OnStar Services

See also:

Uniform Tire Quality Grading
Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: Treadwear 200 Traction AA Temperature A The following information rel ...

Menu System (Radio with CD)
The Menu system for the uplevel infotainment system appears on the display screen. Controls The TUNE/MENU knob and BACK are used to navigate the menu system. TUNE/MENU: Press to: Enter the ...

SERVICE BRAKE ASSIST
This message may be displayed when there is a problem with the brake boost assist system. When this message is displayed, the brake boost assist motor might be heard operating and you might ...