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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1554 (HVAC System - Automatic) >> Repair Instructions >> Air Conditioning Refrigerant Temperature Sensor Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the instrument panel compartment door assembly. Refer to INSTRUMENT PANEL COMPARTMENT DOOR REPLACEMENT (WITH RPO SLT) .
  2. Remove the instrument panel inflatable restraint module. Refer to INSTRUMENT PANEL INFLATABLE RESTRAINT MODULE REPLACEMENT .
    3. Fig 1: Air Conditioning Refrigerant Temperature Sensor Connector
    GM2851615Courtesy of GENERAL MOTORS COMPANY
  3. Disconnect the air conditioning refrigerant temperature sensor connector (1).
  4. Test the resistance reading of the air conditioning refrigerant temperature sensor. Refer to Sensor Resistance Table .
  5. Remove the right side instrument panel insulator. Refer to INSTRUMENT PANEL INSULATOR REPLACEMENT (WITH RPO SLT) , INSTRUMENT PANEL INSULATOR REPLACEMENT (WITHOUT RPO SLT) .
  6. Remove the rubber plug from the bottom of the air conditioning and heater module assembly if equipped, and proceed to step 13. If air conditioning and heater module assembly is not equipped with rubber plug proceed to the next step.
    7. Fig 2: Magnifying Glass - First Design
    GM2851632Courtesy of GENERAL MOTORS COMPANY
    NOTE: First design lower evaporator case part number 20883396.
    Fig 3: Magnifying Glass - Second Design
    G00593708Courtesy of GENERAL MOTORS COMPANY
    NOTE: Second design lower evaporator case part number 20958709.
  7. Select the first or second design lower evaporator case template by the part number, click on the magnifying glass to open the template.
  8. Above the template image, click on the printer icon next to the 1:1 in order to print in the correct scale.
    NOTE:

    No other printing method is acceptable as scale changes print size.

  9. Make a copy of the template using a copy machine, and re-size the template vertical and horizontal axis to a scale 50 mm.
  10. Cut the template out along the printed ribs.
    11. Fig 4: Heater Module Assembly
    GM2851623Courtesy of GENERAL MOTORS COMPANY
  11. Secure the template to the bottom of the air conditioning and heater module assembly (1) with tape. The template should fit snugly between the molded ribs.
    12. CAUTION:

    Extreme care must be taken when drilling into the air conditioning and heater case module. Misalignment of the hole can cause damage to the air conditioning evaporator or temperature door requiring replacement of these components.

  12. Slowly drill a hole through the air conditioning and heater module assembly using a 1-1/4 inch (32 mm) hole saw following the template outline.
  13. Inspect the air conditioning refrigerant temperature sensor through the newly drilled hole. The air conditioning refrigerant temperature sensor should be secure to the center of the evaporator core.
    14. Fig 5: Refrigerant Temperature Sensor
    GM2851890Courtesy of GENERAL MOTORS COMPANY
  14. If the air conditioning refrigerant temperature sensor (1) is not secured to the evaporator core (2), use a pair of long needle nose pliers to grip the air conditioning refrigerant temperature sensor at the plastic base, and insert air conditioning refrigerant temperature sensor into the evaporator core.
  15. Perform the air conditioning refrigerant temperature sensor calibration check using the scan tool.
  16. If it is determine that the air conditioning refrigerant temperature sensor is defective and needs to be replaced, use a pair of long needle nose pliers to grip the air conditioning refrigerant temperature sensor at the plastic base. Pull the air conditioning refrigerant temperature sensor out away from the evaporator core and out of the newly drilled hole.
  17. Secure 1 wire, 30 inches (762 mm) in length to the air conditioning refrigerant temperature sensor side of the sensor.
  18. Secure 1 wire, 30 inches (762 mm) in length to the air conditioning refrigerant temperature sensor connector side of the sensor.
    19. Fig 6: Refrigerant Temperature Sensor Harness Grommet
    GM2851619Courtesy of GENERAL MOTORS COMPANY
  19. Remove the air conditioning refrigerant temperature sensor harness grommet (1) from the top of the air conditioning and heater module assembly (2).
    20. Fig 7: Refrigerant Temperature Sensor
    GM2851722Courtesy of GENERAL MOTORS COMPANY
  20. Pull the air conditioning refrigerant temperature sensor (1) up and out of the air conditioning and heater module assembly (2), leaving part of the secured wire exiting the newly drilled hole.
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