BDS 4" Lift Kit (2019-2021 Chevy/GMC 1500 4WD Diesel Trail Boss/AT4) (1807H) BDS 4" Lift Kit (2019-2021 Chevy/GMC 1500 4WD Diesel Trail Boss/AT4) (1807H) BDS Suspension DIESEL MODELS ONLY 4" IFS Systems for Chevy Trail Boss/ GMC AT4  These 4" lift kits come complete with everything you need to properly lift your Trail Boss/AT4 and allow clearance for 35-37" tires. The goal with these kits is to build off the factory steering and suspension geometry to offer the optimized strength, safety, and performance you've come to expect from BDS Suspension. While these kits net 4" of lift on a Trail Boss/AT4, ride height is similar to a 6" lift on a standard GM1500 truck. Parts list includes high strength 1/4" steel crossmembers, precision machined ductile iron steering knuckles, heavy duty tie rod ends, multipoint differential drop brackets, front and differential skid plates, performance series upper control arms, top mounted strut spacers, sway bar relocation, brake line relocation, rear block kit and your choice of gas shocks. Kits allow compatibility with more tire/wheel options than other lift kits on the market. These systems are not only built for daily driving, but will handle most any offroad excursion you want to tackle and provide extra ground clearance and heavy duty skid plates. Take your GM truck to the next level with BDS. As with all BDS lift kits, these new 4" lift kits are backed by Factory Protection Plus for piece of mind wherever your adventures may take you. Factory Protection Plus includes BDS's exclusive No Fine Print Warranty, FMVSS No.126 ESC System compatibility and a 5-year, 100,000-mile drivetrain warranty.  Important Kit Notes 1. Requires frame bracket modification2. Will not fit Adaptive Ride Control (ARC) equipped models3. Factory 17" and 18" wheels cannot be reinstalled due to tie rod end interference, stock 20" wheels can be reinstalled.4. 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.5. 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.6. Front skid plate will not work with 2.7L Turbo Engines. Specifications Lift HeightFront (base kit): 4" High Clearance IFS SystemRear (base kit): 4" Block Kit Tire and Wheel Combinations Check instructions for additional tire & wheel fitment combinations37"x12.50 w/20x9/22x9(Chevy) and 5.5" back spacing35"x12.50 w/20x9/22x9(GMC) and 5.5" - 6.25" back spacing34"x12.50 w/17x8/17x9/18x9 and 4.5" back spacing*Trimming may be required* Installation Est. Installation: 8 hoursDifficulty Level (easy 1 - 5 complicated): 4 InstructionsClick Here for PDF 1 of 1 Vehicle Fitment Data Make Model Type Lift Year Range Chevy / GMC 1/2 Ton Truck 4WD Trail Boss / AT4 4" 2019-2021 Base Kit Components These components are subject to change based upon your selections. Qty Part# Description (1) 011518 2019-2021 GM 1500 5in Rear Box Kit (1) 021405 2019-2021 Chevy/GM 4" Strut Spacer Box (1) 021664 2019-2021 GM 1500 Knuckle Box 1of2 w/UCA (1) 021665 2019-2021 GM 1500 Knuckle Box 2of2 w/UCA (1) 021682 2019-2021 GM 1500 6in Front Box Kit 1of2 (1) 021685 2019-2021 GM 1500 6in Diesel Front Box K (2) 85759 BDS NX2 Shock Absorber

BDS 4" Lift Kit (2019-2021 Chevy/GMC 1500 4WD Diesel Trail Boss/AT4) (1807H)

Code: 1807H
$3,112.60
In Stock
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DIESEL MODELS ONLY

4" IFS Systems for Chevy Trail Boss/ GMC AT4

 These 4" lift kits come complete with everything you need to properly lift your Trail Boss/AT4 and allow clearance for 35-37" tires. The goal with these kits is to build off the factory steering and suspension geometry to offer the optimized strength, safety, and performance you've come to expect from BDS Suspension. While these kits net 4" of lift on a Trail Boss/AT4, ride height is similar to a 6" lift on a standard GM1500 truck. Parts list includes high strength 1/4" steel crossmembers, precision machined ductile iron steering knuckles, heavy duty tie rod ends, multipoint differential drop brackets, front and differential skid plates, performance series upper control arms, top mounted strut spacers, sway bar relocation, brake line relocation, rear block kit and your choice of gas shocks. Kits allow compatibility with more tire/wheel options than other lift kits on the market. These systems are not only built for daily driving, but will handle most any offroad excursion you want to tackle and provide extra ground clearance and heavy duty skid plates. Take your GM truck to the next level with BDS. As with all BDS lift kits, these new 4" lift kits are backed by Factory Protection Plus for piece of mind wherever your adventures may take you. Factory Protection Plus includes BDS's exclusive No Fine Print Warranty, FMVSS No.126 ESC System compatibility and a 5-year, 100,000-mile drivetrain warranty. 


Important Kit Notes

1. Requires frame bracket modification
2. Will not fit Adaptive Ride Control (ARC) equipped models
3. Factory 17" and 18" wheels cannot be reinstalled due to tie rod end interference, stock 20" wheels can be reinstalled.
4. 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.
5. 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.
6. Front skid plate will not work with 2.7L Turbo Engines.

