OnStar Services

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 the v ...

Windshield Wiper/Washer
Sedan and Coupe Model Shown Wagon Model Shown The windshield wiper lever is on the right side of the steering column. Move the windshield wiper lever to select the wiper speed. (Mist): Si ...

Manual Transmission
Skip Shift (CTS–V) Under light acceleration, the transmission will only allow shifting from 1 (First) to 4 (Fourth). This helps improve fuel mileage. Under harder acceleration, Skip Shift is ...