ReadyLIFT 1.75'' Leveling Kit (2019-2022 Chevrolet/GMC Silverado 1500 Trail Boss/GMC Sierra 1500 AT4 4WD) (66-3921) ReadyLIFT 1.75'' Leveling Kit (2019-2022 Chevrolet/GMC Silverado 1500 Trail Boss/GMC Sierra 1500 AT4 4WD) (66-3921) ReadyLIFT Suspensions IMPORTANT: ALWAYS READ ENTIRE PRODUCT DESCRIPTION, INCLUDING NOTES AND FITMENT INFORMATION, BEFORE MAKING PURCHASE. Overview 1.75" front leveling lift for 2019-2022 GM AT4 and Trail Boss Includes DOM tube steel upper control arms with TCT maintenance-free pivot bushings and 1-ton ball joints CNC machined aircraft-grade billet aluminum top and bottom strut spacers AT4 - Max tire 275/60-20, 20x9 0 offset wheel Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with NO trimming!   Details 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. Tire Fitment 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 wheelTrail Boss - Max tire 295/65-20, 20x9 0 offset wheelIf re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with NO trimming!Tire Size Note: ReadyLIFT wheel and tire fitment recommendations are typically based on Wheel Pros wheels and Nitto tires. Due to product differences among tire manufacturers, tire specifications and dimensions including, but limited to, overall diameter, rolling diameter, tread width, aspect ratio, lug pattern, sidewall construction and inflation pressure, will vary meaningfully by tire and wheel manufacturer. Every tire and wheel combination should be test fit prior to installation. Consult your local installer to learn more about the right tire fitment for your application.Ride Quality Note: When lifting a vehicle and installing aftermarket wheels and tires, a tire manufacturer's construction and material quality can alter vehicle ride quality. When increasing a vehicle wheel and tire size, most larger aftermarket truck and SUV tires are 10-ply (or more) E tires compared to typical OEM 6-ply C tires. This more rigid sidewall construction increases the perception of suspension stiffness often described as ride harshness. The ride, handling, traction, noise, fuel economy, and wear differences between All-Season, All-Terrain, Mud-Terrain, or Trail-Terrain type tires can be significant. Please take into account tire and wheel choice will generally have a meaningful impact on the ride & handling experience.   Kit Components Heavy Duty tubular steel upper control arms with TCT maintenance free pivot bushings and heavy-duty 1-ton ball joints. CNC machined billet aluminum top and bottom mount strut spacers.   Installation Instructions (PDF) Est. Installation Time: 3.5 Hours +/- 0.5 hours (excluding alignment and wheel/tire assembly)

ReadyLIFT 1.75'' Leveling Kit (2019-2022 Chevrolet/GMC Silverado 1500 Trail Boss/GMC Sierra 1500 AT4 4WD) (66-3921)

Code: 66-3921
$499.95
In Stock
  • FREE SHIPPING

  • 30 DAY RETURNS

  • LIVE SUPPORT

IMPORTANT: ALWAYS READ ENTIRE PRODUCT DESCRIPTION, INCLUDING NOTES AND FITMENT INFORMATION, BEFORE MAKING PURCHASE.


Overview

  • 1.75" front leveling lift for 2019-2022 GM AT4 and Trail Boss
  • Includes DOM tube steel upper control arms with
  • TCT maintenance-free pivot bushings and 1-ton ball joints
  • CNC machined aircraft-grade billet aluminum top and bottom strut spacers
  • AT4 - Max tire 275/60-20, 20x9 0 offset wheel
  • Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel
  • If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with NO trimming!

 

Details

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.

Tire Fitment

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

If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with NO trimming!

Tire Size Note: ReadyLIFT wheel and tire fitment recommendations are typically based on Wheel Pros wheels and Nitto tires. Due to product differences among tire manufacturers, tire specifications and dimensions including, but limited to, overall diameter, rolling diameter, tread width, aspect ratio, lug pattern, sidewall construction and inflation pressure, will vary meaningfully by tire and wheel manufacturer. Every tire and wheel combination should be test fit prior to installation. Consult your local installer to learn more about the right tire fitment for your application.

Ride Quality Note: When lifting a vehicle and installing aftermarket wheels and tires, a tire manufacturer's construction and material quality can alter vehicle ride quality. When increasing a vehicle wheel and tire size, most larger aftermarket truck and SUV tires are 10-ply (or more) E tires compared to typical OEM 6-ply C tires. This more rigid sidewall construction increases the perception of suspension stiffness often described as ride harshness. The ride, handling, traction, noise, fuel economy, and wear differences between All-Season, All-Terrain, Mud-Terrain, or Trail-Terrain type tires can be significant. Please take into account tire and wheel choice will generally have a meaningful impact on the ride & handling experience.

 

Kit Components

  • Heavy Duty tubular steel upper control arms with TCT maintenance free pivot bushings and heavy-duty 1-ton ball joints.
  • CNC machined billet aluminum top and bottom mount strut spacers.

 

Installation

Instructions (PDF)

Est. Installation Time: 3.5 Hours +/- 0.5 hours (excluding alignment and wheel/tire assembly)

IMPORTANT: ALWAYS READ ENTIRE PRODUCT DESCRIPTION, INCLUDING NOTES AND FITMENT INFORMATION, BEFORE MAKING PURCHASE.


Overview

  • 1.75" front leveling lift for 2019-2022 GM AT4 and Trail Boss
  • Includes DOM tube steel upper control arms with
  • TCT maintenance-free pivot bushings and 1-ton ball joints
  • CNC machined aircraft-grade billet aluminum top and bottom strut spacers
  • AT4 - Max tire 275/60-20, 20x9 0 offset wheel
  • Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel
  • If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with NO trimming!

