Chevrolet 2003 Tahoe Owner's Manual page 185

Rear Controls
The rear seat controls have the following settings:
6
(On/Off): Press this button to turn the rear seat
comfort controls on or off.
+2
(Mode): Press this button to select the air delivery,
and setting, and AUTO mode.
&
(Temperature): Press this button up or down to
increase or decrease the temperature setting.
A
8 8
v
(Fan): Press this button up or down to adjust
the fan speed.
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