See also:

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. ...

General Information
For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks: ...

Manual Operation
(Fan Control): Press these buttons to increase or decrease the fan speed. Pressing either fan button while in automatic control places the fan under manual control. The fan setting remains displayed ...