Oh my, so many mythconceptions. Problem with fob was that key was not coming out. Bought a pair of new cases to play with. Used the snap ring pliers to open one of the spares to learn how. Took original and used snap ring piers to pop the key end, some debris fell out. Now key snaps out properly so just popped original back together. Key starts and runs car. Is transmitting on 300-320Mhz, can read chip (found my reader). So fob is original and intact and works (or not) as originally described.
Bottom line it starts and runs great but have no way to lock car from outside.
Aftermarket radio to Crossfire wiring adapter should be here Monday and when remove to install Android Auto radio with 7" scream will run some tests on the console lock switch.
However have found no mention of one that act like mine. I suspect the SKREEM may not even be there.