GMC Sierra 2010 Owner's Manual page 14

Windows
Turn the hand crank on each door to manually raise or
lower the manual windows.
Power Windows
Crew Cab Shown
The driver door has a switch for the passenger window
and rear windows as well.
Press the switch to lower the window. Pull the switch up
to raise it.
For more information, see:
Windows on page 3 14.
Power Windows on page 3 15.
1-8
If available, the power
window switches are
located on each of the
side doors in the front and
rear, if equipped.
Power Sliding Rear Window
The power sliding rear window cannot be operated
manually. Push or pull the switch to open or close
the window.
On vehicles with a power
sliding rear window, the
switch is located in the
overhead console.