OnStar Services

See also:

High-Beam On Light
The high–beam on light comes on when the high-beam headlamps are in use. See Headlamp High/Low-Beam Changer for more information. ...

Tire Pressure
Tires need the correct amount of air pressure to operate effectively. Notice: Neither tire underinflation nor overinflation is good. Underinflated tires, or tires that do not have enough a ...

Passing
More passing distance is needed when towing a trailer. Because the rig is longer, it is necessary to go farther beyond the passed vehicle before returning to the lane. ...