2006 GMC Yukon Owner's Manual - Page 111

Power Windows The power window controls are located on each of the side doors. The driver's door has a switch for the passenger and rear windows as well. Your power windows will work when the ignition has been turned to ACCESSORY or RUN or when Retained Accessory Power (RAP) is active. See Retained Accessory Power (RAP) on page 2-20. Press the switch to lower the window. Pull up the front edge of the switch to raise the window. 2-15