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:
Removing the Spare Tire and Tools
The equipment needed to change a flat tire is stored under the storage tray,
located on the driver side trim panel, over the rear wheelhouse.
Regular Wheelbase Shown, Extended Wheelbase Similar.
...
Hitches
The correct hitch equipment helps maintain combination control. Many trailers
can be towed with a weight carrying hitch which simply features a coupler latched
to the hitch ball, or a tow eye latc ...
When the System Does Not
Seem to Work Properly
The following messages may be
displayed on the DIC:
PARKING ASSIST OFF: This
message occurs if the driver
disables the system or if vehicle is
driven above 8 km/h (5 mph) in
R (Reverse).
S ...