GM Service Manual Online
For 1990-2009 cars only

    Object Number: 815393  Size: SH
  1. Remove the intake plenum turning valve bolts.
  2. Remove the intake plenum turning solenoid bolts.
  3. Remove the intake plenum turning valve, intake plenum tuning solenoid and O-ring.

  4. Object Number: 815395  Size: SH
  5. Remove the vacuum brake booster fitting from the intake plenum.