I have a '15 6.2 Denali and I got the Morimoto Elite (35W 4500K) kit from TRS. It is designed to mount on the passenger's side and I found the space there to be extremely limited and IMO not the best location. I am working with TRS to get AMP extensions, and with a spliced in extra length to the power cord, I plan to mount all the components on the driver's side where the 2nd battery would go. One AMP extension harness will run from driver's side mounted ballast to the passenger side headlight. If it all works out I will post some pics.