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.
Training
DealersAll U.S. GM Dealers participating in the Center of Learning / GM Service TechnicalCollege (STC) Programs can enroll through the Center of Learning website at https://www.centerlearning.com.Within the website, there are individual training paths that are designed to assistin planning the train ...