Just did an LED swap on my 2015 Silverado 2500 LTZ. I wanted something that was plug and play and didn't need any modification to the housing or caps.
Tried Putco XM-L2 kits for the H11 and 9005, but they did not fit in the caps. Ended up going with Putco Nite-Lux instead which just fit. I spaced the heat sink ribbons out as best I could, but it's pretty tight clearance. I guess time will tell if the cool properly. Everything was 100% plug and play, and there was enough room inside the housings to mount the small ballasts that are part of the Nite-Lux kit. The fogs were Putco Optic 360 and fit perfect.
So far pretty happy with everything. Color temp was 6000K on all bulbs so it's a bit on the blue side, but matched well between the Nite-Lux and Optic 360 bulbs.. I'd have preferred more white, but overall light output seems better, so can't complain. Putco advertises 2500 lumens for the Nite-Lux kits