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Current Product/Shipping/Lead Time Updates

4 Inch Lift Kit | AT4/Trailboss | Chevy/GMC 1500 (19-23)

SKU 27531
Model Type
Front Configuration
Rear Configuration


GM’s 2019 silverado and sierra features an impressive all-new design that’s built from the ground up, with aggressive angles and head-turning stylings that fit in beautifully when transformed with Rough Country’s 4in Suspension Lift for Trailboss / AT4 models.

This kit lifts and levels your vehicle for a commanding stance and enough clearance to run 35x12.50 tires on 10in wide wheels. Rough Country has engineered this kit to provide optimal suspension geometry while retaining the factory ride quality, giving you enhanced off-road capabilities without sacrificing the handling and smooth ride that makes this truck so impressive.

Rough Country’s 4in Suspension lift retains the stock track width, allowing for up to a 10in wide wheel with 4.5in backspacing. Each kit includes front and rear crossmembers and a skid plate for enhanced chassis strength as well as cast steel knuckles for incredible durability and performance. Includes Rough Country’s Lifetime Replacement Guarantee!


    • Lifts and levels the vehicle from front to rear
    • High clearance crossmember design for optimal suspension geometry
    • Includes cast knuckles for extreme durability
    • Retains stock track width
    • No strut disassembly required
    • No differential trimming required!
    • 100% precision laser cut materials using the latest computer aided design process.
    • Fabricated blocks are stronger and offer a longer lifespan than cast blocks.
    • Includes application valved N3 series shock absorbers which offer the best in balanced performance for on and off-road use.


  • Includes pre-loaded coil
  • Maintains smooth, factory-like ride
  • Increased ground clearance
  • Engineered for lifted applications
  • Infinitely Variable Damping
  • Leak-proof piston seal
  • Massive 1 3/8in Bore
  • Silver powder coat finish
  • 3-year Manufacturer's Warranty


  • Monotube design
  • Internal floating piston
  • Nitrogen-charged
  • 46mm high-flow piston
  • Fast heat dissipation
  • 36kN Tensile Strength
  • Mounts inverted
  • T6061 brushed aluminum body
  • 3-year Manufacturer's Warranty


  • 8-Stage Adjustable Damping
  • Monotube Design
  • Nitrogen-charged
  • Massive 2.5in Piston
  • 22mm Chrome-Hardened Piston Rod
  • 3-Stage Seal System
  • Heat-Treated, Alloy Bearing
  • Honed Steel Body
  • 3-year Manufacturer's Warranty


      • Does NOT fit GMC Denali models with Magnetic Ride Control.
      • Does NOT fit models equipped with Multimatic DSSV suspension. (AT4X)
      • Does NOT fit models with two piece rear driveshaft.
      • Does NOT fit 2019 "Classic" models (2018 body style)
      • ONLY fit Trailboss models (Chevy)
      • ONLY fits AT4 models (GMC)
      • Does NOT fit standard models or other trims (GMC)
      • Does NOT fit models with equipped with composite leaf springs.
      • Requires cutting and drilling.


    • Does NOT fit factory wheels
    • 20-inch or larger aftermarket wheels are required.
    • Wheels must feature 4.5in backspacing to fit
    • Please test fit wheels prior to installation
    • Must verify compatibility of the aftermarket wheel with the 2019 and up GM larger brake caliper system.
    • Some aftermarket wheels may require .25" wheel spacer #1065.

      Est. Install Time 8-10 hours

      • Lifted knuckles
      • Front crossmember
      • Rear crossmember
      • Upper strut spacers
      • Lower strut spacers
      • Differential drop brackets
      • Differential skid plate
      • Sway-bar drop brackets
      • Hardware
      • Fabricated lift blocks
      • Brake line brackets
      • U-bolts
      • Hardware
      • (2) Rear Premium N3 series


      35x12.50R20 20x9 6x5.5 -12 -
      295/65R20 20x9 6x5.5 -12 -
      35x12.50R20 20x9 6x5.5 -6 0.25 Spacer
      295/65R20 20x9 6x5.5 -6 0.25 Spacer
      35x12.50R20 20x10 6x5.5 -25 Minor Trimming
      295/65R20 20x10 6x5.5 -25 -
      35x12.50R20 20x10 6x5.5 -24 Minor Trimming
      295/65R20 20x10 6x5.5 -24 -
      35x12.50R20 20x10 6x5.5 -19 Minor Trimming
      295/65R20 20x10 6x5.5 -19 -
      35x12.50R20 20x10 6x5.5 -18 Minor Trimming
      295/65R20 20x10 6x5.5 -18 -
      35x12.50R20 20x12 6x5.5 -44 Trimming Required
      35x12.50R22 22x10 6x5.5 -25 Minor Trimming
      35x12.50R22 22x10 6x5.5 -24 Minor Trimming
      35x12.50R22 22x10 6x5.5 -19 Minor Trimming
      35x12.50R22 22x10 6x5.5 -18 Minor Trimming
      35x12.50R22 22x12 6x5.5 -44 Trimming Required
      Does NOT fit factory wheels
      0.25” wheel spacer may be required with some aftermarket wheel configurations.