So the question is:
Will the Tahoe PPV Deflector Part # 23365760 fit a Yukon/Yukon XL?
For that we'll need to compare the stock Tahoe/Suburban deflector overall length/curvature/and mounting points to the one on the Yukon.
Unfortunately the diagram pictures below are vague, especially the one I found for the Tahoe.
I do see a definitive way to figure this out.
If anyone is willing to pay shipping, I will donate to you my stock deflector, so someone can test it out.
If my stock deflector works on your Yukon then the Tahoe PPV will as well.
Another less costly option, would be for you to trim the stock piece like some other people here have done in the past on various gen of trucks.
Stock Tahoe/Suburban Deflector is GM Part# 22936501
Stock Yukon / Yukon XL Deflector is GM Part# 22936430