GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Other than checking for a worn grommet and loose electrical connectors, the only service possible is a unit replacement if the diagnosis shows a malfunctioning MAP sensor.

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.

  3. Object Number: 12817  Size: SH
  4. Disconnect the MAP sensor harness connector.

  5. Object Number: 10933  Size: SH

    Notice: Do not rotate or pry on the MAP sensor when removing. Damage to the MAP sensor or the intake manifold may result.

    Important: After removing the MAP sensor from the intake manifold, replace the MAP sensor to intake manifold grommet.

  6. Remove the MAP sensor.
  7. Remove the MAP sensor grommet.
  8. Discard the MAP sensor grommet.

Installation Procedure

  1. Install the new MAP sensor grommet on the MAP sensor.

  2. Object Number: 10933  Size: SH
  3. Install the MAP sensor.

  4. Object Number: 12817  Size: SH
  5. Connect the MAP sensor harness connector.
  6. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.
  7. Connect the negative battery cable.