GMC 2003 Sierra - Manual (Page 177)

(R^gircutstifin): ThiE rtiCfrculahon Jt]i)6& l£ uS^d IC
rEcanculata Ihe air inside oi yciuf vehicle. Use this iTiOde lo
iielp prevent otJtsicle odors ar>d/or dust fгoíл entering your
vahiclo or lo hefp cool tha air InsECfe oi your vehicle more
quickly. Pi ess this button to hjm the recirculation modo
on or off. The light on the redrculatior] buttonift/ill
llfurminate. Recirculalion cannot be used in floor, blond or
defrost modes. An Indicator on the burton wHf light up^
flash three times and turn oif when rocrrculatEon is
selecled in these modes.lTie ait-condilioning compressor
will also com« on whsn this mode is activated. While in
recirculatron mode ibe windows may Г
03 when the
weather Is cold and damp. Та clear the fog, selact either
Ihe blend or defrost mode and Increase fan speed.
Temperalure Control
Driver's Side: Tlie lever on the left side oi the cJimate
contfol pane! is used to raise or lower the temperature on
the driver's side of ihe vehicle. This lever also adjusts the
lemperaturB to the center
cotisd I g outlets (If equippedJ,
Passenger's Side: The lever on the right side of the
ciimgte conlrol pane! is used to raisG or lower the
temperature on the passenger's side of the vehicle.
'O' (Ail'Cortditjanfng); Press this button lo lum Ihe
air-condrtionjng system on or off. t/Vhen the button Is
pressed, an indicator light will come on and the system
will begin Ic cool and dehumidify the air Inside of your
vehicle. Vou may notice a slight change in engine
performance when Ihe air conditlorring compressor shuts
off and turrs on again. This Is normal.
Defogging and Defrosting
There are two modes to choose from to clear fog or
frost from your windshield. Use the defog mode to clear
the windows of log or moisture and warm the
passengers. Use ihe defrost mode to remove fog or
frost from the windshield more quickly.
Turn the right knob clockwise or counterclockwise to
saJect one of Ihe foNowing modeer
(Defog): This mode direefs the air lo the floor
□ uUete. windshield and ihe side window vents. The air
conditioning compressor will run automaticaiiy to
dehumidify th« air to prevent window fogging. The
recirculation mode cannot be selecled while in the
efafog mode.
^ (Defrost): This mode direcis most of the air to the
windshield and the side window ventS: with only a
lltfle air dinected to Ihe fioor venis. The air condhioning
compressor will run automatically to dehumidify the
air to prevent window fogging. The recircijiaiion mode
cannot be selected while in detnost mode.