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:
Some Other Rainy Weather Tips
• Besides slowing down, allow some extra
following distance. And be especially careful
when you pass another vehicle. Allow yourself
more clear room ahead, and be prepared to
have your view rest ...
Tilt Wheel
The steering wheel should be adjusted before you
drive.
The tilt lever is located
to the left of the steering
column, under the
turn signal lever.
It can be raised to the highest level to give ...
Using Voice Commands
During a Planned Route
Cancel Route
1. Push . System responds:
“OnStar ready,” then a tone. Say
“Cancel route.” System
responds: “Would you like to
cancel route directions to your
destination?”.
2. Sa ...