Sounds like you worked at a dealership that likes to point fingers and do part swaps. Actual troubleshooting is a lost art.[...]
LOL
Sounds like you've got it all figured out!
Do you know with any degree of certainty that it's not the aftermarket remote start system? The vehicle exhibits unusual electrical gremlins, and installing that remote start system probably entailed hacking and splicing into the wiring harness at various points. It's a likely culprit, surely not the only one, but a likely one for sure.
If you can't concede that, then your prejudiced hatred of dealerships is blinding your ability to reason and, well that's a problem we won't fix on the internet. How is removing a faulty remote start system "parts swapping", or "pointing fingers"? I was simply stating my factual experience that when a vehicle had a remote starter installed, and had electronics issues, poor installation of the remote starter was often the cause of the problem. Hence my recommendation to look at that as a likely and probable cause. But thanks for your virtuous advice.
That being said, and having read the rest of the thread, it's also very likely that the vehicle was flood damaged in which case, I'd concur with others that the best course of action is to trade it in and start fresh.
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