GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 CTS 🢒 Engine 🢒 Engine Mechanical - 5.7L 🢒 Intake Manifold Removal

    Object Number: 58838 Size: SH

    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.

    2. Object Number: 1272785 Size: SH
  2. Disconnect the knock sensor wire harness connector (1) from the fuel rail stop bracket (712).

    3. Object Number: 1272790 Size: SH
  3. Remove the positive crankcase ventilation (PCV) pipe - dirty air (716) from the valley cover and intake manifold.

    4. Caution: Refer to Fuel Rail Stop Bracket Installation Caution in the Preface section.


    Object Number: 1272793 Size: SH
  4. Remove the intake manifold bolts (713) and fuel rail stop bracket (712).

    5. Object Number: 1272783 Size: MH
  5. Note the location of the fuel rail ground strap (550) on the intake manifold.

    6. The fuel rail ground strap must be installed during assembly.


    Object Number: 639836 Size: SH
  6. Remove the engine coolant air bleed pipe hose from the throttle body.
  7. Remove the intake manifold.

    8. Object Number: 1272799 Size: SH
  8. Remove the manifold-to-cylinder head gaskets (514) from the intake manifold.
  9. Discard the intake manifold gaskets.