Cognito 6" Elite Lift Kit with Fox 2.5 Elite Shocks | 2019-2025 Silverado/Sierra 1500

The Obsidian Vision

Six inches of front lift and four inches of rear lift on a 2019–2025 Silverado or Sierra 1500 is the build that clears 35x12.5-inch tires on a 10-inch wide wheel, levels the truck front to rear, and delivers the Fox 2.5" Performance Elite Series ride quality that defines what a properly engineered T1 1500 lift system feels like at this lift height. The Cognito 6-Inch Elite Lift Kit pairs the Fox 2.5 Elite's remote reservoir damping precision with the Cognito SM Series Ball Joint Upper Control Arm Kit's corrected geometry, a Deaver 2-inch mini pack, and a 2-inch block and U-bolt kit in a complete, no-guesswork system engineered and assembled in the USA. Before ordering, four requirements must be confirmed: 4WD trucks require a CV front driveline upgrade for operation above 20mph in 4WD; Denali models require bypassing the ARC Adaptive Ride Control system; 2025 model year trucks require the Leaf Spring Top Plate Conversion kit (sold separately); and this kit is not compatible with trucks equipped with a composite mono-leaf rear spring. With those prerequisites addressed, this is the 35-inch T1 1500 build done right.

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 2019–2025 Silverado/Sierra 1500 6 inches via the Cognito SM Series Ball Joint Upper Control Arm Kit, which corrects the ball joint angle at the elevated ride height, maintains adequate droop travel for superior ride quality, and provides the corrected CV joint geometry required to run 35-inch tires without accelerating ball joint, tie rod, and CV axle boot wear.
• Delivers elite-tier front damping through the Fox 2.5" Performance Elite Series remote reservoir shocks, which use a 2.5-inch shock body and remote reservoir to maintain consistent oil volume and temperature across the full 6-inch front lift travel range — preventing the fade and harshness that develop in non-reservoir shocks under sustained off-road and high-speed use at this lift height.
• Levels the truck front to rear with 4 inches of rear lift via the Deaver 2-inch progressive mini pack combined with the Cognito 2-inch block and U-bolt kit — the mini pack improves rear ride quality by replacing the harsh factory overload spring rate with a progressive rate, while the block and U-bolt kit provides the additional lift increment required to achieve a level front-to-rear stance at 6 inches of front lift.

The Cognito SM Series Ball Joint Upper Control Arms feature boxed sheet-metal construction, CNC robot-welded seams, and semi-gloss black powder coat, with ball joints, new crush sleeves, and polyurethane bushings included. The Fox 2.5" Performance Elite Series shocks are the top-tier Fox remote reservoir shock for this application — the 2.5-inch body diameter provides increased oil volume relative to the Fox 2.0 PSRR, and the remote reservoir maintains a constant oil supply to the piston, preventing cavitation and aeration that cause fade during sustained off-road or high-speed use at 6 inches of front lift. The Deaver 2-inch mini pack fastens to the stock spring pack with new center pins and delivers a progressive spring rate that rides better than the factory overload across the full load range. The 2-inch block and U-bolt kit adds the remaining rear lift increment with powder-coated steel blocks and heavy-duty zinc plated U-bolts. All Cognito components are engineered, manufactured, and assembled in the USA. At 460 lbs, this kit ships via LTL freight carrier with residential delivery included.

Audit Table

Verified Fitment (OFAS Standard)

✅ CONFIRMED — Chevrolet Silverado 1500:
2019–2025 Chevrolet Silverado 1500 Base, Custom, Custom Trail Boss, WT, RST, LT, LT Trail Boss, LTZ, High Country 2WD/4WD
2022–2025 Chevrolet Silverado 1500 ZR2 4WD

✅ CONFIRMED — GMC Sierra 1500:
2019–2025 GMC Sierra 1500 Base, SLE, SLT, Elevation, AT4, Denali 2WD/4WD
2022–2025 GMC Sierra 1500 AT4X, Denali Ultimate 2WD/4WD
2022–2025 GMC Sierra 1500 Pro 2WD/4WD

