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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 910 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Heater Hose Replacement - Outlet (4.3L) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Apply lubricant, GM P/N 9985662, to each end of the outlet heater hose.

    Important:  When installing new outlet heater hose, place the clamp on the hose before installing the hose to the vehicle.

  2. Install the outlet heater hose to the vehicle.
  3. Install the heater outlet hose to the water pump.
  4. Install the heater outlet hose clamp using the J 38185  at the water pump.
  5. Install the heater inlet hose to the intake manifold fitting.
  6. Install the heater inlet hose clamp using the J 38185  at the intake manifold fitting.
    Fig 1: Installing Heater Inlet Hose To Intake Manifold Fitting
    G01466956Courtesy of GENERAL MOTORS CORP.
  7. Install the outlet heater hose to the heater core.
  8. Install the outlet heater hose clamp using the J 38185  at the heater core.
    Fig 2: Installing Outlet Heater Hose To Heater Core
    G01466957Courtesy of GENERAL MOTORS CORP.
  9. Install the heater outlet hose to the retaining clip at the engine water outlet.
    Fig 3: Installing Heater Outlet Hose To Retaining Clip
    G01466958Courtesy of GENERAL MOTORS CORP.
  10. Place the outlet heater hose in the retaining clip above the right side valve cover.
  11. Close the retaining clip. Ensure that the clip locks.
  12. Fill the engine cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM in Engine Cooling.
    Fig 4: Close Retaining Clip
    G01466959Courtesy of GENERAL MOTORS CORP.
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