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:
Bulb Replacement
For the proper type of replacement bulbs, see Replacement Bulbs .
For any bulb-changing procedure not listed in this section, contact your dealer. ...
Retained Accessory Power (RAP)
These vehicle accessories can be
used for up to 10 minutes after the
engine is turned off:
- Audio System
- Power Windows
- Sunroof (if equipped)
Power to the audio system will work
up to 10 ...
Liftgate
The liftglass or liftgate cannot be opened if the rear wiper is in motion. Attempting
to open the liftglass or liftgate while the rear wiper is in motion will cause the
release of the liftglass ...






