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:
Vehicle Overview
GM says the Sierra 1500 Hybrid's gasoline V-8 and electric motors team up for
an overall mileage improvement compared with the regular Sierra. The Sierra
Hybrid is only available as a rear- or fou ...
Tire Pressure for High-Speed Operation
WARNING
Driving at high speeds, 160 km/h (100 mph) or higher, puts an additional strain on tires.
Sustained high-speed driving causes excessive heat buildup and can cause sudden tire failure.
You c ...
Starting the Engine
Move the shift lever to P (Park) or N (Neutral). The engine will not start in any other position. To restart the engine when the vehicle is already moving, use N (Neutral) only.
Notice: Do not try to ...





