GMC Chevrolet Tahoe 2003 Manual page 112

Windows
{
CAUTION:
Leaving children in a vehicle with the windows
closed is dangerous. A child can be overcome
by the extreme heat and can suffer permanent
injuries or even death from heat stroke. Never
leave a child alone in a vehicle, especially with
the windows closed in warm or hot weather.
2-16
Manual Windows
Turn the hand crank on each door to manually raise or
lower the manual windows.
Power Windows
If you have power windows, the controls are located on
each of the side doors.