Jason workman

I'm trying to put led accent lights in the foot wells of my truck. I saw a video on YouTube on how to do it. I tried to find the wiring diagram for the bcm for my year of truck, 2019 chevy silverado, but I can't find one anywhere. I want to tap into the wire for my dash light dimmer, so that way the lights will come on when I unlock the truck and when my dash lights come on. But im not sure which wire to tap into. Could someone please help me figure this out.