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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 864 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> HVAC Module Assembly Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-Fill) .
    2. Fig 1: Identifying Heater Hose To Heater Core Fittings
    GM362171Courtesy of GENERAL MOTORS CORP.
  2. Using the J 43181  disconnect the inlet heater hose from the heater core.
    1. Install the J 43181  to the heater core pipe.
    2. Close the tool around the heater core pipe.
    3. Firmly pull the tool into the quick connect end of the heater hose.
    4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the inlet hose from the heater core.
  3. Using the J 43181  disconnect the surge tank outlet hose from the heater core.
    1. Install the J 43181  to the heater core pipe.
    2. Close the tool around the heater core pipe.
    3. Firmly pull the tool into the quick connect end of the heater hose.
    4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the surge tank outlet hose from the heater core.
  4. Remove the upper intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  5. Remove the battery. Refer to Battery Replacement .
  6. Remove the accumulator. Refer to Accumulator Replacement .
  7. Remove the instrument panel carrier. Refer to Instrument Panel Carrier Support Replacement (without RPO SLT) or Instrument Panel Carrier Support Replacement (with RPO SLT) .
    8. Fig 2: View Of HVAC Module, Nuts & Bolts
    GM1698730Courtesy of GENERAL MOTORS CORP.
  8. Remove the nuts (2) from the HVAC module (3).
  9. Remove the bolts (1) from the HVAC module (3).
  10. Remove the HVAC module (3).
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