Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle.
See also:
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position.
• The ignition should turn to LOCK/OFF only when the shift lever is in P (Park).
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When the System Does Not Seem to Work Properly
The following messages may be displayed on the DIC:
SERVICE PARKING ASSIST: If this message occurs, take the vehicle to your dealer
to repair the system.
PARK ASSIST OFF: If the URPA system does n ...
Finding a Channel
BAND: Press to switch between AM, FM, or XMâ„¢, if equipped.
(Tune): Turn to manually select an XM channel.
SEEK: Press to go to the previous XM channel.
SEEK: Press to go to the next XM channel ...