Air Conditioning; Heating; Defogging And Defrosting - GMC YUKON DENALI 2000 Manual

Air Conditioning

On hot days, open the windows long enough to let hot
air inside escape. This reduces the time it takes for your
vehicle to cool down. Then keep your windows closed
for the air conditioner to work its best.
With the A/C on, move the temperature knob to MAX
for maximum cooling. This setting also puts the system
in the recirculation mode and helps to maximize your air
conditioner's performance and your vehicle's fuel
economy. This setting also cools the air the fastest. After
the vehicle's interior reaches a comfortable temperature,
move the temperature knob to the right to place the air
conditioning system in the normal mode.
3-4

Heating

On cold days, use the HEATER or VENT/HEAT setting
with the temperature knob in the red area.
If you use the engine coolant heater before starting your
engine in cold weather, 20 _ F (
heating system will produce warmer air faster, to heat
the passenger compartment in cold weather.
The use of an engine coolant heater also reduces the
time it takes for the engine to reach normal operating
temperature, and shortens the time it takes the heater to
reach full output. For more information, see "Engine
Coolant Heater" in the Index.

Defogging and Defrosting

On cool, humid days, use DEFOG to keep the
windshield and side windows clear. Use DEFROST to
remove fog or ice from the windshield in extremely
humid or cold conditions. Use DEFROST with the
temperature knob toward the red area and the fan control
toward HI.
8 _ C) or lower, your
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