Phone

See also:

Windshield Washer
Pull the windshield wiper lever toward you to spray windshield washer fluid and activate the wipers. The washer and wipers will continue until the lever is released or the maximum wash time i ...

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 the v ...

Control of a Vehicle
You have three systems that make your vehicle go where you want it to go. They are the brakes, the steering, and the accelerator. All three systems have to do their work at the places where the ...