ReadyLIFT 6" (6-inch + Factory 2-inch) Big Lift Kit With 2.1 Falcon Shocks - 2019-2024 1500 Trail Boss / AT4
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Warranty Information
Vendor warranty summary
ReadyLIFT Warranty
At a glance: Defective parts replaced with no stated time limit; wear parts up to 1 year
This is ReadyLIFT's warranty, not an NVMOS policy. We've summarized it in plain English to save you a search. The manufacturer's official terms always govern and can change without notice. Last reviewed on nvmos.com: October 4, 2026.
Coverage by product
| Product or component | Coverage |
|---|---|
| Lift and leveling kit components | Lifetime replacement for defects (original buyer) |
| Wear parts: shocks, ball joints, heim joints, bushings, steering extensions | Up to 1 year |
| Discontinued, clearance or outlet products | Not covered |
- Original purchaser only — coverage does not transfer if you sell it.
What's covered
- Missing or defective components: if a part breaks, ReadyLIFT sends a new one
- ReadyLIFT may ask for the old part back at its own cost for analysis, without holding up the replacement
- Jeep SST and Terrain Flex kits are covered for recreational off-road use
What's not covered
- Off-road abuse (except Jeep SST and Terrain Flex kits)
- Discontinued, clearance and outlet items
- Labor, installation, surcharges and fees
- Resulting damage to the vehicle
How to make a ReadyLIFT warranty claim
- Call ReadyLIFT customer service to start a claim (7:30am-4pm MST)
- ReadyLIFT ships the replacement part, quickly where possible
ReadyLIFT contact: Phone: 800-549-4620 (toll free); 702-410-2300 · Claim page / support
Bought it from NVMOS? Start with us.
Have your order number and a few photos of the issue ready, then call real humans at (920) 249-7744 or send us a message. We'll tell you whether the claim goes through us or straight to ReadyLIFT, and help it along either way.
Shop ReadyLIFT at NVMOS
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See all ReadyLIFT products, lead times and FAQs →
Disclaimer: The information on this page describes ReadyLIFT's own warranty policy. It is not a warranty offered by NVMOS (No Visible Means of Support LLC). Manufacturers update their terms at any time; we review these pages periodically, but the manufacturer's current official policy is the one that applies to your claim. Source: ReadyLIFT official warranty information. Last updated on nvmos.com: October 4, 2026. See our return policy for NVMOS's own terms.
About the brand
ReadyLIFT is an Ogden, Utah suspension brand built around more tire clearance with close-to-factory ride. NVMOS carries ReadyLIFT leveling kits, SST mid-lifts, Big Lift kits, rear blocks, control arms and wheel spacers for Ford, GM, Ram, Toyota and Jeep trucks.
Based in: Ogden, Utah · Founded: 2006 · Lead time: In-stock ships in 24–48 hrs
Shop all 551 ReadyLIFTWarrantyAll brands
Warranty terms are set by ReadyLIFT, not NVMOS, and can change. Bought from us? Call (920) 249-7744 and we'll handle the claim with the brand.
ReadyLIFT 6" Big Lift Kit With Falcon 2.1 Shocks for 2019-2024 Silverado Trail Boss and Sierra AT4 1500
The ReadyLIFT 44-39621 is a 6" plus factory 2" big lift kit for 2019-2024 Chevy Silverado Trail Boss and GMC Sierra AT4 1500 trucks. It allows tires up to 37x12.50 on 9" wheels with 0 offset, with no trimming. Browse more full-size truck parts.
The proprietary lower strut clamshell keeps factory geometry and the factory strut. Tube steel upper control arms have maintenance-free bushings and 1-ton ball joints. Cross members and skid plate use 3/16" plate steel, and the 5" rear blocks add an add-a-leaf for another 1.5". Falcon 2.1 extended-length rear shocks are included. See our shock absorbers too.
| Spec | Detail |
|---|---|
| Lift | 6" plus the factory 2" |
| Recommended max tire, no trimming | 37x12.50 on 20x9, 0 offset |
| Rear shocks | Falcon 2.1 monotube extended length |
| Rear blocks | 5" fabricated steel with add-a-leaf |
| SKU | 44-39621 |
- Heavy-duty front and rear cross members and skid plate
- Top mount strut extensions and rear shock extensions
- Sway bar drop brackets
- 5" fabricated steel rear lift blocks with bump stop landings
- Cast iron lift knuckles
- Rear add-a-leaf
- Hardware and instructions
2019-2024 Chevy Silverado Trail Boss and GMC Sierra AT4 1500 4WD. Not compatible with rear mono-leaf springs or diesel engines. Single cab fitment has not been validated. Will not fit late model 2024 or 2025 trucks with round U-bolts unless you use U-bolt 67-35150UB.
Install guides & documents
Complete your build
The pieces owners run with this one — matched to your build and to each other. Do the whole truck in one order instead of three.
$2,699.95
$370.00
$4,999.95
$189.95
$19.99
ReadyLIFT 6" (6-inch + Factory 2-inch) Big Lift Kit With 2.1 Falcon Shocks FAQs
What is the largest tire without trimming?
37x12.50 on a 20x9 wheel with 0 offset. A -18 offset requires minor trimming.
Does it work with diesel trucks?
No. There is no oil line relocation bracket, so it is not for diesel.
Do I need to check my rear springs?
Yes. It is not compatible with rear mono-leaf springs.
What U-bolts does a late-model truck need?
Trucks with round U-bolts can use U-bolt part 67-35150UB.
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