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 operate if the battery is discharged or disconnected.
See also:
Interior
The Sierra showcases two different interior designs. Work Truck and SLE
models are more utility-minded, with large controls and door handles that can be
operated while wearing gloves. The SLT offe ...
Rear Vision Camera (RVC)
The vehicle may have a rear vision camera system. Read this entire section before using it.
WARNING
The RVC system does not display pedestrians, bicyclists, animals, or any other object located outs ...
XM™ Satellite Radio Service
XM is a satellite radio service based in the 48 contiguous United States and 10 Canadian provinces.
XM Satellite Radio has a wide variety of programming and commercial-free music, coast to coast, and ...