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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1175 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Heater Core Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the HVAC module. Refer to HVAC MODULE ASSEMBLY REPLACEMENT  .
  2. Remove the heater core outlet cover screws.
  3. Remove the heater core outlet cover.
    Fig 1: Removing Heater Core Outlet Cover
    G01418765Courtesy of GENERAL MOTORS CORP.
  4. Remove the heater core cover screws.
  5. Remove the heater core cover.
    Fig 2: Removing Heater Core Cover
    G01418766Courtesy of GENERAL MOTORS CORP.
  6. Remove and discard the seals (1,2,3) from the heater core cover.
    Fig 3: Removing Seals From Heater Core Cover
    G01418767Courtesy of GENERAL MOTORS CORP.
  7. Remove and discard the heater core outer seal (5) from the heater core.
    Fig 4: Removing Heater Core Outer Seal From Heater Core
    G01418768Courtesy of GENERAL MOTORS CORP.
  8. Remove the heater core retaining clamp screw (1).
  9. Remove the heater core retaining clamp.
  10. Remove the heater core pipe retainer clamp screw (2).
    Fig 5: Identifying Heater Core Retaining Clamp Screws
    G01418769Courtesy of GENERAL MOTORS CORP.
  11. Remove the heater core from the HVAC module case - lower.
    Fig 6: Removing Heater Core From HVAC Module Case - Lower
    G01418770Courtesy of GENERAL MOTORS CORP.
  12. Remove and discard the heater core lower seal (4) from the HVAC module case - lower.
    Fig 7: Removing Heater Core Lower Seal From HVAC Module Case - Lower
    G01418771Courtesy of GENERAL MOTORS CORP.
  13. Remove and discard the heater core center seal (3) from the HVAC module case - lower.
    Fig 8: Removing Heater Core Center Seal From HVAC Module Case - Lower
    G01418772Courtesy of GENERAL MOTORS CORP.
  14. Remove and discard the heater core upper seal (2) from the HVAC module case - lower.
    Fig 9: Removing Heater Core Upper Seal From HVAC Module Case - Lower
    G01418773Courtesy of GENERAL MOTORS CORP.
  15. Remove and discard the heater core side seals (1) from the HVAC module case - lower.
    Fig 10: Removing Heater Core Side Seals From HVAC Module Case - Lower
    G01418774Courtesy of GENERAL MOTORS CORP.
  16. Remove the heater core pipe retainer clamp from the heater core pipes.

    Using a flat bladed tool, release the retaining tab and open the clamp.

    Fig 11: Removing Heater Core Pipe Retainer Clamp From Heater Core Pipes
    G01418775Courtesy of GENERAL MOTORS CORP.
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