GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Montana 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Auxiliary Coolant Pump Replacement

Removal Procedure
  1. Drain the Cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.

    2. Object Number: 637763 Size: SH
  2. Disconnect the electrical connector from the auxillary coolant pump.
  3. Remove the auxiliary coolant pump to heater core inlet hose from the auxiliary coolant pump.
  4. Remove the inlet pipe to auxiliary coolant pump hose from the coolant pump.

    5. Object Number: 637502 Size: SH
  5. Remove the auxillary coolant pump retaining clips.
  6. Remove the auxiliary coolant pump from the diagonal brace.

Installation Procedure
  1. Install the auxiliary coolant pump to the diagonal brace.

    2. Object Number: 637502 Size: SH
  2. Install the auxillary coolant pump retaining clips.
  3. Install the inlet pipe to auxiliary coolant pump hose to the coolant pump.
  4. Install the auxiliary coolant pump to heater core inlet hose to the auxiliary coolant pump.

    5. Object Number: 637763 Size: SH
  5. Connect the electrical connector to the auxillary coolant pump.
  6. Refill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.