GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC P42 Commercial Chassis 🢒 Engine 🢒 Engine Mechanical - 6.5L 🢒 Intake Manifold Removal

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
  2. Loosen the fuel hose clamps at the fuel filter assembly.
  3. Remove the fuel hoses from the fuel filter assembly.
  4. Disconnect the fuel manager/filter electrical connector.

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

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

    7. Object Number: 26781 Size: SH
  7. Remove the glow plug relay retaining nuts.
  8. Remove the glow plug relay.

    9. Object Number: 25300 Size: SH
  9. Disconnect the vacuum harness hose connectors.
  10. Remove the vacuum harness.
  11. Remove the vacuum solenoid retaining bolt(s) (2).
  12. Remove the vacuum solenoid(s) (1).

    13. Object Number: 26958 Size: SH
  13. Remove the vacuum solenoid mounting bracket retaining nuts.
  14. Remove the vacuum solenoid mounting bracket.

    15. Object Number: 177108 Size: SH
  15. Remove the turbocharger oil feed line mounting bracket retaining nut.
  16. 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.

    17. Object Number: 59835 Size: SH
  17. Remove the intake manifold bolts.
  18. Remove the intake manifold.
  19. Remove the gaskets.

Intake Manifold Removal L65


    Object Number: 73425 Size: SH
  1. Disconnect the Intake Air Temperature (IAT) sensor electrical connector.
  2. Remove the IAT sensor.

    3. Object Number: 26957 Size: SH
  3. Disconnect the Manifold Absolute Pressure (MAP) sensor electrical connector.
  4. Remove the MAP sensor retaining bolts.
  5. Remove the MAP sensor.
  6. Remove the gasket.

    7. Object Number: 177115 Size: SH
  7. Remove the turbocharger short brace retaining bolts.
  8. Remove the turbocharger short brace.
  9. Remove the turbocharger long brace retaining bolt.
  10. Remove the turbocharger long brace retaining nut.
  11. Remove the turbocharger long brace.

    12. Object Number: 59746 Size: SH
  12. Loosen the turbocharger connection hose clamps.
  13. Loosen the turbocharger connection hose.
    14. 13.1. Insert a small flat screwdriver blade between the turbocharger connection hose and the turbocharger and slide the screwdriver blade along the surface of the turbocharger until the hose twists freely.
    13.2. Insert a small flat screwdriver blade between the turbocharger connection hose and the upper intake manifold and slide the screwdriver blade along the surface of the upper intake manifold until the hose twists freely.

    Object Number: 59749 Size: SH
  14. Remove the upper intake manifold retaining bolts.
  15. Remove the upper intake manifold.
  16. Remove the gasket.
  17. Remove the intake manifold.