I have several light upgrades on my 2006. LEDs in the fog lights that were plug and play. That alone made a huge difference. I also have after market headlight housings and I’m running LEDs in both low and high beam. The housings have an ok projector lense for low and then standard reflector setup for high beam. I got the bulbs on amazon I believe. Tou could pick something like those up and run them in your OEM Denali housings. Trying to remember the brands, I think
@Tonyrodz might have the same LEDs I’m running on his Tahoe?! Anyways, it’s not custom retrofit quality lighting output but a huge upgrade over stock and I quite like the setup. I’ll link the page and post in my build with the lighting setup.
Edit:here the link:
https://www.tahoeyukonforum.com/threads/chases-2006-xl-denali-build.84562/page-172
check out page 172, all the photos from last summer when I did the current headlight housing setup. I think there may be some night time output shots in the next few pages as well