Heater and air conditioner control (Chevrolet Tahoe 2)

General information

1. The heater and air conditioner operate only when the engine is running. The heater operation is directly related to the engine coolant temperature, so operate the heater when the engine is sufficiently warm. The amount of air passing through the heater/air conditioner can be adjusted by changing the fan speed.

2. On cars with air conditioning, after the cooling starts, the air coming out of the deflectors may look like fog for the first few minutes. This happens due to the sudden cooling of moist air and is not a sign of a malfunction.

3. Too much cooling is harmful to health. The air temperature in the cabin should be only 5-6°C lower than the outside air temperature.

4. When using the air conditioner, make sure that the outside air intake opening in front of the windshield is not blocked (for example, leaves).

5. The air conditioner should be turned on for at least 5 minutes every month, even in cold weather. This is necessary to lubricate the internal parts of the compressor and keep the air conditioner in working order.

6. When the air conditioner is turned on, the engine idle speed increases. Be careful when starting the car.

7. The air conditioning system has a built-in cabin filter to clean the air from dust and dirt.

Note: The air filter replacement procedure is given in the chapter "Maintenance and General Check and Adjustment Procedures".

Front heater control panel with manual control (Chevrolet Tahoe)

Note: The location of the switches is shown in the figure "Front heater control panel a manual control (Chevrolet Tahoe)".

1. Switch [1] sets the rotation speed of the heater electric fan (air flow power). There are 5 positions for adjusting the fan speed. Under normal conditions, it is recommended to set the switch to the first or second position. Position "0" - turns off the heater fan.

2. The regulator [2] is used to set the air temperature in the passenger compartment. Turn the switch knob clockwise to increase the temperature. The heater is switched off if the switch is turned counterclockwise until it stops.

Note: If the engine coolant temperature is low, the temperature of the air entering the passenger compartment does not change even when the switch is in the extreme right position.

3. Switch [3] is used to select the air flow distribution mode. To activate the desired mode, turn the handle to the appropriate position.

Note: The air flow distribution for different modes is given in the subsection "Front heater and air conditioner control panel with automatic control".

Manual Front Heater and Air Conditioner Control Panel (Chevrolet Tahoe, Avalanche)

Note: The switch locations are shown in the illustration "Front heater and air conditioner control panel with manual override (Chevrolet Tahoe, Avalanche)".

1. Switch [1] is designed to turn on the air conditioner (when the air conditioner is on, the indicator on the switch lights up). When pressed again, the air conditioner mode is turned off. The heater operates if the air conditioner mode is turned off.

2. The air intake mode switch [2] allows air to be taken in either from outside the vehicle (ventilation), or from the salon (recirculation). The air intake location is selected by pressing the switch (in the "Recirculation" position, the indicator on the switch will light).

Note: The recirculation mode, especially in cold weather, should be used for a short period of time to avoid excessive fogging of the windows.

3. Switch [3] sets the rotation speed of the heater electric fan (air flow power). There are 5 positions for adjusting the fan speed. Under normal conditions, it is recommended to set the switch to the first or second position. Position "0" - turns off the heater fan.

4. Switch [4] is used to set the air temperature in the passenger compartment on the driver's side. To change the air temperature in the passenger compartment on the front passenger side, use switch [5]. Move the switch handle up to increase the temperature, down to decrease it.

Note: If the engine coolant temperature is low, the temperature of the air entering the passenger compartment does not change even when the switch is in the upper position.

5. Switch [6] is used to select the air flow distribution mode. To activate the desired mode, turn the handle to the appropriate position.

Note: The air flow distribution for different modes is given in the subsection "Front heater and air conditioner control panel with automatic control".

Automatic front heater and air conditioning control panel

Note: The location of the switches is shown in the figure "Front heater and air conditioner control panel with automatic control".

1. Switch [8] (A/C) is used to turn on the air conditioner mode. When the air conditioner is on, the indicator on the switch and the indication on the LCD display are lit. Turning off the air conditioner mode (selecting a heater mode) is carried out by pressing the switch again.

2. Switch [10] (OFF) is designed to turn off the control system (turning off the air conditioner and heater).

3. Switch [3] (AUTO) is designed for automatic control of the air conditioner and heater.

a) When the switch is pressed, the automatic air conditioner/heater mode is activated, in which the set air temperature on the driver's side is automatically maintained. When the switch is pressed again [3] (less than 5 seconds) you can set the maintained air temperature on the passenger side using the regulator [4]. The indication on the LCD display shows that the "AUTO" mode is on. When this mode is turned on again, (including after restarting the engine) all selected settings are saved (mode, temperature, flow power, etc.).

b) The "AUTO" mode is switched off by pressing any switch except switch [3] (AUTO) and controls [1] and [4] (TEMP).

c) To resume operation of the system in fully automatic mode, press the switch [3] (AUTO) again.

