pnw_obrigade

Well to be fair the average Joe who just drives their truck on glass roads the Ranchos are probably enough and aren't "bad" but they are far from great though. They have terrible rebound characteristics and the back end chatters over larger bumps vs a smooth rebound transition. This is heavily noticed on older highway with consistent concrete seams or typical FS roads that are wash-boarded. Although, a 2in shock body the internal valve stack is much smaller diameter compared to other more comparable 2.0 shocks like Bilstein or Fox. Ultimately, the build quality of Rancho is cheap and budget at best. Good example, I hit a broken section of highway at 70mph on cruise control and the backend was so unstable the a$$ end skittered sideways in the rain some. This is a brand new 23 AT4 with 1,000 miles on it, far from acceptable suspension performance on a $70k truck. The Bilsteins aren't some holy grail but for their price point there isn't much better. Frankly, I'd rather have at minimum 6112, Fox 2.5's, or even Kings but all those are on 6 month+ backorders so these are about the best that's available right now to get rid of these junk shocks.

Has anybody used the Motofab AT4 1.5" preload spacer on 5100's to get more lift than 1.1" on the 3.0 Duramax (assuming the Bilsteins are set in the stock position)?

So adding to the number of which one works best questions. I have a 2023 AT4 with Bose, I assume 19417164 is correct but GM accessories site says no?

Setup looks great! Did you ever find a way to do the speedometer calibration for the newer 22+ refresh? I seen that Pulsar might be coming out with their updated LT module at some point for this.