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3252 W Van Buren st. Phoenix, AZ 85009
3252 W Van Buren st. Phoenix, AZ 85009
6" ReadyLift Lift Kit | 2019-2024 AT4 1500 & Chevy Trailboss 1500 | Big Lift Kit

6" ReadyLift Lift Kit | 2019-2024 AT4 1500 & Chevy Trailboss 1500 | Big Lift Kit

by Cosmos Truck Accessories
$2,799.95 - $2,799.95
$2,799.95
$2,799.95 - $2,799.95
$2,799.95

ReadyLIFT 6” Big Lift Kit with Falcon 1.1 Shocks

For 2019–2024 Chevy Silverado & GMC Sierra 1500 4WD (with 2” Factory Lift)
Not compatible with diesel models, mono-leaf rear springs, or late-model 2024–2025 trucks with round U-bolts

Redefine Your Ride. Ready for Bigger Tires, Better Performance, and Rugged Looks.

Elevate your Silverado or Sierra 1500 with ReadyLIFT's most advanced 6” lift kit—engineered specifically for GM 1500 trucks equipped with a 2” factory lift. This system combines aggressive stance, increased ground clearance, and full suspension optimization, all while maintaining factory ride quality and improving off-road capability.

🔧 Engineered to Excel On and Off the Road

  • Maintains factory ride and handling characteristics

  • Clearance for up to 37x12.50 tires on 9” wide wheels with 0 offset and no trimming

    • Minor trimming required with -18 offset wheels

  • Proprietary lower strut clamshell design preserves OE geometry and uses the factory strut

  • Angled and offset upper strut spacers realign geometry to minimize wear

  • Lower preload strut spacer enhances spring rate to better handle larger wheel/tire combos

🛠️ High-Strength Components for Serious Use

  • Boxed steel front and rear crossmembers for unmatched durability and precision fit

  • 3/16" thick front skid plate spans full width for underbody protection

  • 1/4" boxed steel differential drop brackets include a gusseted, ribbed design to resist torsional twist

  • Heavy-duty upper control arms with 1-ton ball joints and maintenance-free pivot bushings

  • Fabricated 5” rear lift blocks with integrated bump stop landings and offset center pin

  • Add-a-leaf included in rear for an additional 1.5” lift and improved load handling

  • Premium Falcon 1.1 Monotube extended-length rear shocks for enhanced control and stability

⚙️ Fitment & Compatibility Notes

  • 🚫 Not compatible with diesel engines

  • 🚫 Not for use with rear mono-leaf spring trucks (Click here to determine if your vehicle has mono-leaf springs)

  • 🚫 Not for 2024+ models equipped with round U-bolts
    ✅ Use U-bolt part #67-35150UB for compatibility with 2025 models

  • 🚫 Auto 4 Hi function is not recommended

  • 🚫 Single cab configuration has not been validated for drivability and fitment

  • ✅ Fits only GM 1500 4WD trucks with factory 2” front lift

🔩 Why Choose ReadyLIFT?

  • Designed, engineered, and tested in the USA

  • Backed by ReadyGuard Powertrain Warranty

  • Ride quality proven with thousands of miles of on- and off-road testing

  • No cutting required to struts, preserving OE components where possible

  • One of the few kits on the market that rides better than stock

🛞 Tire & Wheel Fitment

  • Up to 37x12.50 tires on 9” wide wheels w/ 0 offset (no trimming required)

  • Minor trimming required with -18 offset wheels

  • Not compatible with factory wheels

  • 20” or larger aftermarket wheels required

  • All wheels must have 4.5” backspacing

  • Please test fit all wheels prior to tire mounting to confirm brake caliper and knuckle clearance

  • Some setups may require a .25" wheel spacer (#1065) for proper clearance
Fitment