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Auxiliary Heater Case: Installation

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  1. Install the auxiliary heater into the vehicle. See Fig 2. Raise the vehicle. Support the vehicle with safety stands. Install the retaining nuts to the underside of the auxiliary heater.
  2. Connect the heater lines to the underside of the auxiliary heater. Install the one retaining nut to the auxiliary evaporator underbody rear tube assembly to the core (if equipped).
  3. Install the heater and heater line cover to the underside of the auxiliary heater. See Fig 1. Remove the safety stands. Lower the vehicle.
  4. Connect the electrical connectors to the auxiliary heater. Install the air distribution duct upper. Install the air distribution duct lower.
  5. Install the left rear corner garnish molding. Install the left rear quarter trim panel. Evacuate and recharge the A/C system (if equipped). Fill the engine coolant.
Fig 1: Removing & Installing Heater Line Cover
G00185021Courtesy of GENERAL MOTORS CORP.
Fig 2: Removing & Installing Auxiliary Heater Case
G00067642Courtesy of GENERAL MOTORS CORP.