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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1392 (Engine Mechanical - 4.3L) >> Repair Instructions - On Vehicle >> Upper Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of A/C Pressure Switch & Compressor Clutch Connectors
    GM1878341Courtesy of GENERAL MOTORS CORP.
  1. Remove the fuel pipes/hoses. Refer to Fuel Line Replacement - Engine .
  2. Disconnect the following electrical connectors:
    • The A/C pressure switch (1), if equipped
    • The air conditioning (A/C) compressor clutch (2), if equipped
    3. Fig 2: Identifying Control Port Injector Module
    GM1878388Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the control port injector module (1).
    4. Fig 3: View Of Engine Wiring Harness Clips
    GM1876870Courtesy of GENERAL MOTORS CORP.
  4. Remove the engine wiring harness clips (1, 2) from the engine harness brackets.
    5. Fig 4: View Of Engine Wiring Harness Rear Bracket & Bolts
    GM1876871Courtesy of GENERAL MOTORS CORP.
  5. Remove the engine wiring harness rear bracket bolts and bracket.
    6. Fig 5: View Of Engine Wiring Harness & Components
    GM1876492Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the following electrical connectors:
    • The evaporative emission (EVAP) canister purge solenoid valve (1)
    • The manifold absolute pressure (MAP) sensor
    7. Fig 6: View Of EVAP Canister Purge Solenoid Valve Tube Quick Connect Fitting
    GM1876612Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the evaporative emission (EVAP) canister purge solenoid valve tube quick connect fitting (1) from the EVAP purge solenoid valve. Refer to Plastic Collar Quick Connect Fitting Service .
  8. Reposition the tube out of the way.
    9. Fig 7: View Of Engine Wiring Harness Ground Nut And Ground Wire
    GM1878506Courtesy of GENERAL MOTORS CORP.
  9. Remove the engine wiring harness ground nut and ground wire (1) from the rear of the right cylinder head.
    10. Fig 8: Locating Engine Wiring Harness Bracket Stud
    GM1878512Courtesy of GENERAL MOTORS CORP.
  10. Remove the stud (1) holding the engine wiring harness bracket.
  11. Reposition the engine wiring harness with the bracket aside.
    12. Fig 9: Locating PCV Valve Hose At Valve & Rocker Cover
    GM869710Courtesy of GENERAL MOTORS CORP.
  12. Remove the positive crankcase ventilation (PCV) valve hose from the valve and rocker cover.
  13. Disconnect the power brake booster vacuum hose from the vacuum fitting.
    14. Fig 10: View Of Intake Manifold Upper Studs
    GM516794Courtesy of GENERAL MOTORS CORP.
  14. Remove the intake manifold - upper studs.
  15. Remove the front 2 throttle body studs.
  16. Remove the intake manifold - upper.
    17. Fig 11: View Of Intake Manifold Upper Gasket
    GM516790Courtesy of GENERAL MOTORS CORP.
  17. Remove and discard the intake manifold - upper gasket.
    18. Fig 12: View Of Fuel Meter Body O-Ring Seal
    GM516773Courtesy of GENERAL MOTORS CORP.
  18. Remove and discard the O-ring seal from the fuel meter body.
    19. Fig 13: View Of Power Brake Booster Vacuum O-Ring Seal
    GM516797Courtesy of GENERAL MOTORS CORP.
  19. If required, remove the power brake booster vacuum fitting.
  20. Remove and discard the O-ring seal.
    21. Fig 14: Identifying PCV Valve Cover
    GM869707Courtesy of GENERAL MOTORS CORP.
  21. If required, remove the PCV valve cover.
  22. Remove and discard the O-ring seal.
    23. Fig 15: View Of Throttle Body & Gasket
    GM12853Courtesy of GENERAL MOTORS CORP.
  23. If required, remove the rear throttle body stud.
  24. Remove the throttle body.
  25. Remove and discard the throttle body gasket.
    26. Fig 16: View Of MAP Sensor
    GM480562Courtesy of GENERAL MOTORS CORP.
  26. If required, remove the MAP sensor.
  27. Remove and discard the MAP sensor seal.
    28. Fig 17: Identifying Purge Solenoid & Nut
    GM1503010Courtesy of GENERAL MOTORS CORP.
  28. If required, remove the EVAP canister purge solenoid valve studs.
  29. Remove the purge solenoid valve.
  30. Clean and inspect the intake manifold - upper, if necessary. Refer to Intake Manifold Cleaning and Inspection .
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