GM Service Manual Online
For 1990-2009 cars only

Turbocharger Coolant Bypass Valve Replacement 6.6L Engine

Removal Procedure


    Object Number: 1335386  Size: SH
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  2. Drain the cooling system. Refer to Cooling System Draining and Filling .
  3. Reposition the coolant inlet hose clamp.
  4. Disconnect the turbocharger coolant inlet hose from the turbocharger bypass valve.

  5. Object Number: 687052  Size: SH
  6. Remove the turbocharger bypass valve and washer.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 687052  Size: SH
  1. Install the turbocharger bypass valve and washer.
  2. Tighten
    Tighten the valve to 60 N·m (44 lb ft).


    Object Number: 1335386  Size: SH
  3. Connect the turbocharger coolant inlet hose to the turbocharger bypass valve.
  4. Position the coolant inlet hose clamp.
  5. Fill the cooling system. Refer to Cooling System Draining and Filling .
  6. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .