03-04 Trucks will typically have the bellcrank assembly and sensors that works for those running the old school automatics (904,998,999,500,42R,727,518,& 46R).  Some can be hard to find, but Mercedes vehicles also have a very similar assembly and sensor that would work with the G3 Hemi PCM.  Check out our list here for the models that most likely uses that sensor and go to the Junkyard and get you one! Also check out our Youtube video on this exact topic on how to find the right vehicle and get the bellcrank removed.