BDS 4" Lift Kit (2019-2023 Chevy/GMC 1500 4WD Diesel Trail Boss/AT4) (1807H)

IMPORTANT: ALWAYS READ THE ENTIRE PRODUCT DESCRIPTION, INCLUDING NOTES AND FITMENT INFORMATION, BEFORE MAKING YOUR PURCHASE. FOR THE MOST UP-TO-DATE INFORMATION, REFERENCE THE MANUFACTURER'S PRODUCT PAGE.

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.
7. This kit has not been test fit on Silverado ZR2 or Sierra AT4X models.

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"	2019-2023

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

To check stock levels, use our Live-Chat feature or Contact page. See the Lead Times tab for average order fulfillment times by manufacturer.

Note that some items ship directly from the manufacturer. For these items, the manufacturer may not provide real-time inventory data to Lift Kits 4 Vets and backorders are possible. If an item is unavailable, Lift Kits 4 Vets will contact the buyer with an estimated ship date. In the event of excessive manufacturer backorders or delays, Lift Kits 4 Vets may opt to cancel the order and provide a full refund.

Shipping

Lift Kits 4 Vets provides shipping within the contiguous 48 states only. For orders outside of this area, please use the Contact page prior to placing your order. Items shipped by ground or LTL generally arrive within 1-5 days from date of shipment. Lift Kits 4 Vets is not responsible for carrier shipping delays.

Items in their original condition may be returned within 30 days from the date of purchase for a full refund. Items may NOT be returned once packaging has been opened or the item has been installed, otherwise used, or damaged. The buyer is responsible for all return shipping charges. Returns and refunds may be requested through the Contact page.

Note: Do NOT ship items back until you have received a return authorization, as items may be returned to a facility other than their point of origin. Refunds will generally be processed within 48 business hours of receipt at our warehouse in order to allow for inspection and processing.

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.

How do I request a return?
Use the Contact page, ensuring to include your order number, contact information, items for return, and reason for return. One of our team members will contact you with return shipping details and instructions. Additional information and documentation may be required.
Note: Some items must be returned directly to the manufacturer. Please do not ship items to Lift Kits 4 Vets prior to return authorization and return instructions.

How do I request a replacement for a missing or damaged part?
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?
Product warranties are solely offered by product manufacturers. Please refer to the product manufacturer's warranty statement. In the event of a warranty claim, Lift Kits 4 Vets is available to assist with the manufacturer's required documentation. Please use the Contact page if assistance is required.