2006 GMC Yukon Owner's Manual - Page 143

Pull out the mirror head to extend it for better visibility when towing a trailer. Outside Power Mirrors If your vehicle is equipped with power outside mirrors, the controls are located on the driver's door armrest. If your vehicle is equipped with this trailer towing type mirror, they can be adjusted so you can have a clear view of the objects behind you. Pull out the mirror head to extend it for better visibility when towing a trailer. These mirrors can also be manually folded in. On the lower portion of the mirror is a convex mirror. A convex mirror's surface is curved so you can see more from the driver's seat. Move the selector switch located above the control pad to the left or right to choose the mirror you want to adjust, then press the dots located on the four-way control pad to adjust the mirror. 2-47