roof rack BUICK CENTURY 1999 Owner's Manual

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See ªRetained Accessory Powerº in the Index. The
control switch is located overhead on the headliner.
To open the astroroof, push the rear (indented part)
of the switch once and the astroroof will open to the
vent position only. You will need to open the sunshade
by hand.
Push the rear of the switch a second time and the
astroroof and sunshade will will open by themselves.
This is the express
-open feature.To close the astroroof, push and hold the front of the
switch until the sunroof motor stops. The sunshade can
only be closed by hand.
OnStar (Option)
Your vehicle's electrical wiring will accommodate
dealer installation of OnStar. The following services are
available 24 hours a day:

Emergency Services Button

Roadside Service with Location

Automatic Notification of Air Bag Deployment

Stolen
-Vehicle Tracking

Remote Door Unlock

Hands
-Free, Voice Activated Cellular Telephone

Concierge/Customer Conveniences Services

Remote Diagnostics

And much more.
For more information, contact your dealer.