The two guages and the transmission not shifting by itself both stopped working at same time. I bought a new transmission three years ago never had any problems with it. I took truck into a good place to have it checked and was told its not the transmission but probably something to do with something in the electronics. He hooked up a computer to my truck just to see if it was reading a rpm signal. It did. It just was not reaching my my rpm gauge. So somehow the 2 gauges not working and the auto transmission not shifting are somehow connected somewhere I guess. I can still drive the truck but I have to manually shift from second to third to start or I just leave it in third. First gear and Drive don't work right now either. My wife was driving one time and she said the gauges all of a sudden started working for just a min and the truck auto shifted fine before it went back to not working. Does anyone know what is causing this? I've heard it could be the computer itself or something called a vulcan module ( i think that what it was called). Any ideas and if it is that module is it a fairly cheap item and where is it located? My truck is a 1995 gmc sierra 350 5.7L 4x4 1500 Also I broke the door handle. where can I buy or do I have to go to dealer?