HVAC Systems - Automatic: Removal & Installation Chevrolet Silverado 2500

Installation Procedure

1. Connect the electrical connectors to the HVAC control module.
2. Install the HVAC control module into the instrument panel, ensuring that the HVAC control module retaining tabs lock into place.
3. Install the screws from the HVAC control module. Tighten the screws to 1.9 N.m (17 lb in).
4. Install the instrument panel accessory trim plate.

Scheme 160

Scheme 161

1. If equipped, remove the sound insulator panel.
2. Disconnect the electrical connector at the blower motor.
3. Disconnect the electrical connector (4) from the blower motor control processor (2).
4. Remove the blower motor control processor retaining screws (3) from the HVAC module (1).
5. Remove the blower motor control processor (2) from the HVAC module (1).

1. Install the blower motor control processor (2) to the HVAC module (1).
2. Install the blower motor control processor retaining screws. Tighten the screws to 1.6 N.m (14 lb in).
3. Connect the electrical connector (4) to the blower motor control processor (2).
4. Connect the electrical connector at the blower motor.
5. If equipped, install the sound insulator panel.

Scheme 162

Scheme 163

1. Remove the air distribution duct.
2. Disconnect the electrical connection from the recirculation actuator (1).
3. Remove the recirculation actuator retaining screws.
4. Remove the recirculation actuator.

1. Install the recirculation actuator.
2. Install the recirculation actuator retaining screws. Tighten the screws to 1.6 N.m (14 lb in).
3. Connect the electrical connector to the recirculation actuator (1).
4. Install the air distribution duct.

Mode Actuator Replacement (W/O D07)

Note. D07 is GM RPO code for front compartment, floor, custom.

Scheme 164

Scheme 165

Scheme 166

1. Remove the floor air outlet duct extension (1) from the floor duct (2).
2. Disconnect the electrical connection at the mode actuator (10).
3. Remove the mode actuator mounting screws from the HVAC module.
4. Remove the mode actuator as an assembly with the actuator cam.

1. Install the mode actuator as an assembly with the actuator cam. Line up the heater/defroster lever with the mode actuator cam slot. Line up the A/C lever with the mode actuator cam.
2. Install the mode actuator mounting screw to the HVAC module. Tighten the screw to 1.6 N.m (14 lb in).
3. Connect the electrical connection at the mode actuator (10).
4. Install the floor air outlet duct extension (1) to the floor air duct (2).

Mode Actuator Replacement (W/ D07)

Note. D07 is GM RPO code for front compartment, floor, custom.

Scheme 167

Scheme 168

Scheme 169

1. Remove the floor air outlet duct extension (1) from the floor duct (2).
2. Remove the center console.
3. Remove the screws from the center console duct.
4. Remove the center console duct.
5. Disconnect the electrical connection from the mode actuator (10).
6. Remove the mode actuator mounting screws from the HVAC module.
7. Remove the mode actuator as an assembly with the actuator cam.

1. Install the mode actuator as an assembly with the actuator cam. Line up the heater/defroster valve lever with the mode actuator cam slot. Line up the A/C valve lever with the mode actuator cam.
2. Install the mode actuator mounting screw to the HVAC module. Tighten the screw to 1.6 N.m (14 lb in).
3. Connect the electrical connection at the mode actuator (10).
4. Install the center console duct.
5. Install the screws from the center console duct. Tighten the screw to 1.6 N.m (14 lb in).
6. Install the center console.
7. Install the floor air outlet duct extension (1) to the floor air duct (2).

Scheme 170

Scheme 171

Scheme 172

1. Remove the IP insulator.
2. Disconnect the electrical connector (8) from the air temperature actuator (9).
3. Remove the air temperature actuator retaining screws.
4. Remove the air temperature actuator.

1. Install the air temperature actuator.
2. Install the air temperature actuator retaining screws. Tighten the screws to 1.6 N.m (14 lb in).
3. Connect the electrical connector (8) to the air temperature actuator (9).
4. Install the IP insulator.

Scheme 173

1. Remove the radio.
2. Disconnect the electrical connector from the upper duct air temperature sensor.
3. Remove the upper duct air temperature sensor from the air duct by prying out of the duct.

1. Install the upper duct air temperature sensor to the air duct.
2. Connect the electrical connector to the upper duct air temperature sensor.
3. Install the radio.

Scheme 174

1. Remove the lower duct air temperature sensor (3) and wiring harness assembly from the floor air outlet (2).
2. Disconnect the electrical connector from the lower duct air temperature sensor (3).

1. Connect the lower duct air temperature sensor (3) to the electrical connector.
2. Install the lower duct air temperature sensor (3) and wiring harness assembly to the floor air outlet (2).

Scheme 175

1. Remove the Park/Turn Signal.
2. Disconnect the electrical connector from the ambient air temperature sensor (3).
3. Remove the ambient air temperature sensor (3).

1. Install the ambient air temperature sensor (3).
2. Connect the electrical connector to the ambient air temperature sensor (3).
3. Install the park/turn signal.

Scheme 176

Scheme 177

1. Remove the left windshield garnish molding.
2. Remove the left center pillar assist handle.
3. Remove the left sunshade.
4. Remove the retaining screws from the headliner.
5. Gently pull down the headliner.
6. Remove the inside air temperature sensor from the headliner.
7. Disconnect the electrical connector from the inside air temperature sensor.
8. Remove the inside air temperature sensor from the headliner.

1. Install the inside air temperature sensor to the headliner.
2. Connect the electrical connector to the inside air temperature sensor.
3. Install the screws to the headliner.
4. Install the left sunshade.
5. Install the left center assist handle.
6. Install the left windshield garnish molding.

Removal Procedure

1. Remove the instrument panel upper trim panel.
2. Turn the sun load sensor (2) 1/4 turn and remove it from the upper trim panel.
3. Disconnect the electrical connector.

1. Connect the electrical connector.
2. Install the sun load sensor (2) to the upper trim panel, turning it 1/4 turn to secure it in place.
3. Install the instrument panel upper trim panel.