Fuel
For diesel engine vehicles, see “Fuel for Diesel Engines” in the Duramax Diesel Supplement.
For Vehicles with gasoline engines, please read this.
See also:
Instrument Panel Illumination Control
This control is located on the instrument panel, to the left of the steering
column.
(Instrument Panel Brightness): Turn
clockwise or counterclockwise to brighten or dim the lights. ...
Belts
• Belts may need replacing if they squeak or show signs of cracking or splitting.
• Trained dealer technicians can inspect the belts and recommend replacement when necessary. ...
Place a Call Using a Stored Number
1. Push . System responds: “OnStar
ready.”
2. Say “Call <name tag>.” System responds: “OK, calling <name tag>.”
Verify Minutes and Expiration
Push and say “minutes” t ...