The ReadyLIFT Tubular A-Arm Kit for 7"-8" Lifts replaces the factory upper arms on a truck already running a big lift. They are sold as a pair with heavy-duty ball joints installed. ReadyLIFT kit 47-3440 is engineered for the 2011-2019 Chevrolet Silverado 2500 HD and Silverado 3500 HD and GMC Sierra 2500 HD and Sierra 3500 HD.
Wheels, tires, alignment, headlamp aiming, ADAS recalibration and any trimming labor are not included.
Features
Built for lifted trucks
The arms are designed for trucks running ReadyLIFT's matching big lift, where factory arms run out of angle.
Corrected ball joint angle
A modified cup angle places the ball joint where a lifted suspension needs it, which helps the truck reach proper alignment.
Heavy-duty tubular steel
Tubular steel construction is stronger than the stock arms it replaces.
Sold as a pair
Both upper arms ship together with heavy-duty ball joints.
Direct bolt-on fit
ReadyLIFT describes these arms as a direct-fit, bolt-on replacement for the listed trucks.
Fitment & Compatibility
Fit guidance: Fits: 2011-2019 Chevrolet Silverado 2500 HD/Silverado 3500 HD & GMC Sierra 2500 HD/Sierra 3500 HD. Check your vehicle's trim, drivetrain and factory suspension against these notes before ordering.
Specifications
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Brand: ReadyLIFT
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Warranty: ReadyLIFT No Hassle warranty, original purchaser; wear parts incl. shocks up to 1 year
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Install time (ReadyLIFT estimate): about 1.5 hours (give or take 0.5), alignment and wheel mounting extra
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Shipping weight: 14 lb
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Part number: 47-3440
Installation
Type: full suspension lift · Install: involved, per-vehicle install sheet · Afterward: alignment, headlamp aim, ADAS check
This kit installs using the steps in ReadyLIFT's instructions for this truck, including any trimming the instructions call for. Plan on a wheel alignment after installation and have headlamp aim checked. Vehicles with camera, radar or sonar driver-assistance systems need those systems checked and recalibrated, which can require dealer tools. ReadyLIFT recommends installation by a certified mechanic and says to read the full instructions before starting. Tire sizes are ReadyLIFT guidance based on specific wheel and tire brands, so test fit every combination. Larger E-rated tires have stiffer sidewalls than stock C-rated tires and can make the ride feel firmer.
ReadyLIFT estimates about 1.5 hours for this kit, give or take 0.5 hours, not counting the alignment or mounting wheels and tires.
Resources
An installation guide for this part number is not available to download. Our team can answer installation questions before you order; contact us with the part number.
Warranty, Shipping & Returns
Warranty. ReadyLIFT backs this product with its No Hassle warranty for the original purchaser: if a part breaks or arrives defective, ReadyLIFT ships a replacement, and a claim starts with a call to 800-549-4620. Wear items such as the included shocks, ball joints and bushings are covered for up to one year. Damage caused by off-road abuse voids coverage. Discontinued, clearance and outlet items are excluded, as are labor, installation charges and consequential vehicle damage. Shipping. The carrier and ship method are set by the size and weight of the cartons when the order is placed; larger kits ship by freight. Inspect on delivery. Check every box and part against the kit component list when it arrives, and report any shortage or shipping damage before installation begins.
Returns. Unused items in their original packaging can be returned within 30 days of delivery. If an item arrives damaged, defective or wrong, return shipping is on us. See our Returns & Refunds Policy, or email support@prestigetruck.com with any question.
About ReadyLIFT
ReadyLIFT Suspension started in 2006 with one goal: give truck and SUV owners more tire clearance and a better stance while keeping the ride and handling their vehicle had from the factory.
What began as a practical option to traditional big lifts now spans front leveling kits, SST mild lifts, full big lift systems, premium coilover packages, upper control arms and Falcon shocks for popular trucks and SUVs.
Wheel Pros bought ReadyLIFT in 2018, and in August 2026 the brand joined Bestop Premium Accessories Group, which plans continued investment in engineering, product development, manufacturing and customer support.
