BDS 4 Inch Lift Kit | Chevy Trail Boss & GMC AT4 1500 (2019-2026) 4WD Gas | w/ FOX 2.0 Performance Series Shocks

This kit is configured with FOX 2.0 Performance Series rear shocks. FOX 2.0 shocks feature a 2-inch impact extruded aluminum body, an internal floating piston (IFP) monotube design, a massive 5/8-inch hard chrome plated heat-treated alloy steel shaft, CNC machined 6061-T6 aluminum mounting ends, race-developed high-flow piston design, application-specific valving to maximize performance, and a long-lasting clear anodized finish.

Overview

This 4-inch suspension lift kit for the Chevy Trail Boss and GMC AT4 1500 (2019–2026) 4WD Gas is engineered to improve stance, performance, and off-road capability. The kit provides clearance for up to 35-inch tires and utilizes a high-clearance design for improved ground clearance, strength, and off-road protection, while correcting suspension and steering geometry for proper on-road handling.

Up front, the kit includes top-mounted strut spacers, upper control arms, high-arched 1/4-inch thick steel crossmembers, a multipiece differential relocation bracket system, and heavy duty skid plates. Steering geometry is corrected at the new ride height using CNC-machined ductile iron steering knuckles and replacement tie rod ends, maintaining ESC system compatibility. Sway bar drops, bump stop extensions, brake line brackets, CV spacers, and all required hardware are also included. In the rear, a heavy duty lift block replaces the stock block to lift and level the stance while retaining ride quality and load capacity, complemented by new U-bolts and brake line brackets.

Features

• High clearance crossmember design maximizes ground clearance
• Robust CNC-machined ductile cast iron steering knuckles maintain ESC system compliance
• High-strength replacement upper control arms (UCAs) provide durability and serviceability — 1.5-inch OD x .120-wall tubular construction with indexed ball joint cup for additional down travel and camber adjustment
• Durometer-specific rubber bushings at frame mounting ends for maintenance-free operation
• Greaseable ball joints for smooth, quiet operation and superior durability
• UCAs finished in durable black powder coat with billet aluminum dust cap
• HD skid plate system for improved off-road protection — bolts together to create a rigid subframe
• Multipoint differential relocation brackets to secure the front axle and improve CV angles
• Heavy duty rear lift block retains ride quality and load capacity
• Factory Protection Plus drivetrain warranty included

Specifications

• Lift Height: 4 inches
• Crossmember thickness: 1/4-inch thick laser cut steel
• UCA tube construction: 1.5-inch OD x .120-wall tubular steel
• Rear lift: Heavy duty lift block replacing stock block
• Tire clearance: Up to 35 inches
• Includes: Strut spacers, upper control arms, crossmembers, differential relocation brackets, skid plates, steering knuckles, tie rod ends, sway bar drops, bump stop extensions, brake line brackets, CV spacers, lift block, U-bolts, rear shocks, and all required hardware

Installation

• Estimated Time: 8 hours
• Difficulty: Difficult
• Tools Required: 36mm Socket, Cut Off Wheel or Equivalent, Ball Joint Separation Tool, Reciprocating Saw, Welding Equipment

Important Notes

• Requires frame bracket modification.
• Factory 17-inch and 18-inch wheels cannot be reinstalled due to tie rod end interference. Stock 20-inch wheels can be reinstalled.
• 17-inch wheels with 4.5-inch backspacing should be test fit prior to mounting the tire to ensure proper clearance to the steering knuckle and tie rod.
• All aftermarket wheels should be test fit prior to mounting the tire to ensure proper clearance to the brake caliper. Some wheel profiles will not clear the brake caliper. These can be test fitted before the vehicle is lifted in a stock condition.
• 2.7L Turbo models must use the Diesel kit for proper skid plate fitment due to a clearance issue with the intercooler pipe.
• If equipped with a mono-leaf rear spring, please use part #UBT4064.