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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 309 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Auxiliary Heater Pipe Replacement >> Installation Procedure

Installation Procedure

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NOTE:

The replacement A/C and heater pipes are shipped in two sections and spliced together upon installation. Refer to Auxiliary Heater and Air Conditioning Pipe Repair .

  1. Install the auxiliary heater pipes to the vehicle.
    2. Fig 1: Auxiliary Heater Pipes, Clamps And Heater/A/C Tubes Retaining Nut And Stud
    GM691870Courtesy of GENERAL MOTORS CORP.
  2. Install the auxiliary heater pipes (2) to the clamps (5).
    3. CAUTION:

    Refer to Fastener Caution .

  3. Install the heater/A/C tubes retaining nut (4) to the stud (1) at the frame (6) and tighten to 7 N.m (62 lb in).
    4. Fig 2: Auxiliary Heater Pipes
    GM612548Courtesy of GENERAL MOTORS CORP.
  4. Install the auxiliary heater pipes (2, 3) to the auxiliary heater core.
  5. Install the right front wheelhouse panel. Refer to Front Wheelhouse Liner Replacement - Right Side .
  6. Install the right rear wheelhouse panel. Refer to Rear Wheelhouse Panel Liner Replacement (RPO X88 Chevrolet, RPO O88 GMC) , Rear Wheelhouse Panel Liner Replacement (RPO HP2) .
  7. Install the vehicle right assist step. Refer to Assist Step Replacement (GMC Denali XL) , Assist Step Replacement (Chevrolet HP2) , Assist Step Replacement (Power BRS) , Assist Step Replacement (Z71) .
    8. Fig 3: Auxiliary Heater Pipes At Heater Inlet And Outlet Tees
    GM612571Courtesy of GENERAL MOTORS CORP.
  8. Install the auxiliary heater pipes (1, 2) to the heater inlet and outlet tees (3, 4).
    9. Fig 4: Quick-Connect Fittings
    GM21855Courtesy of GENERAL MOTORS CORP.
  9. Connect the outlet heater hose to the heater core.
  10. Connect the inlet heater hose to the heater core.
  11. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill) .
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