2009 GMC Yukon Owner's Manual - Page 158

Outside Convex Mirror Outside Heated Mirrors For vehicles with heated mirrors: { CAUTION: A convex mirror can make things, like other vehicles, look farther away than they really are. If you cut too sharply into the right lane, you could hit a vehicle on the right. Check the inside mirror or glance over your shoulder before changing lanes. The passenger side mirror is convex shaped. A convex mirror's surface is curved so more can be seen from the driver seat. < (Rear Window Defogger): Press to heat the mirrors. See "Rear Window Defogger" under Dual Automatic Climate Control System on page 3-25 or Climate Control System on page 3-22 for more information. Side Blind Zone Alert (SBZA) If your vehicle has the Side Blind Zone Alert (SBZA) system, see Side Blind Zone Alert (SBZA) on page 2-55. 2-52