OnStar Services

See also:

Checking Coolant
The vehicle must be on a level surface when checking the coolant level. Check to see if coolant is visible in the coolant surge tank. If the coolant inside the coolant surge tank is boiling, do not ...

Storing the Compact Spare Tire and Tools
Reverse the instructions for removing the spare tire and tools to store the compact spare tire. ...

Cruise Control
CTS Shown, CTS–V Similar The cruise control buttons are located on the left side of the steering wheel. : Press to turn the system on or off. The indicator light on the button turns on wh ...