See also:

Compass Variance
Compass variance is the difference between earth’s magnetic north and true geographic north. The mirror is set to zone eight upon leaving the factory. It will be necessary to adjust the compass ...

Setting the Clock (Radio with CD and Touchscreen)
The clock is in the center stack display. To set the time: 1. Press the CONFIG button to enter the menu options or press . Turn the TUNE/MENU knob to scroll through the available setup features. ...

Reporting Safety Defects to General Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, please notify General Motors. Call 1-800-521-7300, or write: Buick Customer Assistance Center P.O. Box 33136 ...