GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 SSR 🢒 Engine 🢒 Engine Cooling 🢒 Coolant Heater Replacement

Removal Procedure

    Object Number: 661139 Size: SH
  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Disconnect the coolant heater electrical connector (2).

    4. Object Number: 661276 Size: SH

    Important: Do not score the surface of the engine block hole when removing the coolant heater.

  4. Remove the coolant heater from the engine block.
  5. Remove any burrs, sealer, paint or other rough spots.

Installation Procedure

    Object Number: 661276 Size: SH
  1. If re-using the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the coolant heater to the engine block.

    3. Tighten
    Tighten the coolant heater to 50 N·m (37 lb ft).


    Object Number: 661139 Size: SH

    Notice: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.

  3. Connect the coolant heater electrical connector (2).
  4. Lower the vehicle.
  5. Fill the cooling system. Refer to Cooling System Draining and Filling .