Your cart is empty.
Your cart is empty.ReadyLIFT customers have asked for it and we have delivered. In fall of 2018 we announced our new leveling and SST lift kit offerings for the all-new GM 1500 trucks. We specifically did not include the factory lift kit-equipped GMC AT4 and Chevy Silverado Trail Boss. The AT4/Trail Boss are factory equipped with a 2" front lift. This front lift includes a longer front shock/strut assembly. When combining a traditional leveling kit on these factory lifted trucks, several issues present themselves including binding problems with the factory control arm ball joint and contact concerns with the lower strut/CV axle assembly. The ReadyLIFT 66-3921 1. 75" leveling kit is similar to our popular 66-3086 leveling kit for pre-2019 trucks. The 66-3921 leveling kit provides required amount of lift without causing conflict with the factory strut geometry and clearances. In light of the factory upper control arm's lack of dynamic range when the AT4/Trail Boss truck is further lifted, this leveling kit includes our popular tubular upper control arms with corrected ball joint cup angles, heavy-duty replaceable ball joints and out new Terrain Control Technology (TCT) maintenance-free pivot bushings with side-biter washers to improve alignment retention. Note: AT4 and Trail Boss do not fit the same size tire. This is due to the difference in front fender opening design. 66-3921 Leveling Kit: AT4 - Max tire 275/60-20, 20x9 0 offset wheel Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel
Amber Allen
Reviewed in the United States on January 4, 2025
Perfect for my 2024 GMC AT4. Got a great deal on Amazon when ready lift site was out of stock, was $120 cheaper than manufacture as well. Very satisfied!
Luis
Reviewed in the United States on January 19, 2025
Well made and perfect fit. The best leveling kit out in the market
Never arrived
Reviewed in Canada on April 16, 2025
The kit came complete, no missing parts. The upper control arm is quite beefy and keeps the factory dynamics . It gave my 2019 AT4 a better look and stance while keeping the original ride comfort.
Khalid Mohamad
Reviewed in the United States on August 24, 2024
This 1.75” readylift leveling kit fit my 2021 Silverado perfectly. All parts were accounted for and it installed with ease. I received it very quickly and it gave my truck a totally different look.
David
Reviewed in the United States on July 8, 2024
Leveled out the Trailboss perfectly.
Amanda Otto
Reviewed in the United States on November 26, 2024
Great solid lift, perfectly leveled my truck!
Steve S
Reviewed in the United States on August 27, 2022
Trail Boss factory 2” lift is good. But would be better if it was level. But GM gave it the standard rake. ReadyLifts leveling kit made specifically for the Trail Boss, set the front of my truck right where GM should have done it. I was a little concerned about it only being 1.75”. But it is perfect. And I don’t notice a difference in the ride. Still feels factory. Very happy with the outcome
Alexandre
Reviewed in Canada on July 16, 2022
Exactement se que je voulais. Bon kit, bonne qualiter, shipping rapide.
Pearl Cantu
Reviewed in the United States on November 9, 2022
I really like this leveling kit - took about 2-3 hours to install. Instructions we’re pretty straight forward. The control arm is definitely closer to tire (first pic is factory arm and second pic is ready lift) no rubbing…. But I am a bit concerned due to how close it is. You will need alignment after installing this kit! After alignment it drives really well! It even drives better than off the lot (after alignment)
brandon weer
Reviewed in the United States on December 9, 2020
A must for any Trail boss/AT4 owner. This kit lifts the front of the vehicle 1.5 inches and the vehicle sits completely level from front to back.On top of that, I was able to upgrade to a bigger tire. I’m now using a 305/60/20 with 20x9 inch wheels with a 0mm offset. Fitting 35s in the truck with very minimal fender trimming is a big win. As for the parts themselves, extremely quality and much more durable than the factory control arms. The ride quality is not jeopardized at all, in fact, it seems to make the steering lighter. The install was very easy, but I would recommend a partner to help!
Recommended Products
