GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Uplander Ext. 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Coolant Heater Replacement

Removal Procedure

    Object Number: 1680725 Size: SH
  1. Drain the engine coolant. Refer to Cooling System Draining and Filling .
  2. Disconnect the coolant heater cord (1) from the heater.

    3. Object Number: 1644185 Size: SH

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

  3. Remove the coolant heater.

Installation Procedure

    Object Number: 1644185 Size: SH
  1. Remove any burrs, sealer, paint or other foreign material from the threads/sealing surface of the engine block and from the old coolant heater if the heater is to be reused.
  2. If reusing the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads.

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the coolant heater to the engine block and tighten to 50 N·m (37 lb ft) .

    4. Object Number: 1680725 Size: SH
  4. Connect the coolant heater cord (1) to the heater.
  5. Fill the cooling system. Refer to Cooling System Draining and Filling .