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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Auxiliary Heater Pipe Replacement >> Installation Procedure

Installation Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the auxiliary heater pipes to the vehicle.
    2. Fig 1: View Of Auxiliary Heater Pipes, Clamps & Heater/A/C Tubes Retaining Nut & Stud
    GM691870Courtesy of GENERAL MOTORS CORP.
  2. Install the auxiliary heater pipes (2) to the clamps (5).
    3. NOTE: Refer to Fastener Notice .
  3. Install the heater/A/C tubes retaining nut (4) to the stud (1) at the frame (6).

    Tighten:  Tighten the nut to 7 N.m (62 lb in).

    4. Fig 2: View Of 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 .
  6. Install the right rear wheelhouse panel. Refer to Wheelhouse Liner Panel Replacement - Rear .
  7. Install both of the right tires. Refer to Tire and Wheel Removal and Installation .
    8. Fig 3: View Of Auxiliary Heater Pipes At Heater Inlet & 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: Connecting 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 Draining and Filling Cooling System .
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