Chevrolet Low Cab Forward 6.7L Diesel Engine 6500XD (GMNA-Localizing-
U.S.-15749874) - 2022 - CRC - 12/1/21
102
Climate Controls
Temperature Control Knob :
Use this knob
to select the preferred cab interior
temperature. Turn the knob
counterclockwise to lower the outlet air
temperature and clockwise to raise it.
Fan Speed Control Knob :
The fan speed can
be adjusted to any of the four speeds
available.
Air Conditioning (A/C) Switch :
Press this
switch to use the air conditioning system.
The indicator light inside the switch will
come on to show that the air conditioning
system is in operation. The air conditioning
system can also be used for dehumidifying
while the heater is being used. To turn off
the air conditioning, push this switch in
again.
When the defrost mode is selected, the air
conditioner compressor will be on.
Even if the A/C switch is turned on, the air
conditioning system will not operate when
the fan speed control knob is placed in the
stop position. Make sure that the fan speed
control knob is in a position other than the
stop position.
Even in seasons when the air conditioning
system is not used, occasionally operate the
system for a few minutes with the engine
running at a low speed in order to keep the
system's components lubricated.
Ventilation
Outside Air Ventilation :
Press the A/C
switch to the off position. Turn the outlet
selector knob to the preferred position.
Move the air selector lever to the
P
position.
Set the temperature control knob to the
desired position. Adjust the fan speed
control knob to the preferred speed.
How to Use the Heater
Normal Heating :
Set the outlet selector
knob to the
6
or
-
position. Use the
-
position for warming your feet while
defogging the windshield.
Set the air selector lever to the
P
position. Adjust the temperature control
knob and the fan speed control knob to the
desired positions.
To dehumidify the cab interior while
heating, press the A/C switch to the on
position.
As the heater uses the heat from the engine
coolant, its heating effect is weak when the
engine coolant temperature is low.
Maximum Heating :
Turn the outlet
selector knob to the
6
position, set the
air selector lever to the
O
position, and
turn the temperature control knob fully
towards the high temperature direction.
Set the fan speed control knob to the
maximum speed position.
Bi-Level Heating :
Set the outlet selector
knob to the
)
position. Set the air selector
lever to the
P
position. Set the
temperature control knob to the middle
position.
Adjust the fan speed control knob as
desired. The air from the floor outlets is
warmer than the air from the upper outlets
in this position.
However, when the temperature control
knob is moved to either the full hot or the
full cold position, the air from the floor
outlets and the air from the upper outlets
will be the same temperature. This position
can give cool upper level air and warm floor
level air when the temperature control is
