See also:

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if ...

Air Vents
Use the louvers located on the air vents to change the direction of the airflow. To open the vent, move the thumbwheel to . To close the vent, move the thumbwheel to . For vehicles with eAss ...

Towing a Trailer
CAUTION: If you do not use the correct equipment and drive properly, you can lose control when you pull a trailer. For example, if the trailer is too heavy, the brakes may not work well — or ...