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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Engine Mechanical - 4.3L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Intake Manifold Disassemble (LU3)

Intake Manifold Disassemble (LU3)

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the nuts, the studs, and the accelerator control cable bracket.
    Fig 1: Removing Nuts, Studs & Accelerator Control Cable Bracket
    G02078160Courtesy of GENERAL MOTORS CORP.
  2. Remove the throttle body attaching studs.
    Fig 2: Removing Throttle Body Attaching Studs
    G02078161Courtesy of GENERAL MOTORS CORP.
  3. Remove the throttle body.
  4. Remove the throttle body to upper intake manifold gasket.
  5. Discard the throttle body to upper intake manifold gasket.
    Fig 3: Removing Throttle Body & Gasket
    G02078162Courtesy of GENERAL MOTORS CORP.
  6. Remove the water outlet studs.
  7. Remove the water outlet (1 or 2).
  8. Remove the engine coolant thermostat.
    Fig 4: Removing Water Outlet Studs, Water Outlet & Engine Coolant Thermostat
    G02078163Courtesy of GENERAL MOTORS CORP.
  9. Remove the engine coolant temperature (ECT) sensor plug (1) or the ECT sensor (2) from the front of the lower intake manifold, if equipped.
    Fig 5: Removing ECT Sensor Plug Or ECT Sensor
    G02078164Courtesy of GENERAL MOTORS CORP.
  10. Remove the studs and the ignition coil.
    Fig 6: Removing Studs & Ignition Coil
    G02078165Courtesy of GENERAL MOTORS CORP.
  11. Remove the manifold absolute pressure (MAP) sensor.
  12. Remove the MAP sensor seal from the MAP sensor.
  13. Discard the MAP sensor seal.
    Fig 7: Removing MAP Sensor & Seal
    G02078166Courtesy of GENERAL MOTORS CORP.
  14. Remove the fuel pipe bolt (4).
  15. Remove the fuel pipe retainer nuts (1).
  16. Remove the fuel pipe retainer (2).
  17. Remove the fuel pipe (3).
  18. Remove and discard the fuel seal retainers (5).
  19. Remove and discard the fuel seals (6), yellow O-rings.
  20. Remove and discard the spacer rings (7), flat washers.
  21. Remove and discard the fuel seals (8), black O-rings.
    Fig 8: Removing Fuel Pipe Components
    G02078167Courtesy of GENERAL MOTORS CORP.
  22. Remove the studs and the evaporative emission (EVAP) canister purge solenoid valve.
  23. Remove the nut and the engine wiring harness bracket.
    Fig 9: Removing Studs & EVAP Canister Purge Solenoid Valve
    G02078168Courtesy of GENERAL MOTORS CORP.
  24. Remove the upper intake manifold attaching studs.
  25. Remove the upper intake manifold.
  26. Remove the upper intake manifold to lower intake manifold gasket.
  27. Discard the upper intake manifold to lower intake manifold gasket.
    Fig 10: Removing Studs, Upper Intake Manifold & Gasket
    G02078169Courtesy of GENERAL MOTORS CORP.
  28. Remove the fuel meter body seal and discard.
  29. Remove the 6 injectors from the lower intake manifold bores.
  30. Remove the fuel meter body.
  31. Remove the bolt and the fuel meter body bracket.
    Fig 11: Removing Injectors & Fuel Meter Body
    G02078170Courtesy of GENERAL MOTORS CORP.
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