Hello guys! I'm having issues with my 97 Expy 5.4L. About 3 months ago I started to get in the vehicle and the theft light would prevent me from starting it. I would take the key out and re-insert it and theft light would go out and it would start right up. Within a week it seemed to have died on me completely. I took the leads off the battery and put them together to try to drain all electricity form capacitors and that did the trick. Since then I added aftermarket key (since I only had one) and it programmed by a auto lock specialist just fine. Yesterday I drove it one mile to the store and when I went to get back into it, it did not start. Theft light flashes just like before... What could I test and how could I test it? I was thinking about getting the PATS transponder behind the steering wheel form pick n pull to swap it. What are your thoughts? Brief History: PCM replaced about a year ago with a used one due to rain damage from leaky windshield. Got windshield fixed and I'm pretty sure the used PCM I installed had water damage on it as well (rust was on the back of it... After I replaced it, truck started up just fine though.