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HVAC System - Automatic: Removal & Installation Chevrolet Silverado 2500 HD

Automatic HVAC System 7 illustrations ~353 words

Removal Procedure

Note. In order to avoid actuator damage, DO NOT apply power to the actuator when it is not installed in the HVAC module.

  1. Remove the air distribution duct. Refer to «Air Distributor Duct Replacement»(ref-277995-S20219599742008012100000) .
  2. Disconnect the electrical connection from the recirculation actuator (1).
  3. Remove the recirculation actuator retaining screws.
  4. Remove the recirculation actuator.

Installation Procedure

  1. Install the recirculation actuator.
  2. Install the recirculation actuator retaining screws. Tighten: 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. Refer to «Air Distributor Duct Replacement»(ref-277995-S20219599742008012100000) .
  5. Re-calibrate the recirculation actuator. Refer to «Actuator Recalibration»(ref-277997-S14196406832008012100000) .

Scheme 28

Scheme 28: Mode Actuator Replacement
Scheme 28: Mode Actuator Replacement
CalloutComponent Name
NOTE: In order to avoid actuator damage, DO NOT apply power to the actuator when it is not installed in the HVAC module. Preliminary Procedure Remove the knee bolster. Refer to Knee Bolster Replacement (without RPO SLT) or Knee Bolster Replacement (with RPO SLT) . Remove the air outlet duct - floor LH. Refer to Floor Air Outlet Duct Replacement - Left Side . Disconnect the electrical connector from the mode actuator.
1Mode Actuator Screw (Qty: 2) NOTE: Refer to Fastener Notice . Tighten: 1.6 N.m (14 lb in)
2Mode Actuator Procedure: Re-calibrate the mode actuator. Refer to Actuator Recalibration . Tip: Mode actuator cam is now accessible.
NOTE
In order to avoid actuator damage, DO NOT apply power to the actuator when it is not installed in the HVAC module.
NOTE
Refer to Fastener Notice .

Mode Actuator Replacement

Scheme 29

Scheme 29: Air Temperature Actuator Replacement - Right Side
Scheme 29: Air Temperature Actuator Replacement - Right Side
CalloutComponent Name
NOTE: In order to avoid actuator damage, DO NOT apply power to the actuator when it is not installed in the HVAC module. Preliminary Procedure Remove the instrument panel center trim panel. Refer to Instrument Panel Center Trim Panel Replacement (with RPO SLT) . Disconnect the electrical connector from the air temp actuator.
1Air Temp Actuator Screws (Qty: 2) NOTE: Refer to Fastener Notice . Tighten: 1.6 N.m (14 lb in)
2Air Temp Actuator Procedure: Re-calibrate the air temp actuator. Refer to Actuator Recalibration .
NOTE
In order to avoid actuator damage, DO NOT apply power to the actuator when it is not installed in the HVAC module.
NOTE
Refer to Fastener Notice .

Air Temperature Actuator Replacement - Right Side

Scheme 30

Scheme 30: Air Temperature Actuator Replacement - Left Side
Scheme 30: Air Temperature Actuator Replacement - Left Side
CalloutComponent Name
NOTE: In order to avoid actuator damage, DO NOT apply power to the actuator when it is not installed in the HVAC module. Preliminary Procedure Remove the instrument panel insulator. Refer to Instrument Panel Insulator Replacement (Without RPO SLT) or Instrument Panel Insulator Replacement (with RPO SLT) . Disconnect the electrical connector from the air temp actuator.
1Air Temp Actuator Screws (Qty: 2) NOTE: Refer to Fastener Notice . Tighten: 1.6 N.m (14 lb in)
2Air Temp Actuator Procedure: Re-calibrate the air temp actuator. Refer to Actuator Recalibration .
NOTE
In order to avoid actuator damage, DO NOT apply power to the actuator when it is not installed in the HVAC module.
NOTE
Refer to Fastener Notice .

