Temp Sending Unit - from the front of the engine, look down with a flashlight just to the right of the Duretech cover. Make sure engine is cool. You should be able to squeeze your hand down in there to remove the electrical connector, and get in there with a box end wrench. When removing, keep in mind that coolant will leak out some so you must be quick to put the new one in so as not to make a mess. Also make sure to use some dielectric grease on the end of the connector.
NOTE: there are two versions of this unit. Sometime in 1998, they changed the connection end of this from a single blade to a double blade (pictured above). Make sure you get the right one.
