Long time getting around to this, but my stock tires are due to be replaced soon so thought I'd install some spacers so I could keep my stock LTZ Wheels. 5-10k more miles and I'll be putting on my 305/55R20 Mud tires from my 2014 Silverado. Photos really don't due justice to the difference in the look, but you can see how close I was to my uca's prior to the spacers, max was about 1/4".
2019 LTZ/Z71 Silverado w/35k miles
6.2L with the Chevrolet Performance Intake & Exhaust installed from factory
Readylift 4" SST Lift
Stock LTZ Wheels w/ stock 275/60R20's
Supreme Suspensions 1.5" hub centric spacers
I just installed the SST kit on my 2019. Took the whole weekend, but got it done in my driveway. Next will be tires and maybe wheels, just waiting for my stock ones to wear out, only 14k miles on em.
This is my 2019 Z71, LTZ, 6.2L with GM performance upgrade.