GMC 1995 Safari Owner's Manual page 119

Temperature Lever
-
This lever is below the fan lever and selects the
temperature of the air flowing into your vehicle. Move the lever up for
warmer air. Move the lever down for cooler air.
Function Lever
-
This lever is below the fan lever and can be moved to
seven different functions.
DEFROST
-
The setting with the defrost symbol operates the defroster.
Most of the air comes out near the windshield, with some going to the floor
vents and side window defrost vents. Use this when you get fog or ice on
the windshield. The A/C compressor may operate in this setting to
dehumidify the air.
BLEND
-
With this setting, the heated outside air comes out both the
heater vents and defroster vents, with some air coming through the side
window vents. Adjust the temperature lever for warmer or cooler air. This
setting is useful for cold weather with a large number
of
passengers or very
humid conditions to help keep the windshield clear. The AIC compressor
may operate in this setting to dehumidify the air.
HTR (Heater) - Most of the air comes out near the floor. The rest comes
out from the defroster vents under the windshield and at the front side
windows. This is best for cold weather.
VENT
-
The air comes
out
at the vents on your instrument panel. The air
conditioner will not run. Adjust the temperature lever for warmer or cooler
air.
BI-LEV A/C
-
With this, outside air comes out through the heater floor
vent and the instrument panel vents. If you move your temperature control
lever between cold and hot, cooler air will come out of the upper vents
while warmer air comes out
of
the floor vent. This setting is useful in cool
weather with bright sunlight.
NORM A/C - This setting cools the outside air. If you first used MAX
A/C, use NORM A/C as soon as the vehicle has cooled down, so outside air
will be going through your vehicle.
MAX
A/C
-
This cools the air the fastest. Move the other lever all the way
to Cold. MAX A/C lets in only a little air from the outside. You can use
MAX A/C at first when it's really hot outside and you need to cool off
quickly.
When the air conditioning, defrost or BLEND is on, you may notice a slight
increase or decrease in engine speed, due to compressor operation.