Cognito 10" Performance Lift Kit with Fox 2.0 PSRR | 2020-2025 Silverado/Sierra 2500HD/3500HD

The Obsidian Vision

Ten inches of front lift and eight inches of rear lift on a 2020–2025 Silverado or Sierra 2500HD/3500HD is a complete suspension system transformation — one that demands engineering precision at every component interface and a CV front driveline upgrade that is not optional for 4WD trucks. The Cognito 10-Inch Performance Lift Kit with Fox 2.0 Performance Series Remote Reservoir Shocks delivers that transformation as a complete, no-guesswork system engineered specifically for the T1 GMT1XX heavy-duty platform: SM Series Ball Joint Upper Control Arms, SM Series Compression Struts, the patented Cognito Pitman and Idler Arm Support Kit, Fox 2.0 PSRR front shocks, Deaver replacement leaf packs, a 4-inch block and U-bolt kit, and stainless steel extended brake lines — every component engineered, manufactured, and assembled in the USA to work as a unified system. At 10 inches of front lift and 8 inches of rear lift, this is the build that defines what a properly engineered T1 heavy-duty platform is capable of — and it begins with the CV driveline upgrade that makes it safe to operate in 4WD.

Concierge Fitment Guarantee

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

Engineering Breakdown

• Lifts the front of the 2020–2025 Silverado/Sierra 2500HD/3500HD 10 inches via the Cognito SM Series Ball Joint Upper Control Arm Kit and SM Series Compression Struts, which work in concert to correct the ball joint and CV joint angles at extreme lift height — maintaining adequate front droop travel, corrected CV joint geometry, and long-term front suspension component integrity across the full 10-inch lift range.
• Eliminates the pitman and idler arm center-link movement that causes steering play, road wander, and accelerated steering component wear at extreme lift heights through the patented Cognito Pitman and Idler Arm Support Kit — the engineering solution to the inherent wear problem that has plagued GM truck steering systems for decades and is amplified at 10 inches of front lift on the T1 platform.
• Levels the truck front to rear with 8 inches of rear lift via Deaver replacement leaf packs (4 inches over stock) combined with the Cognito 4-inch block and U-bolt kit, replacing the OEM rear spring with a high-quality spring steel, higher-leaf-count progressive pack that delivers a more compliant ride while maintaining the load capacity required for towing and payload at the elevated ride height.

The Cognito SM Series Ball Joint Upper Control Arms feature boxed sheet-metal construction, welded seams, and semi-gloss black powder coat, with pre-installed maintenance-free ball joints and pivot bushings included. The SM Series Compression Struts are an additional geometry correction component specific to the T1 platform's front suspension architecture, required at 10 inches of front lift to maintain correct CV joint operating angles that the upper control arm alone cannot fully address at this lift height. The Fox 2.0 Performance Series Remote Reservoir shocks feature an impact-extruded aluminum body for increased cooling capacity, rust-resistant construction, and factory-tuned precision valving that eliminates oil aeration for consistent damping performance across the full 10-inch front lift travel range. The Deaver leaf pack is a complete OEM spring replacement arched for 4 inches over stock rear lift height, manufactured from high-quality spring steel with a higher leaf count and thinner leaf material for a more compliant initial rate that firms progressively under load. The Cognito 4-inch block and U-bolt kit adds the remaining 4 inches of rear lift, with powder-coated semi-gloss black steel blocks and heavy-duty zinc plated U-bolts completing the 8-inch total rear lift system. Stainless steel extended brake lines are included to safely accommodate the increased suspension travel at 10 inches of front lift. All Cognito components are engineered, manufactured, and assembled in the USA. At 706 lbs, this kit ships via LTL freight carrier on multiple pallets with residential delivery included.

