1999 GMC Yukon Owner's Manual - Page 134

yellowblue Sun Visors To block out glare, you can swing down the visors. You can also swing them out to help block glare at the front and side windows. Your visor may have a strap to hold small items, such as maps. Some visors have an extender on the inside edge. When the visor is down, pull the extender out for extra glare coverage at the front or side. Some visors have mirrors with lights. If the mirror has lights, they will come on when you lift the mirror cover. Universal Transmitter (If Equipped) This transmitter allows you to consolidate the functions of up to three individual hand-held transmitters. It will operate garage doors and gates, or with the accessory package, other devices controlled by radio frequency such as home/office lighting and security systems. 2-64