OnStar Services

See also:

Exterior
The ATS looks good on the road. You never can tell for sure at an auto show, where I thought the headlights were too slit-like, and I wasn't sure about the hump in the trunk lid, accented as it is ...

Tire Pressure Light
For vehicles with the Tire Pressure Monitor System (TPMS), this light comes on briefly when the engine is started. It provides information about tire pressures and the TPMS. ...

Folding the Seatback
To fold the seatback: 1. Open the liftgate to access the controls for the seat. 2. Remove all items on the seat cushion. Notice: Folding a rear seat with the safety belts still fastened may cause d ...