
  2. Turn the ignition switch to OFF.
  3. Operate the sunroof, power windows and radio.
  4. Wait 10 minutes, then attempt to operate the sunroof, power windows and radio.
    • The sunroof, power windows and radio operate for up to 10 minutes after the ignition switch is turned to OFF. (Retained accessory power is active.)
    • The vehicle disables the sunroof, power windows and radio after 10 minutes.

Refer to Retained Accessory Power (RAP) System Check in Retained Accessory Power

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.