GM Service Manual Online
For 1990-2009 cars only

Intake Manifold Disassemble LY7/LP1

Upper to Lower Intake Manifold Disassemble Procedure


    Object Number: 1888137  Size: SH

    Important: Do not reuse the upper-to-lower intake manifold gasket and the intake manifold-to-cylinder head sealing gaskets.

  1. Remove the upper-to-lower intake manifold bolts.

  2. Object Number: 1318829  Size: SH
  3. Remove the fuel injector wiring harness bracket bolt from the upper intake manifold.

  4. Object Number: 1888141  Size: SH
  5. Remove the upper intake manifold from the lower intake manifold.

  6. Object Number: 1888145  Size: SH
  7. Remove and discard the upper-to-lower intake manifold gaskets.

Upper Intake Manifold Disassemble Procedure


    Object Number: 1888148  Size: SH
  1. Remove the throttle body bolts.
  2. Remove the throttle body.
  3. Remove and discard the throttle body gasket.

  4. Object Number: 1888150  Size: SH
  5. Remove the barometric pressure (BARO) sensor bolt.
  6. Remove the BARO sensor.

  7. Object Number: 1888151  Size: SH
  8. Remove the communicator valve bolts.
  9. Remove the communicator valve.

  10. Object Number: 1888153  Size: SH
  11. Remove the sight shield ball studs.

  12. Object Number: 1888154  Size: SH
  13. Remove the sight shield grommet.

Lower Intake Manifold Disassemble Procedure


    Object Number: 1211088  Size: SH
  1. Remove the fuel injector wiring harness.

  2. Object Number: 1211091  Size: SH
  3. Remove the fuel injector rail bolts.
  4. Remove the fuel injector rail.

Intake Manifold Disassemble LLT


    Object Number: 1977998  Size: SH
  1. Remove the throttle body bolts.
  2. Remove the throttle body.
  3. Remove and discard the throttle body gasket.

  4. Object Number: 1977999  Size: SH
  5. Remove the intake manifold cover bolts.
  6. Remove the intake manifold cover.

  7. Object Number: 1978000  Size: SH
  8. Remove and discard the intake manifold cover gaskets.