Defogging And Defrosting; Outlet Adjustment - GMC 2003 Sonoma Owner's Manual

Defogging and Defrosting

Fog on the inside of the windows is a result of high
humidity (moisture) condensing on the cool window
glass. This can be minimized if the climate control
system is used properly. There are two modes to clear
fog or frost from your windshield and side windows.
Use the defog mode to clear the windows of fog
or moisture and warm the passengers. Use the defrost
mode to remove fog or frost from the windshield
more quickly. For best results, clear all snow and ice
from the windshield before defrosting.
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(Defog): This mode can be used on cool, humid
days to keep the windshield and side windows clear.
1
(Defrost): This mode directs most of the air to the
windshield and the side window outlets, with only a
little air directed to the floor outlets. When you select this
mode, the system runs the air-conditioning compressor
unless the outside temperature is at or below freezing.
Do not drive the vehicle until all the windows are clear.
3-22

Outlet Adjustment

The flow through outlets on your vehicle allow outside
air to enter your vehicle while it is moving. Outside
air will also enter your vehicle while the air-conditioning
compressor is running.
Use the thumbwheels located in the center and on the
sides, to change the direction of the air flowing
through the outlets.