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ReadyLift

ReadyLIFT 4" Big Lift Kit - 2019-2024 Silverado Trail Boss / Sierra AT4 1500

ReadyLIFT 4" Big Lift Kit - 2019-2024 Silverado Trail Boss / Sierra AT4 1500

$2,419.95
$2,419.95
Shipping calculated at checkout.

✔ 30-day returns on unused items in original packaging. Details
✔ Manufacturer warranty: we help with claims
✔ Fitment question? Email [email protected]

Shipping: Ships from the manufacturer or distributor. Processing times vary by manufacturer; we'll email tracking as soon as your order ships.

Free shipping on orders $100+ to the contiguous U.S. (flat $12.99 under $100)

The ReadyLIFT 4" Big Lift Kit (part 44-39420) is engineered for 2019-2024 Chevy Silverado 1500 Trail Boss and GMC Sierra 1500 AT4 trucks. Boxed steel cross members, a full-width 3/16" plate steel skid plate and heavy-duty diff drop brackets deliver ride quality and handling that ReadyLIFT says beats stock.

Part number: ReadyLIFT 44-39420

Key features

  • 3/16" plate steel boxed front/rear cross members and full-width front skid plate
  • 1/4" boxed plate steel differential drop brackets with a double gusset and boxed center rib
  • Angled and offset heavy-duty top mount strut extensions keep the factory struts working at the right angle
  • Lower strut pre-load spacer adds a slight increase in spring rate for larger wheels and tires
  • Cast iron lift knuckles retain factory-quality geometry
  • Fabricated steel rear lift blocks with integrated bump stop landings
  • Includes ReadyGuard Powertrain Warranty

What's included

  • Heavy-duty front and rear cross members and skid plate
  • Heavy-duty top mount strut extensions and rear shock extensions
  • Sway bar drop brackets
  • Heavy-duty fabricated steel rear lift blocks with bump stop landings
  • Heavy-duty cast iron lift knuckles
  • All necessary hardware and instructions

Fitment

  • 2019-2024 Chevy Silverado 1500 Trail Boss
  • 2019-2024 GMC Sierra 1500 AT4
  • Will not fit late-model 2024 or 2025 trucks with round U-bolts; ReadyLIFT U-bolt part 67-35150UB allows fitment on 2025 applications
  • Not compatible with rear mono-leaf springs
  • Not for diesel engine applications (no oil line relocation bracket included)
  • Single cab configuration has not been validated for fitment and drivability by ReadyLIFT
  • Use of the Auto 4 Hi feature is not recommended

Tire fitment

  • Recommended max with no trimming: 35x12.50 on a 20x9 wheel with 0 offset
  • Max with trimming: 35x12.50 or 325/60R20 on a 20x10 wheel with -18 offset
  • 18" wheels: only -12 mm offset works; an 18x9 with 0 mm offset or higher does not
  • Trimming for larger than recommended wheels/tires includes the front valance, front and rear felt liner edges, and the front wheel well edge mud flap
  • ReadyLIFT bases its wheel and tire recommendations on specific wheel and tire brands, and sizes vary by manufacturer, so test-fit every wheel and tire combination before installation.

Install notes

  • Estimated installation time: 10 hours +/- 1 hour (excludes alignment and wheel/tire assembly).
  • Read the instructions completely before starting. ReadyLIFT recommends installation by a certified mechanic.

Questions about fitment? Email [email protected] with your year, make, model, and trim before ordering.

ReadyLIFT 4" Big Lift Kit - 2019-2024 Silverado Trail Boss / Sierra AT4 1500

$2,419.95

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At Venture Overland Company, we provide a carefully curated selection of top-tier brands and expert guidance to help you enhance your vehicle’s performance. Our community-driven approach ensures every product integrates seamlessly into your adventures, whether upgrading your Jeep, Toyota, or Ford. With our focus on quality, versatility, and outstanding service, we’re more than a store—we’re your partner in every off-road experience.

Questions?

Quick answers about returns, shipping, warranty and support for orders from Venture Overland Company.

Can I return a product if I'm not satisfied?

Yes. Most new, unused items in their original packaging can be returned within 30 days of delivery. Email us first for return authorization. See our Returns policy.

How can I contact customer service?

We provide support by email only: [email protected]. Include your order number or your vehicle year, make and model.

How long does it take to process and ship my order?

Most products ship directly from the manufacturer or distributor, and processing times vary by manufacturer. We'll email your tracking number as soon as your order ships. See our Shipping policy.

Are your products covered by a warranty?

Products are covered by their manufacturer's warranty. Email us with your order number and photos of the issue and we'll help you with the claim.

Can I cancel or modify my order after it’s been placed?

Email us as soon as possible. We can change or cancel an order only before it has been sent to the warehouse.

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