I don't think I can help you much here JimAndAnnie. My rig is an '07 with the diesel. My only way to get the rig going was to remove the starter and then chip off the epoxy and remove their module that's on the starter.
I was assuming that my problems were due to the diesel engine and it's electronics. Seeing as how you have the gasser, I don't know what's wrong. I've had their system on several other rigs with no problems. My hassles also started with their new wireless system. The old one had a wire running from the the dash unit to the starter. It was a bit of a pain to run the wire, but really only took about 15 minutes. The new wireless setup is a snap to install, but if it doesn't work, it's worthless. I am assuming that their units work for most non SMB rigs?? Can't imagine that they could stay in business otherwise.
I've been talking with Jesse (PowerLock's main troubleshooter 800-966-9578) and he is at a loss as to what's wrong.
So, as I said, I don't know what to say. I still think it's the best system on the market as far as theft proof, but if we can't start our own rigs.... I've had to pull the starter in three different countries, mountains, deserts, parking lots, middle of nowhere and once at 10 degrees lying in snow. I gave up on it.
I still call Jesse, and if they come up with a cause and it's cure, I'll install another on.
So, good luck.