Passenger upper taillight bulb does not flash.

[WyattTX]

I think I've figured it out. It appears the contact that makes the turn signal/flasher filament work in the socket got mishapen somehow. I am now on the hunt for a new socket. All I can find on the internet is license plate bulb sockets, and LED conversion sockets. I'm hoping I can find 2014-2019 wreck, I can cut a socket out of and splice into my harness. I'd rather not have to pay GM for a new rear light harnesses, when the rest of mine is fine. Thanks for the advice everyone.