Air Temperature Actuator Replacement - Left Side

Scheme 31

Scheme 31: Air Temperature Sensor Replacement - Lower Left Side
Scheme 31: Air Temperature Sensor Replacement - Lower Left Side
CalloutComponent Name
Preliminary Procedure: Remove the knee bolster. Refer to Knee Bolster Replacement (without RPO SLT) or Knee Bolster Replacement (with RPO SLT) .
1Air Temperature Sensor - LH Tip: Disconnect the electrical connector and rotate sensor 1/4 turn to remove.

Air Temperature Sensor Replacement - Lower Left Side

Scheme 32

Scheme 32: Air Temperature Sensor Replacement - Lower Right Side
Scheme 32: Air Temperature Sensor Replacement - Lower Right Side
CalloutComponent Name
Preliminary Procedure: Remove lower center I/P trim panel. Refer to Instrument Panel Lower Center Trim Replacement .
1Air Temperature Sensor - RH Tip: Disconnect the electrical connector and rotate sensor 1/4 turn to remove.

Air Temperature Sensor Replacement - Lower Right Side

Scheme 33

Scheme 33: Ambient Air Temperature Sensor Replacement
Scheme 33: Ambient Air Temperature Sensor Replacement
CalloutComponent Name
Preliminary Procedure Remove the top portion of the grill and gently pull forward. Refer to Radiator Grille Replacement (GMC) or Radiator Grille Replacement (Chevrolet) . Disconnect ambient air sensor electrical connector.
1Ambient Air Sensor Procedure: Carefully lift ambient air sensor from the radiator support. Tip: Vehicles with automatic HVAC, use the ambient air sensor located on the right side of the radiator support.

Ambient Air Temperature Sensor Replacement

  1. Remove the left windshield garnish molding. Refer to «Windshield Pillar Garnish Molding Replacement»(ref-277987-S37806746632008012100000) .
  2. Remove the left center pillar assist handle. Refer to «Roof Rail Rear Assist Handle Replacement»(ref-277987-S07612843182008012100000) .
  3. Remove the center pillar garnish molding. Refer to «Center Pillar Upper Garnish Molding Replacement»(ref-277987-S25278181932008012100000) .
  4. Remove the left sunshade. Refer to «Sunshade Replacement»(ref-277987-S17342381142008012100000) .
  5. Gently pull down the headliner.
  6. Disconnect the electrical connector from the inside air temperature sensor.
  7. Partially remove the inside air temperature sensor from the headliner.
  8. Remove the sensor grille from the inside air temperature sensor.
  9. Remove the inside air temperature sensor from the headliner.
  1. Install the new sensor grille to the headliner.
  2. Install the inside air temperature sensor to the headliner and sensor grille.
  3. Connect the electrical connector to the inside air temperature sensor.
  4. Install the left sunshade. Refer to «Sunshade Replacement»(ref-277987-S17342381142008012100000) .
  5. Install the left center pillar garnish molding. Refer to «Center Pillar Upper Garnish Molding Replacement»(ref-277987-S25278181932008012100000) .
  6. Install the left center assist handle. Refer to «Roof Rail Rear Assist Handle Replacement»(ref-277987-S07612843182008012100000) .
  7. Install the left windshield garnish molding. Refer to «Windshield Pillar Garnish Molding Replacement»(ref-277987-S37806746632008012100000) .

Scheme 34

Scheme 34: Sun Load Sensor Replacement
Scheme 34: Sun Load Sensor Replacement
CalloutComponent Name
1Instrument Panel Trim Panel Refer to Instrument Panel Upper Trim Panel with Windshield Defroster Nozzle Grille Replacement (without RPO SLT) or Instrument Panel Upper Trim Panel with Windshield Defroster Nozzle Grille Replacement (with RPO SLT) .
2Sun Load Sensor Tip: Twist and pull down to remove. Disconnect electrical connector.

Sun Load Sensor Replacement

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