Cellular and GPS Antennas :: OnStar Additional Information :: OnStar :: GMC Sierra Owners Manuals :: GMC Sierra | GMCia.com

Cellular and GPS Antennas

GMC Sierra / GMC Sierra Owners Manuals / OnStar / OnStar Additional Information / 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.

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Automatic Operation
The system automatically controls the fan speed, air delivery, air conditioning, and recirculation to heat or cool the vehicle to the selected temperature. When the AUTO indicator light is on, the ...

Testing the Alarm
To test the alarm: 1. From inside the vehicle, lower the driver side window, and open the driver door. 2. Press . 3. Get out of the vehicle, close the door, and wait for the security light to go ou ...

Split Folding Seatbacks
With this feature, either side of the rear seatback can be folded down for more cargo space. WARNING If either seatback is not locked, it could move forward in a sudden stop or crash. That could ...