Heating System (Without Air Conditioning) - GMC SIERRA 1994 Manual

Weating System (Without Air Conditioning)
If your vehicle does not have air conditioning, this is what your heating
system will look like.
Function Le wer
The upper lever on the control panel can be moved to three different heating
functions.
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Vent (Left): Air comes out at the vents on your instrument panel and at
your front side windows.
Heater (Center): Air comes out near the floor. This setting, along
with a heat setting, is best for cold weather.
Defrost (Right): This setting operates the defroster. Air comes out
near the bottom of the windshield and at your front side windows. Use
this setting, along with
a
heat setting, when you get fog or ice on the
windshield.
Placing the lever between positions sends air out both vents.
Temperature Le wer
The lower lever on the control panel lets you select the temperature of the
air flowing into the passenger area of your vehicle. Move the lever right
toward
"+"
for warmer air. Move the lever left toward
"-"
for cooler air.
Fan Control Knob
The knob on the right side of the heating system control panel controls the
fan speed. The knob has four speed positions. To increase the air flow, turn
the knob toward
"+".
To decrease the air flow, turn it toward "-".
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