When to Check
Check your tires once a month or more.
Also, check the tire pressure of the spare tire.
See also:
Gasoline Octane
If the vehicle has the 3.9L V6 engine (VIN Code 1) or the
3.9L V6 engine (VIN Code M), use regular unleaded
gasoline with a posted octane rating of 87 or higher. If the
octane rating is less tha ...
Your Responsibility
You may need to increase the volume of your
radio to hear the OnStar® advisor. If the light next
to the OnStar® buttons is red, this means that
your system is not functioning properly and should
...
Services Not Included in
Roadside Assistance
• Impound towing caused by
violation of any laws.
• Legal fines.
• Mounting, dismounting,
or changing of snow tires,
chains, or other traction devices.
• Towing or services for vehicl ...