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:
Calling for Assistance
When calling Roadside Assistance, have the following information ready:
• Your name, home address, and home telephone number
• Telephone number of your location
• Location of the vehicle
• ...
Clock
To set the time:
1. Press the CONFIG button to enter the menu options. Turn the TUNE/MENU knob
to scroll through the available setup features. Press the TUNE/MENU knob or press
the Time screen bu ...
Using the “Delete All Name Tags” Command
This command deletes all stored name tags in the Hands-Free Calling Directory and the OnStar Turn-by-Turn Destinations Directory, if equipped.
To delete all name tags:
1. Press and hold for two sec ...