Update....
Just picked up my truck this morning from the dealership. First I was told that a module was ordered, but then they started that they received notification of a software update that fixes the P25A2 error code.
Work order states that the bulletin (PIT5728B) covering the issue was found (not released yet) so they got with GM and performed the update prior to release.
Hope this fixes the issue. I'll give an update after a while.
P.S. - When I got home my truck told me there was a software update on the in dash screen. I clicked update. Not sure what the update was about.
I know the trucks are new and we expect things to work, but at least GM has the ability to update the computer system where as years ago, they didn't. (Yes, things worked back then because of no computers........) Times change, but at least GM is taking care of people. It's technology and sometimes there are hiccups. Look at your smartphone, how many updates has it had. Just saying....