install door harness for mirrors

[Drew53]

I installed the big camper mirrors on my 2015 Chevy Silverado LT and  found out to make the lights and  signals to work in need to install the door harness 8412556 and 84125573. Do you know where I can get the installation instructions or take my truck and have them installed?

[Tahoe02]

Have you checked with pgamboa who installs all the upgraded parts. He builds and sells harnesses for the upgrades and helps all the members on this board.