GM Service Manual Online
For 1990-2009 cars only

Intake Manifold Removal L57, L65


    Object Number: 55513  Size: SH
  1. Remove the fuel manager/filter assembly retaining bolts.

  2. Object Number: 59758  Size: SH
  3. Loosen the fuel hose clamps at the fuel filter assembly.
  4. Remove the fuel hoses from the fuel filter assembly.
  5. Disconnect the fuel manager/filter electrical connector.

  6. Object Number: 59759  Size: SH
  7. Remove the fuel filter assembly.

  8. Object Number: 26780  Size: SH
  9. Disconnect the glow plug relay electrical connectors.

  10. Object Number: 26781  Size: SH
  11. Remove the glow plug relay retaining nuts.
  12. Remove the glow plug relay.

  13. Object Number: 25300  Size: SH
  14. Disconnect the vacuum harness hose connectors.
  15. Remove the vacuum harness.
  16. Remove the vacuum solenoid retaining bolt(s) (2).
  17. Remove the vacuum solenoid(s) (1).

  18. Object Number: 26958  Size: SH
  19. Remove the vacuum solenoid mounting bracket retaining nuts.
  20. Remove the vacuum solenoid mounting bracket.

  21. Object Number: 177108  Size: SH
  22. Remove the turbocharger oil feed line mounting bracket retaining nut.
  23. Remove the turbocharger oil feed line mounting bracket. Gently pull the bracket from the turbocharger oil feed line at a 45 degree angle to separate.

  24. Object Number: 59835  Size: SH
  25. Remove the intake manifold bolts.
  26. Remove the intake manifold.
  27. Remove the gaskets.

Intake Manifold Removal Upper


    Object Number: 59746  Size: SH
  1. Remove the clamp at the turbocharger connection hose.
  2. Loosen the sealer by running a small flatblade screwdriver between the hose and the upper intake manifold.

  3. Object Number: 59747  Size: SH
  4. Remove the turbocharger short brace bolt and the turbocharger short brace.

  5. Object Number: 59748  Size: SH
  6. Remove the six upper intake manifold bolts.
  7. For the L56 model, remove the EGR valve and gasket.
  8. Remove the upper intake manifold and gasket.
  9. For the L56 model, remove the EGR tower gasket on the round center portion of the intake manifold.
  10. Install the J 39664 to the turbocharger.