GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1623766  Size: SH
  1. Remove the throttle body. Refer to Throttle Body Assembly Replacement .
  2. Disconnect the evaporative emission (EVAP) purge tube from the intake manifold. Refer to Plastic Collar Quick Connect Fitting Service .
  3. Disconnect the wiring harness clips from the fuel rail and reposition the harness out of the way.

  4. Object Number: 1581050  Size: SH
  5. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
  6. Remove the MAP sensor.
  7. Important: If the MAP sensor seal is damaged, the MAP sensor must be replaced.

  8. Inspect the seal for damage.

Installation Procedure


    Object Number: 1581050  Size: SH
  1. Install the NEW MAP sensor seal, if required.
  2. Install the MAP sensor.
  3. Connect the MAP sensor electrical connector.

  4. Object Number: 1623766  Size: SH
  5. Position the wiring harness and connect the harness clips to the fuel rail.
  6. Connect the EVAP purge tube to the intake manifold. Refer to Plastic Collar Quick Connect Fitting Service .
  7. Install the throttle body. Refer to Throttle Body Assembly Replacement .