I received my 6112s (47-273702) last week and tried to install them this last Saturday; unfortunately they didn't fit. The 6112 shaft was too thick and didn't fit through the OE top mount/top hat. I reached out to Bilstein and confirmed that I received the correct shocks.
In all honesty, I know most websites state shocks will not fit the Denali model with magnetic suspension, but I figured it's because they don't want to take responsibility for the dash alarms going off when the magneride suspension is disconnected. I've seen others on this forum replace the magneride with Halo shocks and other brands, so I didn't think it would be an issue. In this case, the 6112s did not fit my OE mounts.
There wasn't much information regarding fitment of the 6112s to the Denali model and the Battle Born Offroad website shows they will fit the Denali model. I tried reaching out to them yesterday, but was unable to reach them (probably due to the holiday on Sunday). I sent a email to them with the same information and I'm waiting to hear back...