decoupler pulley

[87zjeff]

Hi all, been lurking for a bit and find i can't find much info on a question i have. 2015 Yukon Denali 6.2 alternator from what i can find has the decoupler pulley. doesn't look like the standard pulley at least. looking at replacement options and can't seem to find much. any factory 220 amp models seem to have the basic pulley and aftermarket ones such as the Mechman models have basic pulley. most info says not to put a standard pulley in place of the decoupler model.

Thoughts and suggestions on this? maybe i'm way overthinking this?

 

[Walkerfever]

I installed the 84143541 220a alternator from a 6.6L and it works fine. I appears to have the decoupling pulley on it:
Remember to upgrade your charge wire and change the Megafuse out to a 250a.