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Home >> Cadillac >> 2004 >> Escalade EXT >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating, Ventilation & Air Conditioning >> Repair Instructions >> HVAC Module Assembly Replacement >> Installation Procedure

Installation Procedure

    Fig 1: View Of HVAC Module, Bolts & Nuts
    GM810832Courtesy of GENERAL MOTORS CORP.
  1. If replacing the HVAC module, transfer the components from the old HVAC module as necessary.
  2. Install the HVAC module (2) to the vehicle (1).
  3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the nuts (4) to the HVAC module (2).

    Tighten:  Tighten the nuts to 9 N.m (80 lb in).

  5. Install the bolts (4) to the HVAC module (2).

    Tighten:  Tighten the bolts to 4 N.m (35 lb in).

  6. Connect the electrical harnesses and the ground connections.
  7. Install the HVAC module drain hose.
  8. Install the instrument panel carrier. Refer to Instrument Panel (I/P) Carrier Replacement in Instrument Panel, Gages and Console.
  9. Install the accumulator. Refer to Accumulator Replacement .
  10. Fig 2: Removing/Installing Heater Hose To Engine
    GM363237Courtesy of GENERAL MOTORS CORP.
  11. Install the surge tank outlet hose to the heater core.

    Firmly push the quick connect onto the heater core pipe until you hear an audible click.

  12. Install the inlet heater hose to the heater core.

    Firmly push the quick connect onto the heater core pipe until you hear an audible click.

  13. Fill the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.