Skip to content
3252 W Van Buren st. Phoenix, AZ 85009
3252 W Van Buren st. Phoenix, AZ 85009
4" BDS Lift Kit | 2019-2024 AT4 1500 & Chevy Trailboss 1500 | Fox 2.0s

4" BDS Lift Kit | 2019-2024 AT4 1500 & Chevy Trailboss 1500 | Fox 2.0s

by Cosmos Truck Accessories
$2,506.31 - $2,506.31
$2,506.31
$2,506.31 - $2,506.31
$2,506.31

BDS 4" Suspension Lift Kit

Fits 2019–2024 Chevy Trail Boss / GMC AT4 1500 (Gas & Diesel Models)
Engineered for Bold Stance and Superior Capability.

Elevate Your Truck. Conquer Any Terrain.

Take your Chevy Trail Boss or GMC AT4 1500 to the next level with BDS Suspension’s 4-inch lift system, engineered to improve ride quality, performance, and trail-conquering capability. With clearance for up to 35" tires, this kit offers a taller, more aggressive stance while preserving smooth handling on-road and superior durability off-road.

🔧 System Highlights:

  • High-clearance crossmembers and differential relocation brackets improve ground clearance and geometry

  • HD upper control arms enhance suspension articulation and durability

  • CNC-machined ductile iron knuckles maintain ESC system compatibility

  • Heavy-duty skid plate system protects your undercarriage

  • Top-mounted strut spacers retain factory ride quality

  • Heavy-duty lift blocks and u-bolts in the rear to level your truck

  • Precision-engineered to maintain ride quality, alignment specs, and load-carrying capacity

🛠 HD Upper Control Arms (UCAs)

Built from 1.5” OD x .120-wall tubing, BDS UCAs feature:

  • Indexed ball joint cup for corrected geometry

  • Durometer-specific rubber bushings (maintenance-free)

  • Pre-installed, greaseable ball joints for silent, reliable function

  • Durable black powder coat finish & billet aluminum dust caps

💥 High Clearance Crossmembers & Skid Plate

  • 1/4" laser-cut steel for maximum durability

  • Bolted skid plate system creates a rigid subframe and added protection

🧭 Heavy Duty Knuckles

  • CNC-machined, ductile cast iron

  • Corrects steering geometry at lifted height

  • Compatible with factory tie rod ends and ESC systems

🛞 Recommended Tires & Wheels

(Trimming may be required)

  • 34 x 12.5 on 17 x 9 w/ 4.5” backspacing

  • 34 x 12.5 on 18 x 9 w/ 4.5” backspacing

  • 35 x 12.5 on 20 x 9 w/ 6.25” backspacing

💡 Fitment Notes & Wheel Guidelines

  • Requires frame bracket modification

  • Factory 17" and 18" wheels cannot be reused (tie rod interference)

  • Stock 20" wheels can be reused

  • 17" wheels w/ 4.5” BS should be test fit before tire mounting to confirm clearance

  • All aftermarket wheels should be test fit to ensure brake caliper clearance

  • 2.7L Turbo models require use of Diesel kit for proper skid plate alignment

  • Trucks equipped with mono-leaf rear springs must use part #UBT4064

🛠 Rear Shock Options

NX2 Nitro Series

  • Twin-tube, nitrogen-charged

  • 10-stage velocity-sensitive valving

  • Dual-welded ends for durability

  • 1-3/8" high-flow piston

  • Silver powder-coated finish

FOX 2.0 Performance Series

  • 2” impact-extruded 6061-T6 aluminum body

  • IFP monotube design with application-specific tuning

  • 5/8” hard chrome-plated alloy steel shaft

  • Race-developed high-flow piston

  • Long-lasting clear anodized finish

✅ Why Choose BDS?

  • Factory Protection Plus Warranty

  • Uncompromising strength, ride quality, and off-road performance

  • Compatible with gas and diesel models

  • Proudly engineered and tested in the USA
Fitment