GMC 2003 Envoy - Manual (Page 155)

Envoy XL
To operate the rear air coiiditionin^ 5v5ten>, the front air
conditioning systsm mu$l bo on. With the front air
conditioning system od, the rear system controls can
only be used to circulate air in the rear of the vehicle.
To adjust the airflow speed, turn the fan knob (driver
override Ewjlch)^ located on the floor console to T 3 or 3.
The rear mode and temperature positions now mimic
the front control System mode and paSsangarsidg
ternperature.
/J (Panel); When par>ai rnpde Js selected in th0 front
conlrcJIar, the rear System will dislnbute air from the four
headliner outlets
(Bi-level): When bi-leval moda Is selected In the
front controller, the rear system will dislribute air
from ihe four headliner outlets and the ttilrd seal door
outlet.
ifJ (Floor); When floor mode is selected In ihe front
controller, the rear system will distribute air Irom ihe third
seat Moor Outlet.
(Detog)i When deiog mode is selected in the front
controller, Ihe rear system wjit distribota air from jhe
third seal floor oullet
iii? (Petrost); When defrost mode is seiecied in the
front controller, the rear system will distribute air
from the third seat doof outlet.
To activate the second row seat conirois in the following
systems, set the fan knob, located on iha front
console, to R.
3-30