❌ REQUIREMENTS & CRITICAL NOTICES:
⚠️ COMPOSITE MONO-LEAF REAR SPRING INCOMPATIBILITY: This kit is NOT compatible with trucks equipped with a composite mono-leaf rear spring. Verify your rear spring configuration before ordering — if your truck has a composite mono-leaf rear spring, this kit cannot be installed without replacing the rear spring assembly with a compatible multi-leaf pack.
⚠️ CV FRONT DRIVELINE REQUIRED — 4WD TRUCKS: A CV front driveline upgrade is required for 4WD operation above 20mph. The stock front driveline cannot safely operate at the CV joint angles generated by 6 inches of front lift at speed in 4WD. Add a compatible CV front driveline upgrade to your order — contact the OFAS team to confirm the correct part for your specific truck.
⚠️ ARC ADAPTIVE RIDE CONTROL BYPASS REQUIRED — DENALI MODELS: 2019–2025 GMC Sierra 1500 Denali and Denali Ultimate models equipped with ARC (Adaptive Ride Control) require bypassing the ARC system before installation. Failure to bypass the ARC system will result in system fault codes and compromised suspension function after installation. Contact the OFAS team for ARC bypass guidance before ordering.
⚠️ 2025 MODEL YEAR REQUIREMENT: 2025 Silverado/Sierra 1500 models require the addition of the Leaf Spring Top Plate Conversion kit (sold separately) for proper rear installation. Add this component to your order when purchasing for a 2025 model year truck.
Requires front alignment immediately post-installation — at 6 inches of front lift, caster and camber correction is critical before any driving.
Requires ADAS recalibration if equipped with forward collision alert, lane departure warning, adaptive cruise control, or Super Cruise.
Shipping Notice: At 460 lbs, this kit ships via LTL freight carrier. Residential delivery is included.

Installation & Technical Notes

Estimated Install Time: 14-Hour DIY Install — complete front and rear suspension system with a 2-post lift, comprehensive hand tools, spring compressor, and torque wrench. Schedule an alignment appointment before beginning installation.
Mono-Leaf Spring Check: Before ordering, confirm your truck's rear spring configuration. Composite mono-leaf springs are identifiable by their single-leaf construction and composite (non-steel) material. If present, this kit requires a compatible multi-leaf rear spring replacement before installation.
CV Driveline: Install the CV front driveline upgrade before operating in 4WD above 20mph. Contact the OFAS team to confirm the correct CV driveline for your specific truck before ordering.
ARC Bypass (Denali): Complete the ARC Adaptive Ride Control bypass procedure before installation on Denali and Denali Ultimate models. Do not install this kit on an ARC-equipped truck without completing the bypass first.
2025 Leaf Spring Top Plate: Add the Leaf Spring Top Plate Conversion kit to your order for 2025 model year trucks before scheduling installation.
Alignment Required: Yes — professional front alignment is mandatory immediately after installation. At 6 inches of front lift, caster and camber deviation from factory specification must be corrected before any driving.
Torque Specifications: Refer to Cognito's included instruction sheet for all UCA, shock mount, and block hardware torque values — torque all fasteners with the suspension at ride height. Re-torque U-bolts after the first 500 miles.
Shipping Notice: At 460 lbs, this kit ships via LTL freight carrier. Residential delivery is included. A delivery appointment will be scheduled by the carrier.

Wheel & Tire Fitment

Maximum Confirmed Tire Size: 35x12.5" on a 10-inch wide wheel with 4.5-inch backspacing — verified clearance with this kit at 6 inches of front lift and 4 inches of rear lift on the 2019–2025 Silverado/Sierra 1500 platform.
Wheel Width: 10 inches recommended for maximum tire size
Maximum Backspacing: 4.5 inches with 35x12.5" tires
Contact the OFAS team to verify inner fender clearance and offset requirements for your specific cab, bed, and fender configuration before finalizing wheel and tire selection.

Our team is standing by to confirm your rear spring configuration, CV driveline selection, ARC bypass requirements (Denali), and 2025 Leaf Spring Top Plate need before we ship. Purchase with confidence; we review every build.