Audit Table

Verified Fitment (OFAS Standard)

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

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

✅ CONFIRMED — GMC Sierra 2500HD:
2020–2022 GMC Sierra 2500HD Base 2WD/4WD
2020–2025 GMC Sierra 2500HD SLE, SLT, AT4, Denali 2WD/4WD
2023–2025 GMC Sierra 2500HD Pro 2WD/4WD
2024–2025 GMC Sierra 2500HD Denali Ultimate 2WD/4WD

✅ CONFIRMED — GMC Sierra 3500HD:
2020–2022 GMC Sierra 3500HD Base 2WD/4WD
2020–2025 GMC Sierra 3500HD SLE, SLT, AT4, Denali 2WD/4WD SRW & DRW
2023–2025 GMC Sierra 3500HD Pro 2WD/4WD SRW & DRW
2024–2025 GMC Sierra 3500HD Denali Ultimate 2WD/4WD SRW & DRW

❌ REQUIREMENTS & CRITICAL NOTICES:
⚠️ CV FRONT DRIVELINE REQUIRED — 4WD TRUCKS: The stock front driveline is NOT supported with this kit on 4WD trucks. A CV front driveline upgrade must be added before operating the vehicle in 4WD. Failure to install a CV front driveline before engaging 4WD will result in driveline damage. Add a compatible CV front driveline upgrade to your order — contact the OFAS team to confirm the correct part for your specific truck.
Requires front alignment immediately post-installation — at 10 inches of front lift, caster and camber correction is critical before any driving. Do not operate the vehicle before alignment is completed.
Requires driveline u-joint angle verification post-installation — at 10 inches of front lift and 8 inches of rear lift, driveline operating angles must be verified and corrected before towing at rated capacity.
Requires ADAS recalibration if equipped with forward collision alert, lane departure warning, adaptive cruise control, or Super Cruise.
Requires professional brake system inspection post-installation to verify stainless brake line routing, clearance, and connection integrity before driving.
Requires rear U-bolt re-torque after the first 500 miles of use.
Shipping Notice: At 706 lbs, this kit ships via LTL freight carrier on multiple pallets. Residential delivery is included.

Installation & Technical Notes

Estimated Install Time: 18-Hour DIY Install — this is a complete front and rear suspension system replacement requiring a 2-post or 4-post lift, comprehensive hand tools, torque wrench, spring compressor, and alignment equipment or an immediate post-installation alignment appointment.
CV Driveline: Install the CV front driveline upgrade before engaging 4WD under any circumstances. The stock front driveline cannot safely operate at the CV joint angles generated by 10 inches of front lift on the T1 platform.
Alignment Required: Yes — professional front alignment is mandatory immediately after installation. At 10 inches of front lift, caster and camber deviation from factory specification is significant and must be corrected before any driving.
Torque Specifications: Refer to Cognito's included instruction sheet for all component torque values — torque all fasteners with the suspension at ride height under load. Re-torque all critical fasteners after the first 500 miles.
Brake Line Routing: Route and secure stainless brake lines per Cognito's included instructions — verify clearance to all suspension components through the full travel arc before driving.
Driveline Angles: At 10 inches of front lift and 8 inches of rear lift, verify front and rear driveshaft u-joint operating angles are within GM's specification. The CV front driveline upgrade addresses the front; verify rear driveshaft angles independently.
Shipping Notice: At 706 lbs on multiple pallets, coordinate delivery logistics before ordering. Residential delivery is included but requires a clear delivery path and personnel to assist with unloading.

Wheel & Tire Fitment

At 10 inches of front lift and 8 inches of rear lift on the 2020–2025 Silverado/Sierra 2500HD/3500HD platform, tire sizing is determined by fender clearance, inner fender modification, and wheel backspacing. Contact the OFAS team for specific tire and wheel recommendations for your build — at this lift height, 37-inch to 40-inch tires are common, and wheel backspacing, offset, and inner fender clearance must all be verified for your specific cab, bed, and fender configuration before finalizing wheel and tire selection.

Our team is standing by to confirm your CV front driveline selection, verify your drivetrain configuration, ADAS equipment, and tire and wheel goals for a 10-inch build on your specific truck. Purchase with confidence; we review every build.