Onstar.com
The website provides access to account information, manages the OnStar subscription, and allows viewing of videos of each service.
Get subscription plan pricing and sign up for OnStar Vehicle Diagnostics. Click on the “My Account” tab on the home page.
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 ...
Interior
Seven occupants fit inside the Terraza. The seats have contrasting-colored
piping. The CX's seats have cloth inserts with leather bolsters in the first two
rows, and the CXL gets leather seats. Th ...
Horn
Press on the steering wheel
pad to sound the horn. ...