GM Service Manual Online
For 1990-2009 cars only

Manifold Absolute Pressure Sensor Replacement VIN 1

Removal Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

  2. Object Number: 12345  Size: SH
  3. Remove the screws.
  4. Disconnect the MAP sensor electrical connector and vacuum hose from the sensor.
  5. Remove the MAP sensor.

Installation Procedure


    Object Number: 12345  Size: SH
  1. Connect the electrical connector and vacuum hose to the MAP sensor.
  2. Position the MAP sensor to the bracket and secure with the screws.
  3. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

Manifold Absolute Pressure Sensor Replacement VIN K

On VIN K applications, the MAP sensor is mounted to the PCV valve cover.

Removal Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Disconnect the MAP sensor electrical connector.

  3. Object Number: 12346  Size: SH
  4. Carefully bend 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 electrical connector.
  4. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.