Stock height vs leveling kit

[Carazus]

I have a 2016 Sierra and before ordering a leveling kit measured the center of wheel to top of fender I needed 2.5 spacer to be perfectly level. I had the motofab 2.5 installed and now 2 months later, my back end is an inch higher again. Can the suspension settle that much?

Ball joints are good, no noises, barely noticeable vibration

[no12nv]

i did the bds 3.5 lift. fronts still a 1in lower than rear , went to 20x10 rims w 35 nitto ridge grapplers.  lower bumper valance trim 1/4in to clear. love the ride n look /everything ... it sounds higher but its only 1in over level. so far id say been more than average agressive on it and drives rides nicer than stock all around. i actually wish i did 4 to 4.5 its not much per say but it would hv let me up to bigger tires. 1 inch mite sound like nm but on a truck it can change the whole look of everything.. yet just an inch..lol