 

Details

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.

Tire Fitment

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

If re-using factory wheels on a Trail Boss, you can run max tire size 285/75R18 with NO trimming!

Tire Size Note: ReadyLIFT wheel and tire fitment recommendations are typically based on Wheel Pros wheels and Nitto tires. Due to product differences among tire manufacturers, tire specifications and dimensions including, but limited to, overall diameter, rolling diameter, tread width, aspect ratio, lug pattern, sidewall construction and inflation pressure, will vary meaningfully by tire and wheel manufacturer. Every tire and wheel combination should be test fit prior to installation. Consult your local installer to learn more about the right tire fitment for your application.

Ride Quality Note: When lifting a vehicle and installing aftermarket wheels and tires, a tire manufacturer's construction and material quality can alter vehicle ride quality. When increasing a vehicle wheel and tire size, most larger aftermarket truck and SUV tires are 10-ply (or more) E tires compared to typical OEM 6-ply C tires. This more rigid sidewall construction increases the perception of suspension stiffness often described as ride harshness. The ride, handling, traction, noise, fuel economy, and wear differences between All-Season, All-Terrain, Mud-Terrain, or Trail-Terrain type tires can be significant. Please take into account tire and wheel choice will generally have a meaningful impact on the ride & handling experience.

 

Kit Components

  • Heavy Duty tubular steel upper control arms with TCT maintenance free pivot bushings and heavy-duty 1-ton ball joints.
  • CNC machined billet aluminum top and bottom mount strut spacers.

 

Installation

Instructions (PDF)

Est. Installation Time: 3.5 Hours +/- 0.5 hours (excluding alignment and wheel/tire assembly)

IMPORTANT COVID-19 NOTE: 
Our warehouses are open and continuing to ship orders. However, please note that nearly all automotive parts manufacturers, distribution centers, and logistics centers face backorders and delays in order fulfillment.
 
If an item is unexpectedly out of stock or delayed, Lift Kits 4 Vets will make an effort to notify the customer, provide order status updates, and expedite the fulfillment process. If you have any questions pertaining to your order status, please use the Contact link above. We thank you for your patience and understanding.
 
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Lift Kits 4 Vets provides shipping within the contiguous 48 states only. For orders outside of this area, please use the Contact page prior to placing your order. Items shipped by ground or LTL generally arrive within 1-5 days from date of shipment. Lift Kits 4 Vets is not responsible for carrier shipping delays.

Returns & Refunds

Items in their original condition may be returned within 30 days from the date of purchase for a full refund. Items may NOT be returned once packaging has been opened or the item has been installed, otherwise used, or damaged. The buyer is responsible for all return shipping charges. Returns and refunds may be requested through the Contact page.

Note: Do NOT ship items back until you have received a return authorization, as items may be returned to a facility other than their point of origin. Refunds will generally be processed within 48 business hours of receipt at our warehouse in order to allow for inspection and processing.

Product Data
Lift Kits 4 Vets provides product data (including but not limited to item descriptions, important notes, and fitment information) as a courtesy only. This information is provided by product manufacturers and is assumed to be accurate at the time of publishing. Though Lift Kits 4 Vets may periodically audit and update some product information based upon manufacturer's published data revisions, Lift Kits 4 Vets does not guarantee the accuracy of any product data. Lift Kits 4 Vets reserves the right to update product data as necessary and without notice, and will not be held responsible for misprints, or changes/variations made by vehicle manufacturers. Customers should consult the product manufacturer's website for the most up-to-date product data.
 
Markdown & Open Box Items
Markdown and Open Box items are offered at a discount as they have either been overstocked, slightly damaged, and/or returned from a previous customer. Items are sold "as-is." Lift Kits 4 Vets will indicate any damage found during the inspection process. Please note that this does not guarantee that all defects have been identified. Sales for all items in this category are final. No refunds, exchanges, or replacements are permitted. Some manufacturers may continue to warranty such items; however, the purchaser accepts that some manufacturers may not extend warranties to items in this category. Please refer to the individual product manufacturer's warranty page for details.

F.A.Q.
How do I request a return?
Use the Contact page, ensuring to include your order number, contact information, items for return, and reason for return. One of our team members will contact you with return shipping details and instructions. Additional information and documentation may be required.
Note: Some items must be returned directly to the manufacturer. Please do not ship items to  Lift Kits 4 Vets prior to return authorization and return instructions.

How do I request a replacement for a missing or damaged part?
Upon receipt, please inspect all orders for completion, accuracy, and damage. If packaging appears to be damaged, ensure to photograph the damage, as this may be required for a shipping carrier claim.
Use the Contact page, ensuring to include your order number, contact information, and description of the incorrect or damaged part(s). One of our team members will contact you to correct the issue.

What product warranties does Lift Kits 4 Vets offer?
Product warranties are solely offered by product manufacturers. Please refer to the product manufacturer's warranty statement. In the event of a warranty claim,  Lift Kits 4 Vets is available to assist with the manufacturer's required documentation. Please use the Contact page if assistance is required.
Estimated order processing times for in-stock items.
To check stock levels, use our Live-Chat feature or Contact page.
 
 Manufacturer Estimated Lead Time
BDS Suspension
1-2 Days
Morimoto 1-2 Days
ReadyLIFT Suspensions 1-7 Days
Rough Country 1-2 Days
Zone Offroad 1-2 Days