2019-2024 Chevy Trail Boss/GM AT4 4wd 4" Suspension System - Diesel - NX2

Take your Chevy Trail Boss and GMC AT4 1500 truck to the next level with 4-inch suspension lift kit by BDS. Designed to improve stance, performance, and capability, this kit includes everything necessary to set your truck up right with clearance for up to 35 inch Tires.

This kit takes advantage of BDS's tried and true high-clearance design for improved ground clearance, strength, and offroad protection while correcting suspension and steering geometry for great on-road handling characteristics. Up front, the kit utilizes top mounted strut spacers, upper control arms, high-arched 1/4-inch thick steel crossmembers along with a multipiece differential relocation brackets and heavy duty skid plates built for offroad protection.

Steering geometry is corrected at the new taller ride height with CNC-machined ductile iron steering knuckles and replacement tie rod ends allowing for ESC system compatibility. These combined with the provided sway bar drops, bump stop extensions, brake line brackets, CV spacers, supplied hardware and more provide a comprehensive front suspension lift ready for whatever you throw at it.

In the rear BDS offers a heavy duty lift block to lift and level that stance. The lift block installs in place of the stock block and retains ride quality and load capacity. Also for the rear are new u-bolts, brake line brackets and precision tuned NX2 Nitro or premium FOX 2.0 Performance Series shocks.

HD Upper Control Arms (UCAs)

Built for strength, performance and increased travel, these upper control arms are ready to bolt-in with most leveled/lifted trucks. They use 1.5 inch OD x .120-wall tubular construction with an indexed ball joint cup to correct the ball joint positioning allowing additional down travel and camber adjustment.

At the frame mounting ends are durometer-specific rubber bushings for maintenance-free operation while at the other end a quality greaseable ball joints for smooth, quiet operation and superior durability. Arms are finished in a durable black powder coat with a billet aluminum dust cap ready for installation right out of the box.

High Clearance Crossmembers

BDS maximizes ground clearance with their heavy duty 1/4-inch thick laser cut perfect fit crossmembers. Paired with a front skid plate system that bolts together to create a rigid subframe while adding extra protection.

Heavy Duty Steering Knuckles

BDS corrects steering geometry at the new taller ride height using a pair of high-strength, CNC machined ductile cast iron steering knuckle design to work with replacement tie rod ends to maintain steering angles for proper function and ESC compatibility.

• Front Lift Method: Cross-Member
• Rear Lift Method: Block
• Shocks Included: Yes
• Front Lift Height: 4 inch
• Rear Lift Height: 4 inch

1. Requires frame bracket modification
2. Factory 17 inch and 18 inch wheels cannot be reinstalled due to tie rod end interference, stock 20 inch wheels can be reinstalled.
3. 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 / tie rod.
4. 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.
5. 2.7L Turbo models use Diesel kit for proper skid plate fitment..
6. If equipped with a mono-leaf rear spring please use part #UBT4064.

• High clearance crossmember design maximizes ground clearance
• Robust steering knuckles maintain ESC system compliance
• High-strength replacement upper control arms provide durability and serviceability
• HD skid plate system improved offroad protection
• Multipoint differential relocation brackets to secure the front axle and improve CV angles
• Factory Protection Plus drivetrain warranty included

Rear Shock Option NX2 Nitro Series

• Nitrogen-charged
• Twin-tube design
• 10-stage velocity-sensitive valving
• Dual-welded ends for increased strength
• 1-3/8-inch high-flow piston
• Self-lubricating seals
• Silver powder coat finish

Tire Size: 34 x 12.5 Tire Size 2: 35 x 12.5 Wheel Diameter: 18 x 9 Wheel Diameter 2: 20 x 9 Back Spacing: 4.5/6.25

Kit Components:

• Includes one BDS011518, 2019-2024 Chevy/GMC 1500 5 inch Rear Box Kit, UPC Code 658848611935
• Includes one BDS021405, 2019-2024 Chevy/GMC 4 inch Strut Spacer Box, UPC Code 658848614639
• Includes one BDS021664, 2019-2024 Chevy/GMC 1500 Knuckle Box 1of2 w/UCA (4 inch and 6 inch Compatible), UPC Code 658848615056
• Includes one BDS021665, 2019-2024 Chevy/GMC 1500 Knuckle Box 2of2 w/UCA (4 inch and 6 inch Compatible, UPC Code 658848615063
• Includes one BDS021682, 2019-2024 Chevy/GMC 1500 6 inch Front Box Kit 1of2, UPC Code 658848615131
• Includes one BDS021685, 2019-2024 Chevy/GMC 1500 6 inch Diesel Front Box Kit 2 of 2, UPC Code 658848615162
• Includes two BDS85759, Shock- 29.80 x 17.60 x 2-3/8 - EB1/EB1, UPC Code 711745609686