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 Players#07-08-49-020H: IPC Odometer Programming Method Quick Reference Guide - (Jun 5, 2013) Gauges Odometer
Subject:IPC Odometer Programming Method Quick Reference GuideModels: 2003-2014 GM Passenger Cars and TrucksAttention: This bulletin applies to vehicles sold in the U.S. and Canada Only.This bulletin is being revised to add the 2014 model year and update model list. Pleasediscard Corporate Bulletin ...