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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Heater Inlet and Outlet Hose Replacement (LT4) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM5758506Courtesy of GENERAL MOTORS COMPANY

    Heater Inlet and Outlet Hose (1) @ Engine Coolant Manifold - Install

  2. Heater Inlet Hose Clamp (2) - Engage [2x] - Hose Clamp Replacement Guidelines - Spring Type
  3. GM5758200Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Heater Inlet and Outlet Hose Nut (1) - Install and tighten to 9 N.m (80 lb in)

  4. Heater Inlet and Outlet Hose (2) @ Heater Core - Install
  5. Retainer (3) - Engage [2x]
  6. GM5754358Courtesy of GENERAL MOTORS COMPANY

    Radiator Surge Tank (2) - Install - Radiator Surge Tank Replacement (LT4)

  7. Fill the cooling system to the proper level. Cooling System Draining and Filling (LT4 Static Fill) , or Cooling System Draining and Filling (LT4 GE 47716)
  8. Start the engine and check for coolant leaks.