Thought I would add my recent experience...just upgraded to a 2016 Denali XL on Black Friday from my 2015 Suburban...I installed a HID low beam kit, Philips LED reverse and license plate bulbs in the Suburban and loved them! Very bright and pure white color...
However, as bright as the Philips LEDs were vs the stock halogens they didn't 'project' the light rearward much and created a very 'fuzzy' backup camera image....so I wanted to try something different in the Denali....and ran across these mentioned on the forum and COULD NOT BE HAPPIER!!!
iJDMTOY Extremely Bright 5-CREE 25W High Power 912 921 920 T10/T15 LED Bulbs For Car Backup Reverse Lights, Xenon White https://www.amazon.com/dp/B00CORBQUA/ref=cm_sw_r_cp_api_aEDtyb69B8VGK
These are just as bright as the Philips BUT they have a focused beam directly rearward and provide a MUCH better light for backing in the dark AND the camera image is AMAZING compared to the stock halogen bulbs or the Philips bulbs at night!! SOOOO glad I tried these!! I'll try to get you some night pictures and pics of the backup camera image soon!
Those led are almost like one im talking about. These SBL have 10 SMD, 350 lumens and 2yr warranty but they cost double iJDMTOY leds