Deaver K97 4" Leaf Spring Pack | 2011-2025 Silverado/Sierra 2500HD/3500HD

The Obsidian Vision

Four inches of rear lift on a 2011–2025 Silverado or Sierra 2500HD/3500HD can be achieved with a lift block — but a lift block introduces wheel hop and axle wrap under acceleration that a complete leaf spring replacement eliminates by design. The Deaver K97 4-Inch Leaf Spring Pack is a complete OEM spring replacement, arched for 4 inches of rear lift over stock height, built from high-quality spring steel with a higher leaf count and thinner individual leaf material for a more compliant, progressive ride. Military wrap at the front eyelet, diamond-cut inner leaf ends, and anti-friction inserts between the leaves complete a spring pack that is engineered for durability, reduced noise, and the ride quality that a properly designed multi-leaf progressive pack delivers over a conventional two-stage or block-and-U-bolt approach. Bolt-in, no cutting or welding. Made in the USA.

Concierge Fitment Guarantee

Every order is manually reviewed by our technicians to ensure 100% compatibility with your build before we ship.

Engineering Breakdown

• Delivers 4 inches of rear lift via a complete OEM spring replacement that is arched to the target ride height — eliminating the wheel hop and axle wrap that lift blocks introduce by replacing the spring's arc rather than adding a rigid spacer between the axle and the spring pack, which allows the spring to control axle movement through its designed deflection range rather than transmitting acceleration torque directly to the frame through a rigid block.
• Achieves excellent ride quality through a higher leaf count with thinner individual leaf material, producing a more compliant and progressive spring rate curve than a conventional low-leaf-count spring — the same progressive rate engineering that allows the pack to ride softly under light loads and firm progressively under heavier loads, maintaining the ride quality that a heavy-duty truck at this price point should deliver across the full load range.
• Incorporates military wrap at the front spring eyelet for enhanced eye durability and fatigue resistance, diamond-cut inner leaf ends to eliminate the shear stress concentration at the inner leaf tips that causes leaf breakage, and anti-friction inserts between the leaves to prevent metal-to-metal contact and the squeaking and harshness that inter-leaf friction generates under load cycling.

The Deaver K97 spring pack is a complete replacement for the OEM rear leaf spring assembly on the 2011–2025 Silverado/Sierra 2500HD/3500HD platform — both K2 (2011–2019) and T1 (2020–2025) generations. The spring is arched to deliver 4 inches of rear lift over the factory ride height without requiring a lift block, eliminating the axle wrap and wheel hop that a block-and-U-bolt rear lift introduces under acceleration. The higher leaf count allows each individual leaf to be thinner, reducing the stiffness contribution of each leaf and producing the progressive rate curve that a thick, low-leaf-count spring cannot achieve. Military wrapping at the front eyelet distributes the eye load across a larger surface area, preventing the fatigue cracking that develops at unwrapped eyes under sustained cyclic loading. Diamond-cut inner leaf ends eliminate the stress concentration at the inner leaf tip. Anti-friction inserts prevent inter-leaf noise and harshness. The pack is secured with the included center pin and retaining clips. Bolt-in installation, no cutting or welding required. Made in the USA. At 275 lbs, this kit ships via LTL freight carrier with residential delivery included.

Audit Table

Verified Fitment (OFAS Standard)

✅ CONFIRMED — Chevrolet Silverado 2500HD:
2011–2025 Chevrolet Silverado 2500HD WT, LT, LTZ 2WD/4WD
2015–2025 Chevrolet Silverado 2500HD High Country 2WD/4WD
2020–2025 Chevrolet Silverado 2500HD Base, Custom 2WD/4WD

✅ CONFIRMED — Chevrolet Silverado 3500HD:
2011–2025 Chevrolet Silverado 3500HD WT, LT, LTZ 2WD/4WD SRW & DRW
2015–2025 Chevrolet Silverado 3500HD High Country 2WD/4WD SRW & DRW
2020–2025 Chevrolet Silverado 3500HD Base 2WD/4WD SRW & DRW

✅ CONFIRMED — GMC Sierra 2500HD:
2011–2014 GMC Sierra 2500HD WT 2WD/4WD
2011–2025 GMC Sierra 2500HD SLE, SLT, Denali 2WD/4WD
2020–2025 GMC Sierra 2500HD AT4, Base 2WD/4WD
2023–2025 GMC Sierra 2500HD Pro 2WD/4WD
2025 GMC Sierra 2500HD Denali Ultimate 2WD/4WD

✅ CONFIRMED — GMC Sierra 3500HD:
2011–2014 GMC Sierra 3500HD WT 2WD/4WD SRW & DRW
2011–2025 GMC Sierra 3500HD SLE, SLT, Denali 2WD/4WD SRW & DRW
2020–2025 GMC Sierra 3500HD AT4, Base 2WD/4WD SRW & DRW
2023–2025 GMC Sierra 3500HD Pro 2WD/4WD SRW & DRW
2025 GMC Sierra 3500HD Denali Ultimate 2WD/4WD SRW & DRW

❌ REQUIREMENTS:
Requires rear pinion angle verification post-installation — at 4 inches of rear lift, verify driveline u-joint operating angles are within GM's specification before towing at rated capacity. A pinion angle shim or adjustable upper control arm may be required depending on the installed front lift height and driveline configuration.
Requires rear alignment verification post-installation to confirm axle centering and tracking geometry at the new ride height.
Re-torque center pin and U-bolt hardware after the first 500 miles of use.
Shipping Notice: At 275 lbs, this kit ships via LTL freight carrier. Residential delivery is included. A delivery appointment will be scheduled by the carrier.

Installation & Technical Notes

Estimated Install Time: 1.5–2 Hours DIY Install (with a 2-post lift or floor jack and jack stands, basic hand tools, and torque wrench — alignment verification recommended after installation)
Bolt-In Installation: The Deaver K97 is a direct bolt-in replacement for the OEM rear leaf spring assembly — no cutting, drilling, or welding required. Remove the factory spring pack and install the K97 at the same mounting points using the included center pin and retaining clips.
Pinion Angle: After installation, verify the rear differential pinion angle is within GM's specification for the installed front and rear lift height combination. A pinion angle shim may be required at 4 inches of rear lift depending on the front lift height installed.
Torque Specifications: Refer to the included instruction sheet for all center pin, U-bolt, and spring eye bolt torque values — torque with the suspension at ride height under load. Re-torque after the first 500 miles.
Shipping Notice: At 275 lbs, this kit ships via LTL freight carrier. Residential delivery is included. A delivery appointment will be scheduled by the carrier.

Wheel & Tire Fitment

The Deaver K97 4-Inch Leaf Spring Pack provides 4 inches of rear lift on the 2011–2025 Silverado/Sierra 2500HD/3500HD platform. Rear lift at this increment is typically used in conjunction with a front lift system to achieve a level or slightly raked stance. Contact the OFAS team to verify tire and wheel fitment for your specific front and rear lift combination and desired tire size.

Our team is standing by to verify your specific front lift height, pinion angle requirements, and tire and wheel fitment for your Deaver K97 build. Purchase with confidence; we review every build.