GM Service Manual Online
For 1990-2009 cars only

Water Outlet Tube Replacement 6.6L LMM

Removal Procedure


    Object Number: 1335388  Size: SH
  1. Drain the cooling system. Refer to Cooling System Draining and Filling.
  2. Remove the charge air cooler inlet pipe. Refer to Charge Air Cooler Inlet Pipe and Outlet Pipe Replacement.
  3. Remove the radiator inlet hose. Refer to Radiator Inlet Hose Replacement.
  4. Remove the turbocharger coolant bypass valve. Refer to Turbocharger Coolant Bypass Valve Replacement.
  5. Remove the bolt and wiring harness bracket at the thermostat housing.

  6. Object Number: 1334916  Size: SH
  7. Remove the main engine electrical harness connector bracket bolts.

  8. Object Number: 1731857  Size: SH
  9. Disconnect the turbocharger vane position sensor electrical connector.

  10. Object Number: 1869687  Size: SH
  11. Remove the main electrical harness bracket bolts.
  12. Remove the main electrical harness bracket.

  13. Object Number: 1869796  Size: SH
  14. Remove the water outlet bolts.
  15. Remove the Idle Air Temperature sensor from the pipe.

  16. Object Number: 1335393  Size: SH
  17. Remove the water outlet.
  18. Remove and discard the O-ring seal.

Installation Procedure


    Object Number: 1335393  Size: SH
  1. Install a NEW O-ring seal to the water outlet.
  2. Lubricate the O-ring seal with clean engine coolant.
  3. Install the water outlet.
  4. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1869796  Size: SH
  5. Install the water outlet bolts.
  6. Tighten
    Tighten the bolts to 21 N·m (15 lb ft).


    Object Number: 1869687  Size: SH
  7. Install the main electrical harness bracket.
  8. Install the main electrical harness bracket bolts.
  9. Tighten
    Tighten the bolts to 21 N·m (15 lb ft).


    Object Number: 1731857  Size: SH
  10. Connect the turbocharger vane position sensor electrical connector.

  11. Object Number: 1334916  Size: SH
  12. Install the main engine electrical harness connector bracket bolts.
  13. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1335388  Size: SH
  14. Install the wiring harness bracket and bolt to the thermostat housing.
  15. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  16. Install the turbocharger coolant bypass valve. Refer to Turbocharger Coolant Bypass Valve Replacement.
  17. Install the radiator inlet hose. Refer to Radiator Inlet Hose Replacement.
  18. Install the charge air cooler inlet pipe. Refer to Charge Air Cooler Inlet Pipe and Outlet Pipe Replacement.
  19. Fill the cooling system. Refer to Cooling System Draining and Filling.