4. Regulators [1] and [4] (TEMP).

a) The regulator [1] (TEMP) is used to set the air temperature in the passenger compartment on the driver's side. The temperature can be changed in 0.5°C increments by turning this regulator. The selected air temperature in the passenger compartment is displayed on the LCD display (to which it cools or heats up).



b) The air temperature in the vehicle interior on the front passenger side is changed by turning the regulator [4].

5. Air intake mode switch [9] (ventilation/recirculation) allows air to be taken either from outside the vehicle or from the passenger compartment. The air intake mode from the passenger compartment is selected by pressing the switch [9], and the indicator on the switch will light up.

Attention: when the ignition is turned on, the "Ventilation" mode will be automatically set regardless of the switch position (except when the "AUTO" mode is on).

6. The windshield defroster switch [6] is used to prevent the windshield from fogging up. When pressed, the indicator on the switch turns on. In this mode, the outside air intake mode and air conditioning will be automatically turned on (if the outside air temperature is above 2°C).

7. Switch [2] sets the rotation speed of the heater electric fan (air flow power), which is displayed on the LCD display. By pressing the switch [10] (OFF) you can turn off the electric fan.

8. Switch [7] (MODE) is used to change the direction of the air flow supplied to the passenger compartment. The mode is selected by successive pressing of the switch and is displayed by the corresponding icons on the LCD display.

Note: The number of directional arrows on the LCD display indicates the power of the air flow coming out of the corresponding deflectors.

a) The air flow is directed towards the head area.



b) The air flow is directed to the head and floor area simultaneously.



c) The air flow is directed almost entirely towards the floor.



d) The air flow is directed to the windshield, front door windows, the area of the outside mirrors and the floor.

Rear heater and/or air conditioning control panel (Chevrolet Tahoe, Cadillac Escalade)

Models with rear heater and automatic air conditioning

The rear heater and air conditioner can be controlled either from the panel located on the overhead console in the front of the passenger compartment or from the audio system control panel for the rear passengers.

Control from the control panel on the overhead console

1. Switch [1] (AUX).

a) Switch [1] (AUX) is used to turn on and control the rotation speed of the rear heater electric fan.

b) To enable the automatic maintenance of the set air temperature, set the "AUX" switch to the "AUTO" position.

c) To switch off the rear heater, move switch [1] to position 0.

2. The regulator [2] sets the air temperature in the rear of the passenger compartment within the range from 19 to 27°C.

3. Switch [3] changes the air flow direction mode. When the switch is set to "AUTO", the set speed will be maintained by automatically changing the air flow direction.

Control from the rear seat audio control panel

The rear heater and air conditioner can be controlled from the rear audio control panel only if the rear heater control panel (AUX) switch on the overhead console is set to any position other than 0.

1. Rear heater control mode from the rear audio control panel.

The mode is switched on by pressing the switch [4] (ON/OFF), and the display of the rear passenger audio system will show the set temperature, air flow direction mode and rear heater electric fan speed. By pressing the switch [4] again, the audio system display will return to the previous operating mode.

2. Briefly press the switch [5] to select the air direction mode. The selected mode is displayed on the rear seat audio system display. In "AUTO" mode, the air flow direction changes automatically depending on the selected temperature.

3. Switch [6] controls the air temperature in the rear of the passenger compartment. Press the switch to the "▼" side to decrease the temperature, to the "▲" side to increase the air temperature.

4. By pressing the switch [7] the rotation speed of the rear heater electric fan is set, i.e. the power of the air flow coming out of the deflectors. In the "AUTO" mode the rotation speed of the heater electric fan changes automatically depending on the set temperature, maintaining it constant.

Chevrolet Tahoe: Models with Rear Air Conditioning The rear air conditioner can be controlled either from the panel located on the overhead console in the front of the cabin, or from the panel located on the roof panel above the second row of seats.



The rear air conditioner is switched on and the power of the air flow coming out of the rear deflectors is changed by turning the rear air conditioner electric fan speed switch from position "0" to any other position.

Chevrolet Tahoe: Models with rear air conditioning and manual heater.

The rear heater and air conditioner can be controlled either from the panel located on the overhead console in the front of the cabin or from the panel located on the roof panel above the second row of seats.



1. To turn on the rear heater/air conditioner and change the power of the air flow coming out of the rear deflectors, turn the switch [1] from position "0" to any other position.

2. To change the air temperature in the rear of the passenger compartment, turn the switch [2]. To heat the air, turn the switch from the central position to the right, to cool the air, turn it to the right.

Note: Warm air will be supplied through the lower deflectors, cold air through the ceiling deflectors.

3. Switch [3] is used to select the air distribution mode in the rear compartment. To activate the desired mode, turn the knob to the appropriate position.