2016 Chev Colorado towing questions

I have a 2016 set up to tow. I am using M&G for the brakes and I use separate bulbs for rear lights. I have seen several vehicles in my shop using diodes for the tail lights and they cause problems. I am sure some people on these forums will say they have never had problems but when we sell these systems we will not tap into the factory lights. We disconnect the wires going to the key switch to disable the power with a toggle switch. My 2010 was much easier to tow.