GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Grand Prix 🢒 Engine 🢒 Engine Controls - 3.1L 🢒 Mass Airflow Sensor Replacement

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in engine electrical.

    2. Object Number: 49905 Size: SH
  2. Disconnect the IAT sensor electrical connector.
  3. Disconnect the MAF sensor electrical connector.
  4. Remove the air inlet duct from the MAF sensor and the throttle body.
  5. Remove the MAF sensor (1) from air filter housing.

Installation Procedure

    Object Number: 49905 Size: SH
  1. Carefully install MAF sensor (1) to air inlet grommet.
  2. Attach the MAF sensor to air inlet duct and install the air inlet duct.
  3. Connect the MAF sensor electrical connector.
  4. Connect the IAT sensor electrical connector.
  5. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in engine electrical.