Specifications

Lift Height
Front (base kit): 4" High Clearance IFS System
Rear (base kit): 4" Block Kit

Tire and Wheel Combinations
Check instructions for additional tire & wheel fitment combinations
37"x12.50 w/20x9/22x9(Chevy) and 5.5" back spacing
35"x12.50 w/20x9/22x9(GMC) and 5.5" - 6.25" back spacing
34"x12.50 w/17x8/17x9/18x9 and 4.5" back spacing
*Trimming may be required*

Installation

Est. Installation: 8 hours
Difficulty Level (easy 1 - 5 complicated): 4

Instructions
Click Here for PDF 1 of 1

Vehicle Fitment Data

Make Model Type Lift Year Range
Chevy / GMC 1/2 Ton Truck 4WD Trail Boss / AT4 4" 2019-2021

Base Kit Components

These components are subject to change based upon your selections.

Qty Part# Description
(1) 011518 2019-2021 GM 1500 5in Rear Box Kit
(1) 021405 2019-2021 Chevy/GM 4" Strut Spacer Box
(1) 021664 2019-2021 GM 1500 Knuckle Box 1of2 w/UCA
(1) 021665 2019-2021 GM 1500 Knuckle Box 2of2 w/UCA
(1) 021682 2019-2021 GM 1500 6in Front Box Kit 1of2
(1) 021685 2019-2021 GM 1500 6in Diesel Front Box K
(2) 85759 BDS NX2 Shock Absorber

DIESEL MODELS ONLY

4" IFS Systems for Chevy Trail Boss/ GMC AT4

 These 4" lift kits come complete with everything you need to properly lift your Trail Boss/AT4 and allow clearance for 35-37" tires. The goal with these kits is to build off the factory steering and suspension geometry to offer the optimized strength, safety, and performance you've come to expect from BDS Suspension. While these kits net 4" of lift on a Trail Boss/AT4, ride height is similar to a 6" lift on a standard GM1500 truck. Parts list includes high strength 1/4" steel crossmembers, precision machined ductile iron steering knuckles, heavy duty tie rod ends, multipoint differential drop brackets, front and differential skid plates, performance series upper control arms, top mounted strut spacers, sway bar relocation, brake line relocation, rear block kit and your choice of gas shocks. Kits allow compatibility with more tire/wheel options than other lift kits on the market. These systems are not only built for daily driving, but will handle most any offroad excursion you want to tackle and provide extra ground clearance and heavy duty skid plates. Take your GM truck to the next level with BDS. As with all BDS lift kits, these new 4" lift kits are backed by Factory Protection Plus for piece of mind wherever your adventures may take you. Factory Protection Plus includes BDS's exclusive No Fine Print Warranty, FMVSS No.126 ESC System compatibility and a 5-year, 100,000-mile drivetrain warranty. 


Important Kit Notes

1. Requires frame bracket modification
2. Will not fit Adaptive Ride Control (ARC) equipped models
3. Factory 17" and 18" wheels cannot be reinstalled due to tie rod end interference, stock 20" wheels can be reinstalled.
4. 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.
5. 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.
6. Front skid plate will not work with 2.7L Turbo Engines.

Specifications

Lift Height
Front (base kit): 4" High Clearance IFS System
Rear (base kit): 4" Block Kit

Tire and Wheel Combinations
Check instructions for additional tire & wheel fitment combinations
37"x12.50 w/20x9/22x9(Chevy) and 5.5" back spacing
35"x12.50 w/20x9/22x9(GMC) and 5.5" - 6.25" back spacing
34"x12.50 w/17x8/17x9/18x9 and 4.5" back spacing
*Trimming may be required*

Installation

Est. Installation: 8 hours
Difficulty Level (easy 1 - 5 complicated): 4

Instructions
Click Here for PDF 1 of 1

Vehicle Fitment Data

Make Model Type Lift Year Range
Chevy / GMC 1/2 Ton Truck 4WD Trail Boss / AT4 4" 2019-2021

Base Kit Components

These components are subject to change based upon your selections.

Qty Part# Description
(1) 011518 2019-2021 GM 1500 5in Rear Box Kit
(1) 021405 2019-2021 Chevy/GM 4" Strut Spacer Box
(1) 021664 2019-2021 GM 1500 Knuckle Box 1of2 w/UCA
(1) 021665 2019-2021 GM 1500 Knuckle Box 2of2 w/UCA
(1) 021682 2019-2021 GM 1500 6in Front Box Kit 1of2
(1) 021685 2019-2021 GM 1500 6in Diesel Front Box K
(2) 85759 BDS NX2 Shock Absorber

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Markdown and Open Box items are offered at a discount as they have either been overstocked, slightly damaged, and/or returned from a previous customer. Items are sold "as-is." Lift Kits 4 Vets will indicate any damage found during the inspection process. Please note that this does not guarantee that all defects have been identified. Sales for all items in this category are final. No refunds, exchanges, or replacements are permitted. Some manufacturers may continue to warranty such items; however, the purchaser accepts that some manufacturers may not extend warranties to items in this category. Please refer to the individual product manufacturer's warranty page for details.

F.A.Q.
How do I request a return?
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Upon receipt, please inspect all orders for completion, accuracy, and damage. If packaging appears to be damaged, ensure to photograph the damage, as this may be required for a shipping carrier claim.
Use the Contact page, ensuring to include your order number, contact information, and description of the incorrect or damaged part(s). One of our team members will contact you to correct the issue.

What product warranties does Lift Kits 4 Vets offer?
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Estimated order processing times for in-stock items.
To check stock levels, use our Live-Chat feature or Contact page.
 
 Manufacturer Estimated Lead Time
BDS Suspension
1-2 Days
Morimoto 1-2 Days
ReadyLIFT Suspensions 1-7 Days
Rough Country 1-2 Days
Zone Offroad 1-2 Days