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.” System re ...
Locking Rear Axle
Vehicles with a locking rear axle can give more traction on snow, mud, ice, sand,
or gravel. It works like a standard axle most of the time, but when traction is
low, this feature will allow the r ...
Antilock Brake System (ABS) Warning Light
For vehicles with the Antilock Brake System (ABS), this light comes on briefly
when the engine is started.
If it does not, have the vehicle serviced by your dealer. If the system is working
nor ...