So i decided to try somthing. My obd2 dosent work so i took a ecm from a 97 tahoe and put it in my 97 pick up. Now realistically it shouldn't work cause its not flashed for my truck. But it works in the truck even better then the one originally in it. Im still having no luck on the obd2 connecting. How hard is it to replace the obd2 harness. Thank yall