---
product_id: 181590508
title: "ReadyLift 66-3921 1.75'' Leveling Kit"
brand: "readylift"
price: "€ 1009.47"
currency: EUR
in_stock: true
reviews_count: 10
category: "Readylift"
url: https://www.desertcart.sk/products/181590508-readylift-66-3921-1-75-leveling-kit
store_origin: SK
region: Slovakia
---

# 1.75'' precise front lift Vehicle-specific fit for GM 1500 Heavy-duty tubular upper control arms ReadyLift 66-3921 1.75'' Leveling Kit

**Brand:** readylift
**Price:** € 1009.47
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your GM 1500’s style and performance with precision-engineered lift!

## Quick Answers

- **What is this?** ReadyLift 66-3921 1.75'' Leveling Kit by readylift
- **How much does it cost?** € 1009.47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/181590508-readylift-66-3921-1-75-leveling-kit)

## Best For

- readylift enthusiasts

## Why This Product

- Trusted readylift brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Upgrade Your Tire Game:** Supports larger tires up to 305/60/20 with minimal trimming, giving your truck an aggressive, head-turning profile.
- • **Perfectly Balanced Lift:** Achieves a 1.75'' front lift for a sleek, level stance that commands attention.
- • **Tailored for GM 1500 Trucks:** Engineered specifically for AT4 and Trail Boss models to avoid fitment issues and maintain factory geometry.
- • **Durability Meets Performance:** Constructed from alloy steel with heavy-duty replaceable ball joints and maintenance-free pivot bushings for long-lasting reliability.
- • **Effortless Installation & Ride Quality:** Designed for easy install with improved steering feel—no compromise on comfort or control.

## Overview

The ReadyLift 66-3921 Leveling Kit delivers a precise 1.75-inch front lift tailored for GM 1500 AT4 and Trail Boss trucks. Crafted from durable alloy steel, it includes heavy-duty tubular upper control arms with advanced Terrain Control Technology bushings to maintain factory suspension geometry and improve alignment retention. This kit enables fitting larger tires up to 305/60/20, enhancing your truck’s aggressive stance without sacrificing ride quality or steering responsiveness. Easy to install and engineered for vehicle-specific fit, it’s the ultimate upgrade for leveling and performance.

## Description

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

Review: A must have for all Trail Boss/AT4 owners! - 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!
Review: Great leveling kit and great price - 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.

## Features

- Fit type: Vehicle Specific

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07XD7YXML |
| Auto Part Position | Front |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #253,148 in Automotive ( See Top 100 in Automotive ) #435 in Automobile Chassis Body & Suspension Lift Kits |
| Brand | Readylift |
| Customer Reviews | 4.6 4.6 out of 5 stars (124) |
| Date First Available | September 5, 2019 |
| Exterior | Machined |
| Global Trade Identification Number | 00804879610489 |
| Included Components | 1.75'' Leveling Kit |
| Item Weight | 24 pounds |
| Item model number | 66-3921 |
| Manufacturer | ReadyLift |
| Manufacturer Part Number | 66-3921 |
| Material | Alloy Steel |
| Maximum Lifting Height | 2 Inches |
| Model | 66-3921 |
| Product Dimensions | 16 x 12 x 6 inches |
| UPC | 804879610489 |

## Product Details

- **Auto Part Position:** Front
- **Brand:** Readylift
- **Included Components:** 1.75'' Leveling Kit
- **Material:** Alloy Steel
- **Maximum Lifting Height:** 2 Inches

## Images

![ReadyLift 66-3921 1.75'' Leveling Kit - Image 1](https://m.media-amazon.com/images/I/71BeRqEojnL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ A must have for all Trail Boss/AT4 owners!
*by B***R 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!

### ⭐⭐⭐⭐⭐ Great leveling kit and great price
*by K***D 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.

### ⭐⭐⭐⭐⭐ Perfect for AT4
*by A***N 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!

## Frequently Bought Together

- ReadyLift 66-3921 1.75'' Leveling Kit
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**Shop now:** [https://www.desertcart.sk/products/181590508-readylift-66-3921-1-75-leveling-kit](https://www.desertcart.sk/products/181590508-readylift-66-3921-1-75-leveling-kit)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-02*