Yeah, it stinks you can't adjust them on the vehicle. Did you ever find a spanner wrench that would work for them?Same here. When i put them on my wifes ‘16 denali, pretty sure they gained that much or even a bit more. Had to take them back out and adjust them way down.
When I was running the Fox 2.0 (0-2" adjustable coil overs), my front end ride height increased about +2.75 inches, using the pre-set +2 inches out-of-the-box as Fox states.
Very similar ride height increases as @15TahoeLT mentioned in post #5 of this thread.
How did you know the ball joints on the UCAs were wearing out?