• BDS 4" Coilover Systems

BDS 4" Coilover Lift Kit for 2019-2020 Chevy/GMC 1500 Pickup 4WD Trail Boss/AT4

  • $3,859.29

Take your late model Chevy Trail Boss or GMC AT4 to the next level with one of the BDS 4" high clearance coilover systems.
These kits net 4" lift on a Trail Boss/AT4, however final ride height is similar to a GM1500 with 6" of lift. At the heart of these new systems are a pair of precision tuned FOX 2.5 factory race series remote reservoir coilovers engineered to outperform on and offroad as they soak up the terrain. These coilovers are preset for the correct lift height right out of the box to provide optimal performance and direct bolt-in replacement for the factory strut assemblies. They feature a smooth bore and honed seamless alloy body, 7/8" hardened steel carbon shaft, Eibach coil springs and black anodized machined 6061-T6 billet aluminum mounts along with remove reservoirs with mounting brackets. The reservoir is available with optional DSC (dual speed compression) adjustment technology built in to allow for easy adjustment of the vehicle's suspension compression dampening so you can dial in the ideal ride performance to soak up the bumps, both large and small. Adjustments can be made by simply twisting the knobs located on the end of the reservoir. To go along with the coilovers are a pair of specially designed 1/4" thick laser cut high clearance crossmembers to maximize clearance and provide a solid mounting point for the OE lower control arms. These paired with the 3-piece heavy duty front skid plate system create a rigid subframe while adding protection for vital steering and driveline components. In place of the factory steering knuckles a pair of specially designed ductile iron replacement steering knuckles are supplied to maintain proper steering geometry for ESC system compatibility. These connect to the factory steering with a pair of heavy duty replacement tie rod ends included in the kit. The front differential is repositioned with BDS's multipoint relocation bracket system tying into the frame and control arm pockets to further secure the front differential to keep CV axle angles at a minimum. A billet aluminum front driveshaft spacer is also supplied along with longer hardware to allow the reinstallation of the factory driveshaft. A pair of BDS-branded sway bar drop brackets used to correct the operating angle of the factory sway bar as well as created a strong brace between the rear crossmember and the frame. Rounding out the front of this kit are new lower control arm cam bolts to allow alignment and a weld-in frame reinforcement plate for extra strength.
In the rear of this 4" lift system, the factory block is replaced with a 5" lift block and longer u-bolts to lift and level the stance. Also included, BDS supplies brake line and ABS line brackets allow the use of factory brake lines. Specially tuned FOX 2.0 IFP performance series gas shocks are supplied to round out the rear of these kits. All kits come finished in a durable textured black powdercoat and sent with all hardware packs to complete the install along with step-by-step installation instructions. All BDS kits include Factory Protection Plus for the ultimate extended warranty to include BDS's No Fine Print Warranty, FMVSS No.126 (ESC System) compliance certification and a 5year-100mile drivetrain warranty to match the dealer.

Note: Components displayed in images may change based upon selections.

1. Does NOT fit Diesel Models
2. Requires frame bracket modification
3. Will not fit models with Adaptive Ride Control (ARC)
4. Factory 17-18" wheels cannot be reinstalled due to tie rod end interference, stock 20" wheels can be reinstalled
5. 17" wheels with 4.5" backspacing should be test fit prior to mounting the tire to ensure proper clearance to the steering knuckle / tie rod
6. 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
7. Actual ride height on coilover kits is closer to 4.5" of lift on Trail Boss/AT4

Lift Height
Front (Base Kit): 4" in Fox 2.5" Coilover
Rear (Base Kit): 4" in Block and U-Bolt

Tire and Wheel Combinations
37x12.50 with 20x9/22x9 and 5.5-6.25" backspacing
35x12.50 with 20x9/22x9 and 5.5-6.25" backspacing
35x12.50 with 17x9/18x9/20x9 and 4.5" backspacing
*Trimming may be required* 

Make Model Type Lift Year Range
Chevy / GMC 1/2 Ton Pickup 4WD Trail Boss / AT4 6" 2019-2020

Difficulty Level (1 easy – 5 complicated): 4
Estimated Installation Time (hours): 8

PDF (click here)

Qty Part# Description
(1) 011518 2019-20 GM 1500 5in Rear Box Kit
(1) 021680 2019-20 GM 1500 Knuckle Box 1of2
(1) 021681 2019-20 GM 1500 Knuckle Box 2of2
(1) 021682 2019-20 GM 1500 6in Front Box Kit 1of2
(1) 021683 2019-20 GM 1500 6in Front Box Kit 2of2
(1) 121633 2019-20 Chevy/GMC 1500 Coilover Reservoi
(1) 88302160 Kit: BDS 19-20 Chevy 1500 Front Coilover
(2) 98224759 Fox 2.0 Shox 29.8 x 12.6 x 2 -EB1-EB1

*Subject to change based upon selections

No Fine Print Warranty
BDS stands behind its products and that’s evident by their No Fine Print Warranty. This no-BS warranty protects the original purchaser against breakage, bending, sagging, or any other usage failure. This “no fine print” lifetime replacement warranty extends to cover all BDS hard parts as well as bushings. Exclusions would be product finish and wearable items such as shock/stabilizer cylinders, tie rod ends and ball joints that would fall under the separate Limited Lifetime Warranty policy. Beginning February 1, 2020 all new kit purchases include the No Fine Print Warranty on bushings.

Limited Lifetime Warranty (for wearable items)
Wearable items include shock/steering stabilizer cylinders, ball joints and tie rod ends. BDS Suspension Co. warrants to the original retail purchaser that its these wearable parts are free from defects in material and workmanship for so long as they own the vehicle. Excluded from this warranty are the finish of the product. Defects in material and workmanship do not include such things as dented cylinders or bent rods caused by obvious side impact, rust or corrosion. A shock absorber is a wear item and over time will experience diminished damping resistance due to normal component wear. This is not a defect in material or workmanship and is therefore not warrantable.