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 1443 (Engine Mechanical - 4.2L (Ll8)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Relieve the fuel pressure. Refer to Fuel Pressure Relief Procedure .
  2. Remove the throttle body. Refer to Throttle Body Assembly Replacement in Engine Controls - 4.2L.
    3. Fig 1: View Of PCM Assembly
    GM1284769Courtesy of GENERAL MOTORS CORP.
  3. Remove the powertrain control module (PCM) retaining bolts (3) and nuts (6).
  4. Remove the PCM mounting studs (5) and position the PCM out of the way.
    5. Fig 2: View Of Engine Coolant Temperature Electrical Connector
    GM1288027Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the engine coolant temperature (ECT) sensor electrical connector (1).
    6. Fig 3: Fuel Feed And Fuel Return Pipes (Left Side Of Engine)
    GM730718Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fuel and Evaporative Emission (EVAP) Hose/Pipe Connection Cleaning Notice in Cautions and Notices.
  6. Disconnect the fuel feed (1) and fuel return (2) pipes from the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  7. Disconnect the integral clip (3) from the wire harness bracket.
    8. Fig 4: View Of Engine Wire Harness Bracket & Bolts
    GM1348786Courtesy of GENERAL MOTORS CORP.
  8. Remove the engine wire harness bracket bolt.
  9. Position the engine electrical wire harness bracket with wires attached out of the way.
    10. Fig 5: View Of MAP Sensor Electrical Connector
    GM732831Courtesy of GENERAL MOTORS CORP.
  10. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
    11. Fig 6: View Of Crankcase Ventilation Hose Location
    GM637635Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the crankcase ventilation hose from the intake manifold.
    12. Fig 7: Disconnecting/Connecting Vacuum Brake Booster Hose
    GM748028Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the vacuum brake booster hose at the intake manifold.
  13. Remove the generator. Refer to Generator Replacement (4.2L Engine) in Engine Electrical.
    14. Fig 8: View Of Intake Manifold & Bolts
    GM637631Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The intake manifold bolts are captured within the intake manifold. Do not attempt to remove the bolts from the intake manifold.
  14. Loosen the intake manifold bolts.
  15. Remove the intake manifold.
scientia non olet · About LEMON Manuals