OK folks, I'm new to all this so bear with me...
Took my G8 in to have inspection done last week, they complained that O2 heater and EVAP weren't showing readiness codes because I'd recently flashed it while working on my transmission tune. I waited a week, flashed a "DTC all ready" tune into it, car started and ran fine. Drove it to inspection, passed, they mentioned something about the battery looking low which puzzled me because engineering mode showed 68% charge and voltages looked correct.
So I start it, drive a while to make sure battery has a good charge, and I stop to flash in the new tune I wanted to do. It flashes in with no errors, so all looks normal procedure until I turn the key off and then back on to start the car. Oh boy, it won't start, it will barely even turn over, and the BCM is acting like it's freaking out because the radio wants to come on when it shouldn't etc.
So I figure maybe it needs to sit for a while with the negative battery terminal unplugged. Which is what it's doing at the moment. Any ideas where I may have gone wrong and screwed up? I know y'all probably see dumb posts like this all the time but any help is appreciated.