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Home >> Chevrolet >> 2014 >> Express 1500 LS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L (L20), 5.3L (LMF), Or 6.0L (L96 LC8) - Repair Instructions - On Vehicle >> Repair Instructions - On Vehicle >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

    NOTE:

    The intake manifold, throttle body, fuel rail and injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly.

  1. Remove the throttle body. Refer to Throttle Body Assembly Replacement .
  2. Remove the fuel injectors. Refer to Fuel Injector Replacement , Fuel Injector Replacement (LPG 3 Tank) .
    3. Fig 1: View Of MAP Sensor & Knock Sensor Electrical Connectors
    GM679510Courtesy of GENERAL MOTORS COMPANY
  3. Disconnect the following electrical connectors:
    • Manifold absolute pressure (MAP) sensor (1)
    • Knock sensor (2)
  4. Remove the knock sensor harness electrical connector from the intake manifold.
  5. Set the electrical harness aside.
    6. Fig 2: View Of electronic temperature control (ETC) connector
    GM1809532Courtesy of GENERAL MOTORS COMPANY
  6. Disconnect the electronic temperature control (ETC) connector.
    7. Fig 3: View Of Positive Crankcase Ventilation (PCV) Hose
    GM1905664Courtesy of GENERAL MOTORS COMPANY
  7. Remove the positive crankcase ventilation (PCV) hose - dirty air (716).
    8. Fig 4: MAP Sensor
    GM1401987Courtesy of GENERAL MOTORS COMPANY
  8. Remove the MAP sensor (714) and retainer (736) as required.
  9. Remove the O-ring (715) from the sensor, as required.
    10. Fig 5: View Of EVAP Purge Solenoid Vent Tube
    GM372717Courtesy of GENERAL MOTORS COMPANY
  10. Remove the evaporative emission (EVAP) purge solenoid vent tube by performing the following:
    1. Remove the EVAP tube end (2) from the solenoid (1).
    2. Squeeze the EVAP pipe quick connect fitting (3) retainer together.
    3. Remove the EVAP tube end (3) from the vapor pipe.
    11. Fig 6: View Of EVAP Purge Solenoid Bolt, Solenoid & Isolator
    GM389993Courtesy of GENERAL MOTORS COMPANY
  11. Remove the EVAP purge solenoid bolt (2), solenoid (3) and isolator (1) from the intake manifold.
    12. Fig 7: Intake Manifold Bolts
    GM1403311Courtesy of GENERAL MOTORS COMPANY
  12. Remove the intake manifold bolts (512).
  13. Remove the intake manifold (500) with gaskets.
    14. Fig 8: View Of Intake Manifold-To-Cylinder Head Gasket
    GM1277097Courtesy of GENERAL MOTORS COMPANY
  14. Remove the intake manifold gaskets (514).
  15. Discard the intake manifold gaskets.
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