GM Service Manual Online
For 1990-2009 cars only

Manifold Absolute Pressure Sensor Replacement L26

On the L26, the manifold absolute pressure (MAP) sensor is mounted to the positive crankcase ventilation (PCV) valve cover.

Removal Procedure

  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  2. Disconnect the MAP sensor electrical connector.

  3. Object Number: 12346  Size: SH
  4. Carefully release the locking tabs holding the MAP (1) sensor to the PCV valve cover (2) just enough to remove the MAP sensor.
  5. Pull the MAP sensor straight out of PCV valve cover.

Installation Procedure


    Object Number: 12346  Size: SH
  1. Ensure that the seal is installed on the MAP sensor and that the seal is not damaged.
  2. Position and install the MAP sensor (1) to the PCV valve cover (2). Ensure that the locking tabs engage to hold the MAP sensor to the PCV valve cover.
  3. Connect the MAP sensor electrical connector.
  4. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .

Manifold Absolute Pressure Sensor Replacement L32

Removal Procedure


    Object Number: 1210599  Size: SH
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  2. Disconnect the MAP sensor electrical connector and the vacuum hose.
  3. Remove the manifold absolute pressure (MAP) sensor retainer.
  4. Remove the MAP sensor.

Installation Procedure


    Object Number: 1210599  Size: SH
  1. Install the MAP sensor.
  2. Install the MAP sensor retainer.
  3. Connect the MAP sensor electrical connector and the vacuum hose.
  4. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .