SKU: 21114668264

1.75 Inch Leveling Kit 2019-2025 Silverado/Sierra AT4 And Trail Boss ReadyLIFT

Sale price$238.48 Regular price$264.98
Save 10%

Pay in installments of $66.25 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 30 - Sep 4

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

1.75 Inch Leveling Kit 2019-2025 Silverado/Sierra AT4 And Trail Boss ReadyLIFTReadyLIFT 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 Inch front lift. This front lift includes a longer front shock strut assembly. When combining a traditional leveling kit on these factory

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-Inch 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-Inch 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. Note: Not compatible with Sierra AT4X or Silverado ZR2 Edition.

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

Features and Benefits:

  • 1.75-Inch front leveling lift
  • Compatible with 2019-2023 GM at4 and Trail Boss models
  • Not compatible with Sierra AT4X or Silverado ZR2 Edition
  • Includes DOM tube steel upper control arms
  • TCT maintenance-free pivot bushings
  • 1-ton ball joints
  • CNC machined aircraftgrade billet Aluminum top and bottom strut spacers
  • AT4 Max tire size: 275/6020
  • AT4 Max wheel size: 20x9 with 0 offset
  • Trail Boss Max tire size: 295/6520
  • Trail Boss Max wheel size: 20x9 with 0 offset
  • At4 at4 Max tire size: 275/6020
  • At4 at4 Max wheel size: 20x9 with 0 offset

Details:

  • Fitment: Direct Fitment
  • Front Lift Component: Spacer
  • Front Lift Height: 1.75 Inch
  • Front or Rear: Front
  • Install Difficulty: Difficult Requires Professional Installation
  • Installation Time: 4 Hours
  • Lift Height: 1.75 Inch
  • Max Tire Size: 295
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 21114668264

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.7 ★★★★★
Based on 28 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
L
Verified Purchase
Lowknifedge
Waukegan, US
★★★★★ 5
Great wallet
Color: Steven Medium Brown, Size: One Size
Great and very durable wallet. They are slim, fit well in a pocket, and are thin, unless you have lots of CC and money in it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 13, 2025
L
Verified Purchase
Lori Dawkins
Draper, US
★★★★★ 5
Good quality and gift
Color: Derrick Brown, Size: One Size
Good quality and perfect gift
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 18, 2026
T
Verified Purchase
Tera
Lowell, US
★★★★★ 5
Slim and elegant, beautiful leather
Color: Derrick Brown, Size: One Size
I bought this wallet for my son for his 36th birthday. I love that it is a true Fossil wallet and all that goes with anything that is a Fossil product. Style, masculine elegance, beautiful soft grain leather, and the Fossil logo embedded on the front, right bottom of the billfold. It came in different colors but I chose the soft brown one. This is also very sleek, has plenty of compartments for ID, cash, credit and business cards, and it is RFID blocked. I didn't realize when I purchased this that it is to be worn in the front pocket of the pant. It is a fashion made for men who don't appreciate a wallet in the back. It can be very uncomfortable and someone can easily lift the wallet out of the back pocket...So Fossil is producing this item to wear in the front for easy access and protection. It is small but no less accommodating. I showed it to one of my other son's and he wished I'd get one for him, and he is very fashion-forward, but practical. So I'm very pleased with my purchase although I haven't heard from the birthday boy yet! Also it came in the usual Fossil tin box that all their products are housed in-original with a bit of funk, perfect for any aged man.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2019
P
Verified Purchase
Presence Protection & Security Investigations, LLC
Louisville, US
★★★★★ 5
Perfect G Shock for my use
Perfect G Shock King Red I have read many reviews on this Robust G shock. Im a night time duty officer. The red face and big black resin is great. The reddish pink light is actually low key. When im out in the sun I have no issue in looking at the time date etc. Besides everything else about the king red. Yes the stands out and obvious. Im more than satisfied.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
A
Verified Purchase
Amazon Customer
Waukegan, US
★★★★★ 5
Great watch
Awesome colorway, looks great on the wrist very fitting for a big guy. Same G-Shock quality, no complaints and gotten plenty of compliments.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026

recommand products