I have a 2004 Dodge Ram 1500 and since October have had about 5 incidents where it doesnt want to start. During these events, the gear shift indicator lights up all gears, from "P" all the way across to "2"- making it appear as if i am in all gears at once.

I thought there was just a glitch, however yesterday it just refused to start. Even after allowing it to sit, it wont start. I had the battery checked and it is good, replaced the starter (which Auto Zone said was bad) and it still wont start. I rented a diagnostic kit from Auto Zone and it said there were not problems????

Apparently, it will only diagnose computer problems, not mechanical. Any ideas what could possibly be wrong with my truck??? Please help me.