Engine Oil Additives
Do not add anything to the oil. The recommended oils with the starburst symbol that meet GM Standard GM6094M are all you will need for good performance and engine protection.
See also:
Warranty
OnStar equipment may be
warranted as part of the new-vehicle
limited warranty. The manufacturer
of the vehicle furnishes detailed
warranty information. ...
To Use the Engine Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord. The electrical cord is located
on the passenger side of the engine compartment, near the air cleaner.
3. Plug it into a n ...
Roadside Assistance Program
For U.S. purchased vehicles, call 1-800-252-1112;
(Text Telephone (TTY): 1-888-889-2438).
For Canadian purchased vehicles, call 1-800-268-6800.
Service is available 24 hours a day, 365 days a year ...