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.

Features

• 1.75" front leveling lift
• Compatible with 2019-2025 GM AT4 and Trail Boss models
• Not compatible with Sierra AT4X or Silverado ZR2 Edition
• Includes DOM tube steel upper control arms
• TCT maintenancefree pivot bushings
• 1ton 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 off-set
• Trail Boss Max tire size: 295/6520
• Trail Boss Max wheel size: 20x9 with 0 off-set

Refer to the tire fitment guide along with the year make model data. Tire fitments shown are for Maximum size and based on a no rub or no modifications required fitment. ReadyLIFT & Recon Recovery is not responsible if the listed max sizes are exceeded. Due to differences in manufacturing, dimension and inflated measurements, tire and wheel combinations should be test fit prior to installation.

Fitment

• 2019-2025 Chevrolet Silverado 1500 — 4WD
  • 2019-2024 CHEVY SILVERADO1500 TRAIL BOSS: Lift: 2.0" | Max Tire: 295/65 R20 | Wheel Width: 9" | Backspacing: 5.00" | Offset: 0 (***-May require some minor trimming of inner fender well.)
• 2019-2025 GMC Sierra 1500 — 4WD
  • Lift: 2.0" | Max Tire: 275/60-R20 | Wheel Width: 9" | Backspacing: 5.00" | Offset: 0 (***-May require some minor trimming of inner fender well.)

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

Specifications

• Fitment: Direct Fitment
• Front or Rear: Front
• Front Lift Height: 1.75 Inches
• Front Lift Component: Spacer
• Max Tire Size: 295
• Installation Time: 4 Hours
• Install Difficulty: Difficult Requires Professional Installation
• Country of Origin: US

Warranty

READYLIFT® “NO HASSLE” PRODUCT WARRANTY

This unique “no hassle” product warranty proves their commitment to the quality of every product that ReadyLIFT produces. ReadyLIFT product warranty only extends to the Original Purchaser of any ReadyLIFT product. If it breaks, they'll give you a new part.

Any ReadyLIFT products containing missing or defective components will be covered under warranty by ReadyLIFT. Please contact Recon Recovery to initiate a warranty claim. In the event of a defective product, ReadyLIFT may request a return of the defective product (at ReadyLIFT expense) so the quality team can analyze the nature of the defect. Returning defective product will not delay the replacement part delivery.

ReadyLIFT leveling kit, block kits and lift kit products are NOT intended for off-road abuse. Any abuse or damage as a result of off-road use voids the warranty of the ReadyLIFT product. Exception: ReadyLIFT Jeep SST and Terrain Flex Lift Kits are designed for normal off-road use to complement the Jeep vehicle's off-road capability. All Jeep Lift Kit products are covered under warranty when used in recreational off-road environments.

Wearable components including, but not limited to, shocks, ball joints, heim joints, bushings, and steering extensions, are covered for up to 1-year. Labor, installation, surcharges or any other applicable fees from the original purchase are non-refundable. ReadyLIFT is not responsible for any consequential damage to vehicles.

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/product.