2011 GMC Savana 2500 Cargo Owner's Manual - Page 182

7-12 Infotainment System Fixed Mast Antenna (Multi-Band) The multi-band antenna is located on the roof of the vehicle. The antenna is used for OnStar and the XM Satellite Radio Service System; if the vehicle has these features. Keep the antenna clear of obstructions for clear reception. Make sure there is sufficient clearance when entering garages or parking structures. Fixed Mast Antenna (Care) The fixed mast antenna can withstand most car washes without being damaged as long as it is securely attached to the base. If the mast becomes slightly bent, straighten it out by hand. If the mast is badly bent, replace it. Make sure there is sufficient clearance when entering garages or parking structures. Occasionally check to make sure the antenna is tightened to its base. If tightening is required, tighten by hand. Audio Players CD Player Care of the CD Player Do not add any label to a CD. It could get caught in the CD. If a CD is recorded on a personal computer and a description label is needed, try labeling the top of the recorded CD with a marking pen. The use of CD lens cleaners is not advised, due to the risk of contaminating the lens of the CD optics with lubricants internal to the CD player mechanism. Notice: If a label is added to a CD, or more than one CD is inserted into the slot at a time, or an attempt is made to play scratched or damaged CDs, the CD player could be damaged.