Best LED reverse lights

[2016YUKONSLT]

When looking on amazon for the 921 LED bulbs, it says they don't fit my vehicle. But 921 is the part number to replace them from the auto part store. Is it just because they are LED?

Side note: What headlights came with my vehicle? HID? LED? What about the foglights? I live in the country and I'd like brighter lights for night time.

 

[gmordie]

When looking on amazon for the 921 LED bulbs, it says they don't fit my vehicle. But 921 is the part number to replace them from the auto part store. Is it just because they are LED?

Side note: What headlights came with my vehicle? HID? LED? What about the foglights? I live in the country and I'd like brighter lights for night time.

This is the website I use to find out the bulb size it's way more accurate than Amazon https://www.osram-americas.com/en-us/applications/automotive-lighting-systems/Pages/lrgmain.aspx