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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 574 (HVAC SYSTEM - AUTOMATIC)REPAIR INSTRUCTIONSAIR CONDITIONING REFRIGERANT TEMPERATURE SENSOR REPLACEMENTREMOVAL PROCEDURE
2009 Chevrolet Tahoe Base, 4.8 C

Removal Procedure

2009 Chevrolet Tahoe Base, 4.8 CSECTION Removal Procedure
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. 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 (Except Cadillac) , Instrument Panel Compartment Door Replacement (Cadillac) .
  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 (Cadillac) , Instrument Panel Insulator Replacement (Except Cadillac)
  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
    GM2851632Courtesy of GENERAL MOTORS COMPANY
  7. Open the template by clicking on the magnifying glass.
  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 3: 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 4: 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 5: 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 6: 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.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.