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:
Dual Tone Multi-Frequency (DTMF) Tones
The in—vehicle Bluetooth system can send numbers during a call. This is used
when calling a menu—driven phone system.
1. Turn or press the MENU/ SELECT knob and select Enter Number.
2. Enter the ...
When to Check and Change Automatic Transmission Fluid
It is usually not necessary to check the transmission fluid level. The only reason
for fluid loss is a transmission leak or overheating the transmission. If a small
leak is suspected, then use the ...
Vehicle and Power Issues
OnStar services require a vehicle
electrical system, wireless service,
and GPS satellite technologies to be
available and operating for features
to function properly. These systems
may not o ...