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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Heater Inlet Hose Replacement (LSY) >> 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. GM5312791Courtesy of GENERAL MOTORS COMPANY

    Heater Inlet Hose (2) @ Engine Coolant Thermostat Housing Pipe - Install

  2. Heater Inlet Hose Retainer (1) - Engage
  3. GM5312790Courtesy of GENERAL MOTORS COMPANY

    Heater Inlet Hose (2) @ Heater Core - Install

  4. Heater Inlet Hose Retainer (1) - Engage
  5. Fill the cooling system to the proper level. Cooling System Draining and Filling (LSY GE 47716) , or Cooling System Draining and Filling (LSY Static Fill)
  6. Start the engine and check for coolant leaks.
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