I have 2 2017 Silverado with the 8 screen (no bose) stock. I purchased the lc7i to replace all the door speakers and add subs. I have everything hooked up ...

I have 2 2017 Silverado with the 8" screen (no bose) stock. I purchased the lc7i to replace all the door speakers and add subs. I have everything hooked up but can't find which color wire to tap into to send the remote signal to turn on all the amps and will keep them on when you shut off the truck until you open drivers door when the radio turns off. Just need to know which harness and color wire it is behind the deck or is it by the driver's floorboard.