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HOMESERVICE MANUALSCHEVROLET2000CAB & CHASSIS K2500, 7.4 J, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1165 (HEATING, VENTILATION AND AIR CONDITIONING)REPAIR INSTRUCTIONSHVAC MODULE ASSEMBLY REPLACEMENTREMOVAL PROCEDURE
2000 Chevrolet Cab & Chassis K2500, 7.4 J, Automatic

Removal Procedure

2000 Chevrolet Cab & Chassis K2500, 7.4 J, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
  2. Drain the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
  3. Remove the wiper motor module assembly. Refer to Wiper Motor Module Replacement in Body and Accessories.
    4. IMPORTANT: The defroster door must be closed to allow clearance during defroster duct removal.
  4. Set the HVAC controls in the vent setting to close the defroster door.
  5. Remove the blower motor. Refer to Blower Motor Replacement .
    6. Fig 1: Locating Electrical Connector From The Blower Motor Resistor
    GM295302Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the electrical connector from the blower motor resistor.
    7. Fig 2: View Of Electrical Connector From The Evaporator Temperature Sensor
    GM629049Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the electrical connector from the evaporator temperature sensor.
  8. Disconnect all of the HVAC electrical actuator connectors.
  9. Remove the I/P carrier. Refer to Instrument Panel (I/P) Carrier Replacement in Instrument Panel, Gages and Console.
    10. Fig 3: View Of Brake Booster
    GM628874Courtesy of GENERAL MOTORS CORP.
  10. Remove the evaporator outlet tube nut.
  11. Disconnect the evaporator outlet and inlet tubes from the TXV.
  12. Disconnect the heater inlet hose from the heater core. Refer to Heater Hose Replacement - Inlet (LA1)  or Heater Hose Replacement - Inlet (LY7) .
  13. Disconnect the heater outlet hose from the heater core. Refer to Heater Hose Replacement - Outlet (LA1)  or Heater Hose Replacement - Outlet (LY7) .
    14. Fig 4: Locating HVAC Module To Dash Panel Sound Barrier Nuts
    GM656207Courtesy of GENERAL MOTORS CORP.
  14. Remove the HVAC module to dash panel sound barrier nuts.
  15. Remove the HVAC module assembly from the cowl.
RENDER: 1.0x

NO RELATED

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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.