• BDS 4" Suspension Lift Kit
BDS749H

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

  • $1,981.92

Chevy Trail Boss/ GMC AT4.
Go even further with your Trail Boss or AT4 with these 4" IFS systems. Engineered for not only offroad capability with clearance for up to 37s, this kit maintains on-road handling and has been confirmed compliant with FMVSS 126 (ESC System) standards. This kit is designed to net 4" of lift from the factory ride height (which will sit similar to a 6" on non-Trail Boss/AT4 trucks). At the heart of this BDS 4" IFS system are a pair of 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 while also allowing a wider range of wheel fitment options to include factory 20" wheels. 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. Additional ride height on this particular kit comes from a set of top mounted steel fabricated strut spacers to mount onto the factory strut assemblies. 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. Also supplied are new lower control arm cam bolts to allow alignment and a weld-in frame reinforcement plate for extra strength. In the rear lift blocks and longer u-bolts lift and level the stance and your choice of NX2 gas or FOX 2.0 performance series gas shocks are supplied to round out this kit allowing room for 35-37" tires to be installed. Check instructions for additional tire & wheel fitment combinations.

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 Adaptive Ride Control (ARC) equipped models
4. Factory 17" and 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. Front skid plate will not work with 2.7L Turbo Engines.

Lift Height
Front (Base Kit): 4 in High Clearance IFS System
Rear (Base Kit): 4 in Block Kit

Tire and Wheel Combinations
37"x12.50 with 20x9/22x9(Chevy) and 5.5" backspacing
35"x12.50 with 20x9/22x9(GMC) and 5.5" - 6.25" backspacing
34"x12.50 with 17x8/17x9/18x9 and 4.5" backspacing
*Trimming may be required* 

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

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

Instructions
PDF (click here)

Qty Part# Description
(1) 011518 2019-20 GM 1500 5in Rear Box Kit
(1) 021405 2019 Chevy/GM 4" Strut Spacer Box
(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
(2) 85759 BDS NX2 Shock Absorber

*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.