Removal Procedure

Important:  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 .
2. Remove the oil fill tube. Refer to Oil Level Indicator and Tube Replacement .
3. Remove the fuel injectors. Refer to FUEL RAIL & INJECTORS .
4. Disconnect the following electrical connectors:
   • Manifold absolute pressure (MAP) sensor (1)
   • Knock sensor (2)
   • Exhaust gas recirculation (EGR) valve, if equipped
     Fig 1: Disconnecting MAP Sensor & Knock Sensor

     Courtesy of GENERAL MOTORS CORP.
5. Remove the knock sensor harness electrical connector from the intake manifold.
6. Set the electrical harness aside.
7. If equipped, remove the following EGR pipe bolts:
   • Intake manifold (1)
   • Cylinder head (2)
   • Exhaust manifold (3)
8. If equipped, remove the EGR pipe (with valve).
9. If equipped, remove the EGR pipe gasket from the exhaust manifold.
   Fig 2: Removing EGR Pipe Bolts

   Courtesy of GENERAL MOTORS CORP.
10. Remove the positive crankcase ventilation (PCV) hose (with valve).
    Fig 3: Removing PCV Hose

    Courtesy of GENERAL MOTORS CORP.
11. Remove the MAP sensor (1) from the intake manifold.
    Fig 4: Removing MAP Sensor

    Courtesy of GENERAL MOTORS CORP.
12. Remove the accelerator control cable bracket bolts (1).
13. Remove the accelerator control cable bracket (2) from the intake manifold.
    Fig 5: Removing Accelerator Control Cable Bracket Bolts & Bracket

    Courtesy of GENERAL MOTORS CORP.
14. 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.
       Fig 6: Removing EVAP Purge Solenoid Vent Tube

       Courtesy of GENERAL MOTORS CORP.
15. Remove the EVAP purge solenoid bolt (2), solenoid (3), and isolator (1) from the intake manifold.
    Fig 7: Removing EVAP Purge Solenoid Bolt, Solenoid & Isolator

    Courtesy of GENERAL MOTORS CORP.
16. Remove the intake manifold bolts.
17. Remove the intake manifold.
    Fig 8: Removing Intake Manifold

    Courtesy of GENERAL MOTORS CORP.
18. Remove the intake manifold gaskets (1) from the intake manifold.
19. Discard the old intake manifold gaskets.
20. Clean the gasket surfaces of the EGR pipe and the exhaust manifold, if equipped.
    Fig 9: Removing Intake Manifold Gaskets

    Courtesy of GENERAL MOTORS CORP.