Intake Manifold Removal

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

DO NOT use the intake manifold-to-cylinder head gaskets again.

1. Remove the manifold absolute pressure (MAP) sensor, if required.
   Fig 1: Removing Manifold Absolute Pressure (MAP) Sensor

   Courtesy of GENERAL MOTORS CORP.
2. Disconnect the knock sensor wire harness connector (1) from the fuel rail stop bracket (2).
   Fig 2: Disconnecting Knock Sensor Wire Harness Connector

   Courtesy of GENERAL MOTORS CORP.
3. Remove the positive crankcase ventilation (PCV) valve pipe from the left rocker cover - LS1.
   Fig 3: Removing Positive Crankcase Ventilation Valve Pipe From Left Rocker Cover

   Courtesy of GENERAL MOTORS CORP.
4. Remove the PCV valve pipe strap nut - LS1.
5. Remove the PCV valve pipe from the right rocker cover and intake manifold - LS1.
   Fig 4: Removing PCV Valve Pipe From Right Rocker Cover And Intake Manifold

   Courtesy of GENERAL MOTORS CORP.
6. Remove the PCV valve pipe (1) from the valley cover and intake manifold - LS6.
   Fig 5: Removing PCV Valve Pipe From The Valley Cover

   Courtesy of GENERAL MOTORS CORP.
   CAUTION: Refer to FUEL RAIL STOP BRACKET INSTALLATION CAUTION .
7. Remove the fuel rail bolts.

   Remove the intake manifold bolts (1) and fuel rail stop bracket (2).

   Fig 6: Removing Intake Manifold Bolts & Fuel Rail Stop Bracket

   Courtesy of GENERAL MOTORS CORP.
8. Note the location of the fuel rail ground strap (1) on the intake manifold.

   The fuel rail ground strap must be installed during assembly.

   Fig 7: Locating Fuel Rail Ground Strap

   Courtesy of GENERAL MOTORS CORP.
9. Remove the engine coolant air bleed pipe hose from the throttle body.
10. Remove the intake manifold.
    Fig 8: Removing Intake Manifold

    Courtesy of GENERAL MOTORS CORP.
11. Remove the manifold-to-cylinder head gaskets (1) from the intake manifold.
12. Discard the intake manifold gaskets.
    Fig 9: Removing Intake Manifold Gaskets

    Courtesy of GENERAL MOTORS CORP.