GMC Envoy Owner's Manual page 164

H
(Panel): When panel mode is selected in the front
controller, the rear system will distribute air from the
four headliner outlets.
)
(Bi-level): When bi-level mode is selected in the
front controller, the rear system will distribute air from the
four headliner outlets and the third seat floor outlet.
6
(Floor): When floor mode is selected in the front
controller, the rear system will distribute air from the third
seat floor outlet.
The temperature of the air coming through the rear
outlets is determined by the front passenger's
temperature setting. Press the PWR button to turn the
rear climate controls on and off. Use the mode knob
to change the direction of airflow (upper, bi-level or floor)
to the rear seat area.
Envoy or Envoy Denali
If your vehicle has the rear seat audio system, the lower
buttons are used to adjust the rear seat climate control
system. The temperature of the air coming through the
rear outlets is determined by the front passenger's
temperature setting.
z9y
(Fan): Press this button to adjust
the fan speed.
z\y
(Mode): Press this button to change the
direction of airflow (panel, bi-level or floor) to the rear
seat area.
P
(On/Off): Press this button to turn the rear climate
controls on or off.
The rear control will only turn on if the front is on and
not in defrost mode.
3-29