OnStar Services

See also:

Pulling a Trailer
Here are some important points: . There are many laws, including speed limit restrictions that apply to trailering. Check for legal requirements with state or provincial police. . Do not t ...

Automatic Transmission Shift Lock Control Function Check
WARNING! When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured. 1. Before starting this check, be sure there is enough r ...

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 ...