OnStar Services

See also:

Sunroof
If your vehicle has a power sunroof, the switches are located on the headliner. To express-open the sunroof press the rear of the driver’s side switch to the second detent position, and rel ...

QuietTuned for silent ride, comfort
Like all other Buick models, Terraza benefits from QuietTuning, a comprehensive engineering program throughout the entire vehicle to ensure a silent ride. This includes new engine isolation measur ...

Add-On Electrical Equipment
Notice: Do not add anything electrical to the vehicle unless you check with your dealer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the v ...