GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 Envoy XUV 🢒 Engine 🢒 Engine Cooling 🢒 Auxiliary Water Pump Replacement

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure
  1. Partially drain the cooling system. Refer to Cooling System Draining and Filling .
  2. If equipped with a L6 engine, remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  3. If equipped with a V8 engine, remove the air conditioning accumulator. Refer to Air Conditioning Accumulator Replacement .

    4. Object Number: 1685507 Size: SH
  4. Use J 38185 to reposition the front heater inlet hose clamp from the auxiliary heater water pump.
  5. Remove the front heater inlet hose (1) from the auxiliary heater water pump.
  6. Use J 38185 to reposition the top heater inlet hose clamp from the auxiliary heater water pump.
  7. Remove the top heater inlet hose (2) from the auxiliary heater water pump.
  8. Disconnect the auxiliary heater water pump electrical connector.

    9. Object Number: 1685505 Size: SH
  9. Remove the auxiliary heater water pump bracket retaining nuts.
  10. Remove the auxiliary heater water pump from the vehicle.

    11. Object Number: 1685506 Size: SH
  11. Remove the clips from the auxiliary heater water pump bracket.
  12. Remove the auxiliary heater water pump from the auxiliary heater water pump bracket.

Installation Procedure

    Object Number: 1685506 Size: SH
  1. Install the auxiliary heater water pump to the auxiliary heater water pump bracket.
  2. Install the auxiliary heater water pump retaining clips.

    3. Object Number: 1685505 Size: SH
  3. Install the auxiliary heater water pump to the vehicle.

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

  4. Install the auxiliary heater water pump bracket retaining.

    5. Tighten
    Tighten the nuts to 9 N·m (80 lb in).

  5. Connect the auxiliary heater water pump electrical connector.

    6. Object Number: 1685507 Size: SH
  6. Install the top heater inlet hose (2) to the auxiliary heater water pump.
  7. Use J 38185 to reposition the top heater inlet hose clamp.
  8. Install the front heater inlet hose (1) to the auxiliary heater water pump.
  9. Use J 38185 to reposition the front heater inlet hose clamp to the auxiliary heater water pump.
  10. If equipped with a L6 engine, install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  11. If equipped with a V8 engine, install the air conditioning accumulator. Refer to Air Conditioning Accumulator Replacement .
  12. Fill the cooling system. Refer to Cooling System Draining and Filling .