Hummer 12711681 Sensor Assembly, Map

You can Select Your Vehicle to check if 12711681 fits your vehicle.

First, to remove the MAP sensor on V6 models, disconnect the electrical connector and pull the sensor from the intake manifold. Next, replace the sealing grommet if necessary, and use oil on the grommet during installation. For a V8 model, remove the intake manifold cover, disconnect the electrical connector, and remove the sensor.

The Manifold Absolute Pressure (MAP) sensor checks for any variations in the intake manifold pressure due to the change of engine load and speed and translates this information into voltage output. The PCM reads this as a changing voltage signal from closed throttle (high vacuum) to wide open throttle (low vacuum). The PCM uses the MAP sensor to regulate fuel injection and ignition timing. On six-cylinder models, unplug MAP electrical connector. Unplug the MAP sensor electrical connector then squeeze its retainer tabs, remove its retainer, then pull it straight out of the manifold. Squeeze the sensor retainer inward, pull straight up and remove it. On V8 models, detach MAP electrical connector. Remove retaining clips and withdraw MAP sensor from upper intake manifold. Detach clips, remove MAP sensor from upper intake manifold. Replace upper intake manifold MAP sensor seal. Installation is like removal but reversed.

To remove the 2.4L MAP sensor, begin by removing the engine cover and disconnecting the air cleaner outlet duct from the throttle body. Disconnect the connector from the sensor and unscrew the mounting bolt and the sensor.

If the sealing grommet is damaged, it should be inspected and replaced if necessary. Additionally, during installation, it is recommended to use clean engine oil on the grommet to prevent tearing.

The MAP sensor can be disconnected by unplugging the electrical connector, squeezing the retainer tabs and removing the retainer, then pulling the sensor straight up and out of the manifold.

The MAP sensor is located on the right side of the intake manifold.

Remove the engine cover and disconnect the electrical connector from the sensor located on top of the intake manifold. Then, remove the sensor mounting bolt and pull the sensor from the manifold.

To remove the MAP sensor on a V6 model, you need to disconnect the electrical connector and then pull the sensor straight up out of the intake manifold.

The general process for installing the MAP sensor on both models is the reverse of the removal process.

The MAP sensor monitors the intake manifold pressure changes resulting from changes in engine load and speed.

If the sealing grommet is damaged on a V8 model, it should be inspected and replaced if necessary. During installation, it is important to use clean engine oil on the grommet to ensure proper sealing. Additionally, make sure the retainer snaps into place during installation.