1999 GMC Sonoma Owner's Manual - Page 91

yellowblue Press the side of the switch with the down arrow to lower the window. Press the side of the switch with the up arrow to raise the window. Swing-Out Windows (Extended Cab) To open a rear swing-out window, pull the latch toward the front of the vehicle and then push the latch out and rearward. Express-Down Window The driver's window switch also has an express-down feature that allows you to lower it without holding the window switch. Hold the driver's window switch down for more than a half a second to activate the express-down feature. Lightly tap the switch to open the window slightly. The express-down feature can be interrupted at any time by pressing the up arrow end of the switch. When you close the window, be sure the latch catches. 2-33