Gmcbucky

Sam, i messaged you earlier, but will try again.  i have a 2019 RST. I installed the towing mirrors and the harnesses.  i took the truck to the local dealer and they said that gm wouldn't flash the BCM because the mirrors aren't supported for the 2019 model year. I'm interested in how you wired yours in to make the lights work.  I would appreciate it if you could get back to me.

Thanks,

Carl

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