GMC 2007 Envoy - Manual (Page 189)

Rear Window Defogger
If your vehicle has the rear window defogger a
warming grid is used to remove fog on the
rear window.
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(Rear): Press this button to turn the rear
window defogger on or off. An indicator light in the
button will come on to let you know that the
rear window defogger is active. The rear window
defogger will automatically turn off approximately
ten minutes after the button is pressed.
If your vehicle has heated mirrors, this button will
activate them.
Notice: Do not use anything sharp on the
inside of the rear window. If you do, you could
cut or damage the warming grid, and the
repairs would not be covered by your warranty.
Do not attach a temporary vehicle license,
tape, a decal or anything similar to the
defogger grid.
Dual Automatic Climate Control
System
With this system you can control the heating,
cooling and ventilation for your vehicle. When your
vehicle is first started and the climate control
system is on, or if the climate control system
has been turned on, the display will show
the driver’s temperature setting for five seconds.
Then it will show the outside temperature.
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