Wheel Alignment and Tire Balance
The tires and wheels were aligned and balanced at the factory to provide the longest tire life and best overall performance.
Adjustments to wheel alignment and tire balancing will not be necessary on a regular basis. However, check the alignment if there is unusual tire wear or if the vehicle is pulling to one side or the other. If the vehicle vibrates when driving on a smooth road, the tires and wheels might need to be rebalanced. See your dealer for proper diagnosis.
See also:
Voice Recognition
The navigation system's voice recognition allows for hands-free operation of
the navigation system, audio system, and OnStar (if equipped) features.
Voice recognition can be used when the ignit ...
Twilight Sentinel
This feature automatically turns the lamps on and off. A light sensor on top
of the instrument panel makes the Twilight Sentinel® work, so be sure it is not
covered.
With Twilight Sentinel th ...
Recommended Fuel
Use regular unleaded gasoline with a posted octane rating of 87 or higher.
If the octane rating is less than 87, an audible knocking noise, commonly
referred to as spark knock, might be heard when d ...