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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 >> Installation Procedure

Installation Procedure

    Fig 1: View Of Intake Manifold-To-Cylinder Head Gasket
    GM1277097Courtesy of GENERAL MOTORS COMPANY
  1. Install NEW intake manifold gaskets (514) to the intake manifold.
    2. Fig 2: Intake Manifold Bolts
    GM1403311Courtesy of GENERAL MOTORS COMPANY
  2. Install the intake manifold (500).
  3. Apply a 5 mm (0.20 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489) to the threads of the intake manifold bolts (512). Refer to Adhesives, Fluids, Lubricants and Sealers for the correct part number.
    4. Fig 3: Identifying Intake Manifold Bolt Tightening Sequence
    GM1552512Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  4. Install the intake manifold bolts.
    1. Tighten the intake manifold bolts a first pass in sequence to 5 N.m (44 lb in).
    2. Tighten the intake manifold bolts a final pass in sequence to 10 N.m (89 lb in).
    5. Fig 4: View Of EVAP Purge Solenoid Bolt, Solenoid & Isolator
    GM389993Courtesy of GENERAL MOTORS COMPANY
  5. Install the EVAP purge solenoid (3), isolator (1) and bolt (2) to the intake manifold. Tighten the EVAP purge solenoid bolt to 10 N.m (89 lb in).
    6. Fig 5: View Of EVAP Purge Solenoid Vent Tube
    GM372717Courtesy of GENERAL MOTORS COMPANY
  6. Install the EVAP purge solenoid vent tube to the solenoid (1) and vapor pipe.
  7. Install the engine coolant air bleed clamp and hose to the throttle body, if applicable.
    8. Fig 6: MAP Sensor
    GM1401987Courtesy of GENERAL MOTORS COMPANY
  8. Lubricate the MAP sensor grommet (715) with clean engine oil.
  9. Install the grommet onto the MAP sensor (714).
  10. Install the MAP sensor (714) and the retainer (736).
    11. Fig 7: View Of Positive Crankcase Ventilation (PCV) Hose
    GM1905664Courtesy of GENERAL MOTORS COMPANY
  11. Install the PCV hose - dirty air (716).
    12. Fig 8: View Of MAP Sensor & Knock Sensor Electrical Connectors
    GM679510Courtesy of GENERAL MOTORS COMPANY
  12. Connect the knock sensor harness electrical connector to the intake manifold.
  13. Connect the following electrical connectors:
    • MAP sensor (1)
    • Knock sensor (2)
    • Exhaust gas recirculation (EGR) valve, if equipped
  14. Install the fuel injectors. Refer to Fuel Injector Replacement , Fuel Injector Replacement (LPG 3 Tank) .
  15. Install the throttle body. Refer to Throttle Body Assembly Replacement .
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