The multi-band antenna is on the roof of the vehicle. The antenna is used for AM-FM radio, OnStar, the SiriusXM satellite radio service system, and GPS (Global Positioning System), if the vehicle has these features. Keep the antenna clear of obstructions for clear reception.
If the vehicle has a sunroof, and it is open, reception can also be affected.
Radio Reception
Audio PlayersThrottle Body Inspection and Cleaning Engine Control Air Metering/Acceleration Throttle
Note:Over extended time and mileage, deposits may accumulate on the back of the throttlevalve plate. Typically these deposits pose no problem. Occasionally the deposit mayaccumulate to a point where perceived pedal effort or throttle valve movement is effected.Remove the air cleaner outlet duct. Ref ...