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:
Trailer Towing
If the vehicle is a hybrid, see the hybrid supplement for more information.
Do not tow a trailer during break-in. See New Vehicle Break-In for
more information.
WARNING
The drive ...
Hill Start Assist (HSA)
Non-hybrid vehicles with StabiliTrak have a Hill Start Assist (HSA) feature,
which may be useful when the vehicle is stopped on a grade. This feature is designed
to prevent the vehicle from rollin ...
Leaving After Parking on a Hill
1. Apply and hold the brake pedal while you:
- Start the engine.
- Shift into a gear.
- Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of ...