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:
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. Say “Yes.” Syst ...
Voice Recognition
The voice recognition system uses commands to control the system and dial
phone numbers.
Noise: The system may not recognize voice commands if there is too much
background noise.
When to Speak ...
Tire Rotation
Tires should be rotated every 12 000 km (7,500 mi). See Maintenance Schedule
.
Tires are rotated to achieve a uniform wear for all tires. The first rotation
is the most important.
Any time ...