GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Electrical 🢒 Auxiliary Water Pump Replacement

Removal Procedure

    Object Number: 1206678 Size: SH
  1. Drain the cooling system. Refer to Generator Control Module Cooling System Draining and Filling .
  2. Reposition the front heater inlet hose clamp (4) from the auxiliary water pump (1).
  3. Remove the front heater inlet hose (6) from the auxiliary water pump (1).
  4. Reposition the rear heater inlet hose clamp (2) from the auxiliary water pump (1).
  5. Remove the rear heater inlet hose (3) from the auxiliary water pump (1).
  6. Remove the heater outlet hose from the clip.

    7. Object Number: 1285618 Size: SH
  7. Disconnect the electrical connector (1) from the auxiliary water pump (2).

    8. Object Number: 1285626 Size: SH
  8. Remove the nuts (4) from the auxiliary water pump bracket (1).
  9. Remove the auxiliary water pump (1) from the vehicle.

    10. Object Number: 1285746 Size: SH
  10. Remove the clips (2) from the auxiliary water pump bracket (1).
  11. Remove the auxiliary water pump (3) from the auxiliary water pump bracket (1).

Installation Procedure

    Object Number: 1285746 Size: SH
  1. Install the auxiliary water pump (3) to the auxiliary water pump bracket (1).
  2. Install the clips (2) to the auxiliary water pump bracket (1).

    3. Object Number: 1285626 Size: SH
  3. Install the auxiliary water pump (1) to the vehicle.

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

  4. Install the nuts (4) to the auxiliary water pump bracket (1).

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


    Object Number: 1285618 Size: SH
  5. Connect the electrical connector (1) to the auxiliary water pump (2).

    6. Object Number: 1206678 Size: SH
  6. Install the heater outlet hose to the clip.
  7. Install the rear heater inlet hose (3) to the auxiliary water pump (1).
  8. Position the rear heater inlet hose clamp (2) to the auxiliary water pump (1).
  9. Install the front heater inlet hose (6) to the auxiliary water pump (1).
  10. Position the front heater inlet hose clamp (4) to the auxiliary water pump (1).
  11. Fill the cooling system. Refer to Generator Control Module Cooling System Draining and Filling .