Manifold Absolute Pressure Sensor Replacement 4.3L, 5.0L, 5.7L

Other than checking for a worn grommet and loose electrical connections, the only service possible is unit replacement, if the diagnosis shows the sensor to be faulty.

1. Disconnect the negative battery cable.

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.

2. Disconnect the vacuum harness assembly.
3. Disconnect the electrical connector releasing locking tab.



4. Remove the bolts or release lock tabs and remove the sensor.
5. Remove and discard MAP Sensor Grommet.

1. Install new MAP Sensor Grommet on the MAP Sensor.
2. Install the bolts or snap sensor on bracket.
3. Connect the electrical connector.
4. Connect the vacuum harness.
5. Connect the negative battery cable.

Manifold Absolute Pressure Sensor Replacement 7.4L

Other than checking for a worn grommet and loose electrical connections, the only service possible is unit replacement, if the diagnosis shows the sensor to be faulty.

1. Disconnect the negative battery cable.

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.

2. Disconnect the vacuum harness assembly.
3. Disconnect the electrical connector releasing locking tab.



4. Remove the bolts or release lock tabs and remove the sensor.

1. Install the bolts or snap sensor on bracket.
2. Connect the electrical connector.
3. Connect the vacuum harness.
4. Connect the negative battery cable.