GMC 1996 Sonoma Owner's Manual page 80

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.
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 1/2 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.
Swing-Out
\
lows (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.
When you close the
window, be sure the
latch catches.
2-32