LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1618 (Engine Mechanical - 4.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Intake Manifold Replacement - Upper >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the fuel pipes/hoses. Refer to FUEL HOSES & PIPES .
  2. Disconnect the cruise control cable from the throttle lever, if equipped.
  3. Remove the cruise control cable from the accelerator control cable bracket, if equipped.
    Fig 1: Cruise Control Cable & Accelerator Control Cable Bracket
    G02105744Courtesy of GENERAL MOTORS CORP.
  4. Remove the accelerator cable from the throttle body lever.
    Fig 2: Throttle Body Lever
    G02105745Courtesy of GENERAL MOTORS CORP.
  5. Remove the accelerator cable from the accelerator control cable bracket.
    Fig 3: Accelerator Cable & Accelerator Control Cable Bracket
    G02105746Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the following electrical connectors:
    • The air conditioning (A/C) compressor clutch (1), if equipped
    • The A/C pressure switch (4), if equipped
  7. Remove the engine wiring harness clip (3) from the accelerator control cable bracket.
    Fig 4: A/C Compressor Clutch, Switch & Engine Wiring Harness Clip
    G02105747Courtesy of GENERAL MOTORS CORP.
  8. Remove the accelerator control cable bracket nuts.
  9. Remove the accelerator control cable bracket with the cables attached, from the throttle body.
  10. Reposition and secure the bracket and cables out of the way.
    Fig 5: Accelerator Control Cable, Bracket & Nuts
    G02105748Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the following electrical connectors:
    • The throttle position (TP) sensor (1)
    • The idle air control (IAC) motor (2)
    • The control port injector module (3)
  12. Remove the engine wiring harness clip bolt (4).
    Fig 6: Throttle Position (TP) Sensor, Idle Air Control (IAC), Control Port Injector Module & Harness Clip Bolt
    G02105749Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the following electrical connectors:
    • The evaporative emission (EVAP) canister purge solenoid valve (1)
    • The manifold absolute pressure (MAP) sensor (2)
    Fig 7: Evaporative Emission (EVAP) Canister Purge Solenoid Valve & Manifold Absolute Pressure (MAP) Sensor
    G02105750Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the EVAP canister harness from the purge solenoid valve.
    Fig 8: EVAP Canister Harness & Purge Solenoid Valve
    G02105751Courtesy of GENERAL MOTORS CORP.
  15. Remove the engine wiring harness bracket nuts.
  16. Remove the engine wiring harness bracket.
    Fig 9: Engine Wiring Harness Bracket & Nuts
    G02105752Courtesy of GENERAL MOTORS CORP.
  17. Remove the engine wiring harness ground nut and ground wire (4) from the rear of the right cylinder head.
    Fig 10: Engine Wiring Harness Ground Nut & Wire
    G02105753Courtesy of GENERAL MOTORS CORP.
  18. Remove the engine wiring harness rear bracket nut at the EVAP canister purge solenoid valve.
  19. Remove the stud holding the engine wiring harness bracket.
  20. Reposition the engine wiring harness with the bracket aside.
    Fig 11: Engine Wiring Harness Rear Bracket & Nut
    G02105754Courtesy of GENERAL MOTORS CORP.
  21. Remove the PCV valve hose from the valve and rocker cover.
    Fig 12: PCV Valve Hose
    G02105755Courtesy of GENERAL MOTORS CORP.
  22. Disconnect the power brake booster vacuum hose from the vacuum fitting.
    Fig 13: Power Brake Booster Vacuum Hose & Vacuum Fitting
    G02105756Courtesy of GENERAL MOTORS CORP.
  23. Remove the accelerator cable bracket nuts.
  24. Remove the accelerator cable bracket.
    Fig 14: Accelerator Cable Bracket & Nuts
    G02105757Courtesy of GENERAL MOTORS CORP.
  25. Remove the intake manifold-upper studs.
  26. Remove the front two throttle body studs.
  27. Remove the intake manifold-upper.
    Fig 15: Intake Manifold & Studs
    G02105758Courtesy of GENERAL MOTORS CORP.
  28. Remove and discard the intake manifold-upper gasket.
    Fig 16: Intake Manifold Upper Gasket
    G02105759Courtesy of GENERAL MOTORS CORP.
  29. Remove and discard the O-ring seal from the fuel meter body.
    Fig 17: O-Ring Seal
    G02105760Courtesy of GENERAL MOTORS CORP.
  30. If required, remove the power brake booster vacuum fitting.
  31. Remove and discard the O-ring seal.
    Fig 18: Power Brake Booster Vacuum Fitting & O-Ring Seal
    G02105761Courtesy of GENERAL MOTORS CORP.
  32. If required, remove the PCV valve cover.
  33. Remove and discard the O-ring seal.
    Fig 19: PCV Valve Cover & O-Ring Seal
    G02105762Courtesy of GENERAL MOTORS CORP.
  34. If required, remove the rear throttle body stud.
  35. Remove the throttle body.
  36. Remove and discard the throttle body gasket.
    Fig 20: Throttle Body Throttle & Gasket
    G02105763Courtesy of GENERAL MOTORS CORP.
  37. If required, remove the MAP sensor.
  38. Remove and discard the MAP sensor seal.
    Fig 21: MAP Sensor & Seal
    G02105764Courtesy of GENERAL MOTORS CORP.
  39. If required, remove the EVAP canister purge solenoid valve studs.
  40. Remove the purge solenoid valve.
  41. Clean and inspect the intake manifold-upper, if necessary. Refer to Intake Manifold Cleaning and Inspection .
    Fig 22: EVAP Canister Purge Solenoid Valve
    G02105765Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals