The CHT sensor is situated on the 3.5 L and 4.2L V6 engine left cylinder head rear end; it is better accessed underneath due to the close proximity. First, remove the cable from the negative battery terminal and proceed to lifting the front part of the vehicle using jack stands. To remove the old CHT sensor, you have to unplug the electrical connector from the CHT sensor, then unscrew it with the help of a wrench or socket and then remove it. Installation is the complete opposite of removal where the sensor is tight to the recommended torque. For 4.6L and 5.4L V8 models, CHT sensor is mounted on the inner side of the right cylinder head, so one has to remove the intake manifold to get at the sensor. Disconnect the negative battery terminal, and for the 2-valve 4.6L engines only, also remove the alternator and intake manifold, relieve the fuel system pressure. Pulling the tab, there are actually two connectors, unplug the electrical connector, and then, using a wrench or deep socket, loosen the screws and take out the CHT sensor. Reinstallation is done in an opposite manner and always with the right amount of torque. In 3.7L V6, 5.0 L and 6.2L V8 models, CHT sensor is fitted either under the lower intake manifold gasket, lower intake manifold or the intake manifold. Rub the earth lead off the battery, take out the intake manifold, and remove the electrical connector of the CHT sensor. The removal of the sensor requires a wrench or deep socket in addition to the correct tightness on the reinstallation.