OnStar Services

See also:

Ride Quality
The ATS' ride quality is confident and comfortable. A difference of 1 inch in wheel diameter isn't always noticeable, but I found the 2.5L with its 17-inch wheels to ride a little softer than the ...

Flash-to-Pass
This feature allows the high-beam headlamps to be used to signal the driver in front of you that you want to pass. Pull and hold the turn signal/lane change lever toward you to use this fea ...

Brake Adjustment
Every time the brakes are applied, with or without the vehicle moving, the brakes adjust for wear. ...