GMC 1998 Yukon - Defogging and Defrosting

Your vehicle has air outlets in the center and on the sides
of your instrument panel. You can move the outkts from
side-to-side or up and down to direct the flow of air, or
close the outlets altogether. When you close an outlet, it
will increase the flow of air corning out of any outlets
that are .open. These outlets do not completely shut off
airflow when in a dosed vent position.
The use of hood air deflectors may adversely
affect
the performance of the heating and air
conditioning system.
Defogging and Defrosting
On cool, humid days, use DEFOG to keep the
windshieId and side windows clear. Use DEFROST to
remove fog or ice from the windshield in extremely
humid or cold conditions. Use DEFaQST with the
temperature knob toward the red area and the fan control
toward HI.
3-8