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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 368 (HEATING, VENTILATION AND AIR CONDITIONING)REPAIR INSTRUCTIONSHVAC MODULE ASSEMBLY REPLACEMENT
2006 Chevrolet Cobalt SS, 4D Sedan, Standard

HVAC Module Assembly Replacement

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION HVAC Module Assembly Replacement
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Replacing HVAC Module Assembly
GM1614647Courtesy of GENERAL MOTORS CORP.
HVAC Module Assembly Replacement

Callout Component Name
NOTE: Refer to Fastener Notice .
Fastener Tightening Specifications:  Refer to Fastener Tightening Specifications 
CAUTION: Refer to Battery Disconnect Caution

Preliminary Procedure

  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (RPOs LZE/LZ4/LZ9) or Battery Negative Cable Disconnect/Connect Procedure (RPO LS4)
  2. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging 
  3. Drain the cooling system. Refer to Draining and Filling Cooling System (LS4 Static Fill) or Draining and Filling Cooling System (LZE, LZ4, LZ9 Static Fill) or Draining and Filling Cooling System (9C1, 9C3 Static Fill) or Draining and Filling Cooling System (LS4 GE 47716 Fill) or Draining and Filling Cooling System (LZE, LZ4, LZ9, 9C1, 9C3 GE 4771 Fill)
  4. Remove the inlet heater hose from the heater core. Refer to Heater Hose Replacement - Inlet (RPO LS4)  or Heater Hose Replacement - Inlet (RPOs LZE, LZ4, LZ9) 
  5. Remove the outlet heater hose from the heater core. Refer to Heater Hose Replacement - Outlet (RPO LS4)  or Heater Hose Replacement - Outlet (RPOs LZE, LZ4, LZ9) 
  6. Remove the air conditioning evaporator thermal expansion valve tube from the thermal expansion valve. Refer to Air Conditioning Evaporator Thermal Expansion Valve Tube Replacement 
  7. Remove the evaporator drain tube from the evaporator case.
  8. Remove the instrument panel (I/P) carrier. Refer to Instrument Panel (I/P) Carrier Replacement
1 Nut, Heater and Air Conditioning Module

Tighten:  10 N.m (89 lb in)
2 Module Assembly, Heater and Air Conditioning Evaporator
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.