GM Service Manual Online
For 1990-2009 cars only

Manifold Absolute Pressure Sensor Replacement VIN K

On VIN K applications, the manifold absolute pressure (MAP) sensor is mounted on the PCV valve cover.

Removal Procedure

  1. Turn OFF the ignition.

  2. Object Number: 49594  Size: SH
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.

  4. Object Number: 378514  Size: SH
  5. Disconnect the electrical connector (2) from the MAP sensor (1).
  6. Carefully bend the locking tabs retaining the MAP sensor (1) to the PCV valve cover (3) enough to remove the MAP sensor. Pull the sensor straight out of the PCV valve cover.

Installation Procedure


    Object Number: 378514  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 (3). Ensure that the locking tabs engage to hold the MAP sensor to the PCV valve cover.
  3. Connect the MAP sensor electrical connector to the MAP sensor (1).

  4. Object Number: 49594  Size: SH
  5. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.

Manifold Absolute Pressure Sensor Replacement VIN 1

Removal Procedure

  1. Turn OFF the ignition.

  2. Object Number: 203882  Size: SH
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.

  4. Object Number: 378422  Size: SH
  5. Remove the 2 bolts (1) from the manifold absolute pressure (MAP) sensor (2).
  6. Disconnect the electrical connector (3) from the MAP sensor (2).
  7. Disconnect the vacuum hose (4) from the MAP sensor.
  8. Remove the MAP sensor from the engine.

Installation Procedure


    Object Number: 378422  Size: SH
  1. Connect the electrical connector (3) to the MAP sensor (2).
  2. Connect the vacuum hose (4) to the MAP sensor.
  3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Position the MAP sensor to the bracket and secure the sensor with the bolts (1).
  5. Tighten
    Tighten the bolts to 3 N·m (27 lb in)


    Object Number: 203882  Size: SH
  6. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.