GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Mechanical - 6.6L (LLY) 🢒 Engine Coolant Thermostat Housing Removal

    Object Number: 1334916 Size: SH
  1. Remove the main engine electrical harness connector hold down bolts.

    2. Object Number: 1334921 Size: SH
  2. Remove the main engine electrical harness connectors.
  3. Disconnect and remove the barometric sensor.

    4. Object Number: 1334926 Size: SH
  4. Disconnect and remove the turbocharger vane position sensor.

    5. Object Number: 1334948 Size: SH
  5. Remove the main electrical harness bracket bolts.
  6. Remove the main electrical harness bracket.

    7. Object Number: 1335386 Size: SH
  7. Disconnect the turbocharger coolant inlet hose.

    8. Object Number: 1335388 Size: SH
  8. Remove the electrical harness bracket bolt.
  9. Remove the electrical harness bracket.

    10. Object Number: 1335391 Size: SH
  10. Remove the water outlet bolts.

    11. Object Number: 1335393 Size: SH
  11. Remove the water outlet.

    12. Object Number: 1413481 Size: SH
  12. Remove the oil fill tube bolts.

    13. Object Number: 1413483 Size: SH
  13. Remove the oil fill tube.

    14. Object Number: 1335413 Size: SH
  14. Disconnect the coolant temperature sensor.

    15. Object Number: 1335419 Size: SH
  15. Remove the EGR coolant pipe bolts.
  16. Remove the EGR coolant pipe.

    17. Object Number: 1335424 Size: SH
  17. Remove the water pump inlet pipe bolts.

    18. Object Number: 1335429 Size: SH
  18. Remove the turbocharger coolant outlet hose and clamps.

    19. Object Number: 1335432 Size: SH
  19. Remove the water pump inlet pipe.

    20. Object Number: 1335434 Size: SH
  20. Remove the fuel pipe bracket bolt.

    21. Object Number: 1335441 Size: SH
  21. Remove the thermostat housing bolts.
  22. Remove the thermostat housing.