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:
Climate Controls
The heating, cooling, and ventilation for the vehicle can be controlled with
these systems.
Automatic Climate Control System
A. Power
B. Temperature Control
C. Fan Control
D. Air Delivery Mod ...
Normal Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can
be obtained from
your dealer.
...
Entry Lighting
The headlamps, taillamps, license plate lamps, back-up lamps, dome lamps, and most of the interior lights turn on briefly when the Remote Keyless Entry (RKE)
is pressed.
See Remote Keyless Entry ...