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 driving. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. If heavy knocking is heard when using gasoline rated at 87 octane or higher, the engine needs service.
See also:
Touch Screen Buttons
Touch screen buttons are on the screen and highlighted when a feature is available.
Some screen buttons highlight when active and gray out when inactive. ...
Storing Name Tags
The system can store up to thirty phone numbers as
name tags that are shared between the Bluetooth and
OnStar systems.
The system uses the following commands to store and
retrieve phone numbers ...
Belts
• Belts may need replacing if they
squeak or show signs of
cracking or splitting.
• Trained dealer technicians
can inspect the belts and
recommend replacement when
necessary. ...