For reference it's a 2015.5 with the 8 speed, 6.2 4wd. I did the transmission tune as well. But I pretty much keep the stock tuning since our transmissions are, well, you know.
Old thread but I thought I would chime in. I went with the AFE intake and Black Bear tune. It is a very noticeable upgrade and worth it. I bought new and am at 140K miles.
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