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3252 W Van Buren st. Phoenix, AZ 85009
3252 W Van Buren st. Phoenix, AZ 85009
4" Rough Country Lift Kit | 2019-2024 GMC Sierra 1500 AT4 & Trailboss | Lifted Struts Kit

4" Rough Country Lift Kit | 2019-2024 GMC Sierra 1500 AT4 & Trailboss | Lifted Struts Kit

by Cosmos Truck Accessories
$1,699.95 - $1,699.95
$1,699.95
$1,699.95 - $1,699.95
$1,699.95

🛠 Rough Country 4” Suspension Lift Kit

For 2019–2024 Chevy Trail Boss & GMC AT4 1500
Not compatible with standard Silverado/Sierra or Denali trims

Elevate Your Truck. Literally.

Transform the aggressive, factory-built design of your fourth-generation Sierra 1500 or Silverado 1500 Trail Boss with Rough Country’s 4-inch Suspension Lift Kit—built to enhance your truck's bold look, off-road potential, and on-road performance.

Designed for Trail Boss and AT4 models, this system delivers the perfect lift-and-level setup, allowing you to run up to 35x12.50 tires on 20” wheels with 4.5” backspacing. Whether it’s your daily commute or your next weekend adventure, you’ll enjoy enhanced ground clearance, better geometry, and uncompromised ride quality.

📦 What’s Included:

  • Front & Rear High Clearance Crossmembers for improved geometry

  • Cast Steel Lifted Knuckles for extreme durability

  • Front Skid Plate for added chassis protection

  • Fabricated Rear Lift Blocks (stronger & longer-lasting than cast)

  • Front & Rear N3 Series Shocks or upgrade options

  • All necessary hardware

🔧 Key Features:

  • Lifts and levels front-to-rear stance

  • Maintains factory ride quality

  • No strut disassembly required

  • No trimming of the front differential

  • Maintains stock track width

  • Laser-cut components for precision fitment

  • Compatible with up to 10” wide wheels (minimum 4.5” backspacing)

🛞 Tire & Wheel Fitment:

  • ❌ Does not fit factory wheels

  • ✅ Requires 20” or larger aftermarket wheels

  • ✅ Must use 4.5” backspacing

  • ⚠️ Some aftermarket wheels may require 0.25” wheel spacer (#1065)

  • 📏 Always test fit wheels prior to installation for brake caliper clearance

🚫 Fitment Exclusions:

  • Does NOT fit:

    • 2025 models with multi-leaf springs

    • GMC Denali w/ Magnetic Ride Control

    • Models w/ Multimatic DSSV suspension (ZR2/AT4X)

    • Vehicles with two-piece rear driveshafts

    • 2019 “Classic” (2018 body style)

    • Non-Trail Boss (Chevy) or Non-AT4 (GMC) models

    • Trucks with composite leaf springs

  • Cutting and drilling required

🚀 Shock Options:

N3 Series Shocks (Standard)

  • Application-specific valving

  • Infinitely variable damping

  • Large 1-3/8” bore

  • Leak-proof piston seal

  • Silver powder coat

  • 3-Year Warranty

V2 Monotube Upgrade

  • Monotube w/ internal floating piston

  • Nitrogen-charged for fade resistance

  • 46mm piston w/ fast heat dissipation

  • Mounts inverted w/ T6061 brushed aluminum body

  • 3-Year Warranty

Vertex Reservoir Upgrade

  • 2.5” Monotube Design

  • 8-stage adjustable damping

  • Chrome-hardened 22mm piston rod

  • External reservoir for cooling and consistency

  • Hardened alloy bearing, honed steel body

  • 3-Year Warranty

💯 Backed by Rough Country's Lifetime Replacement Guarantee

Whether you’re after killer looks, increased clearance, or rugged off-road capability, the Rough Country 4” Lift Kit gives your Trail Boss or AT4 a serious performance and style upgrade—without compromising the factory feel.
Fitment