Unable to Connect to OnStar Message
If there is limited cellular coverage or the cellular network has reached maximum capacity, this message may come on. Push 
to try the call again or try again after driving a few miles into another cellular area.
See also:
GMC Terrain in the Market
With the Equinox and Terrain, GM stands to regain some lost share in the
crossover market — if for no other reason than 32 mpg in an SUV is no small
feat. The Terrain is competitive otherwise, b ...
Adjusting the Speakers (Balance/Fade) (AM-FM Radio and AM-FM Radio with CD)
To adjust the balance or fade:
1. Press or press the
knob until the speaker control label displays.
2. To adjust the setting, do one of the following:
• Turn the knob.
• Press either SEEK ...
Cellular Phone Usage
Cellular phone usage can cause interference with the vehicle's radio. ...