See also:

Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can be obtained from your dealer. ...

Hands-Free Calling
1. Push . System responds: “OnStar ready.”. 2. Say “Dial.” System responds: “Please say the name or number to call.”. 3. Say the entire number without pausing, including a “1” ...

Changing a Tire When Trailer Towing
If the vehicle gets a flat tire while towing a trailer, be sure to secure the trailer and disconnect it from the vehicle before changing the tire. ...