Cognito 5" Elite Lift Kit with Elka 2.5 Reservoir Shocks | 2020-2025 Silverado/Sierra 2500HD/3500HD

The Obsidian Vision

Five inches of front lift and three inches of rear lift on a 2020–2025 Silverado or Sierra 2500HD/3500HD is a meaningful suspension upgrade — and the Elka 2.5 Dual Speed Compression reservoir shocks are the component that defines this kit's character at the top of the 5-inch T1 heavy-duty lift system tier. The Cognito 5-Inch Elite Lift Kit pairs the Elka 2.5's user-adjustable high- and low-speed compression damping with the Cognito SM Series Ball Joint Upper Control Arms, the patented Pitman and Idler Arm Support Kit, forged torsion bar keys, and a 3-inch block and U-bolt kit — a complete, no-guesswork system engineered, manufactured, and assembled in the USA. Before ordering, one requirement must be confirmed: this kit is not compatible with AT4X and ZR2 models. For those platforms, see the Cognito Super Stock Kit (110-P1268).

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 5 inches via forged torsion bar keys that set the front ride height with the precision and durability that forged construction provides, combined with the Cognito SM Series Ball Joint Upper Control Arms that correct the ball joint angle, add droop travel, and maintain proper CV axle geometry at the elevated ride height.
• Delivers elite-tier front damping through the Elka 2.5 Dual Speed Compression reservoir shocks, which provide user-adjustable high-speed and low-speed compression damping — allowing the owner to tune the shock's response to washboard, square-edge impacts, and high-speed terrain independently, reducing cabin vibration and noise, eliminating front-end dive under braking, preventing rear-end bucking under load, and optimizing damping for towing and payload configurations without returning to a shop.
• Eliminates pitman and idler arm wear and steering system compliance through the patented Cognito Pitman and Idler Arm Support Kit, which addresses the root cause of GM steering system degradation at elevated tie rod angles — the Utility Patent-backed support kit that fixes the flaw and controls the GM pitman and idler arm steering system properly, paired with a 3-inch cast steel block and heavy-duty zinc plated U-bolt kit for the rear lift increment.

The Elka 2.5 Dual Speed Compression shocks are the premium adjustable reservoir shock for this application — the 2.5-inch body diameter provides increased oil volume relative to 2.0-inch designs, and the external reservoir maintains a constant oil supply to the piston, preventing cavitation and aeration under sustained use. The Dual Speed Compression (DSC) adjustment allows independent tuning of high-speed compression (controls response to sharp, high-velocity impacts like square-edge bumps and washboard) and low-speed compression (controls body motion during cornering, braking, and slow terrain articulation) — the level of damping adjustability that allows the owner to optimize the shock for their specific use case without replacing the shock. The SM Series Ball Joint UCAs feature boxed sheet-metal construction, welded seams, semi-gloss black powder coat, and pre-installed maintenance-free ball joints and pivot bushings. The forged torsion bar keys are practically indestructible and bolt in for easy installation. All Cognito components are engineered, manufactured, and assembled in the USA. At 440 lbs, this kit ships via LTL freight carrier 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:
⚠️ NOT COMPATIBLE WITH AT4X AND ZR2 MODELS: This kit is not compatible with the 2024–2025 GMC Sierra 2500HD AT4X or 2024–2025 Chevrolet Silverado 2500HD ZR2. These models use a factory-leveled suspension configuration that requires a different kit. See the Cognito Super Stock Kit (110-P1268) for AT4X and ZR2 applications.
Requires front alignment immediately post-installation — torsion bar key height setting and UCA ball joint angle correction both affect caster and camber; alignment is mandatory before driving.
Requires driveline u-joint angle verification post-installation at 3 inches of rear lift before towing at rated capacity.
Requires ADAS recalibration if equipped with forward collision alert, lane departure warning, or adaptive cruise control.
Shock Comparison: If user-adjustable DSC damping is not required, the Cognito 5-Inch Performance Lift Kit with Fox 2.0 PSRR (110-P1270) delivers the same lift system at a lower price point with factory-tuned non-adjustable damping.
Shipping Notice: At 440 lbs, this kit ships via LTL freight carrier. Residential delivery is included.

Installation & Technical Notes

Estimated Install Time: Professional installation recommended — torsion bar key installation, UCA replacement, PISK installation, and rear block installation require a 2-post lift, comprehensive hand tools, torsion bar unloading tool, and torque wrench. Schedule an alignment appointment before beginning installation.
AT4X/ZR2 Verification: Confirm your truck is not an AT4X or ZR2 model before ordering. These trims use a factory-leveled suspension configuration that is not compatible with this kit.
Torsion Bar Keys: Unload the factory torsion bars completely before removing the factory adjuster keys. Install the forged Cognito keys and set ride height per Cognito's included instructions — verify droop travel is adequate after setting height before finalizing.
Alignment Required: Yes — professional front alignment is mandatory immediately after installation. Torsion bar key height and UCA ball joint angle correction both affect caster and camber and must be set to specification before driving.
Elka DSC Setup: Set the Elka 2.5 DSC high-speed and low-speed compression adjusters to Cognito's recommended baseline settings before driving. Fine-tune from the baseline for your specific use case — softer low-speed compression for unladen street driving, firmer for towing and payload.
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 U-bolts after the first 500 miles.
Shipping Notice: At 440 lbs, this kit ships via LTL freight carrier. Residential delivery is included. A delivery appointment will be scheduled by the carrier.

Wheel & Tire Fitment

Tire fitment at 5 inches of front lift on the 2020–2025 Silverado/Sierra 2500HD/3500HD platform varies by wheel width, offset, and fender configuration. The following configurations have been verified — all require a tie back kit unless noted:

37x12.50 on stock 20" wheel: Requires a wheel spacer of at least 1/4" (1.5" spacer recommended for appearance). Tie back kit + medium trimming required.
35" on 10" wide wheel, +18mm offset: Tie back kit + light trimming required.
35" on 10" wide wheel, 0mm offset: Tie back kit + medium trimming required.
37x12.50 on 9" wide wheel, +18mm offset: Tie back kit + light trimming required.
37x12.50 on 9" wide wheel, 0mm offset: Tie back kit + medium trimming required.
37x12.50 on 10" wide wheel, +18mm offset: Tie back kit + medium trimming required.
37x12.50 on 10" wide wheel, 0mm offset: Tie back kit + heavy trimming required.

Contact the OFAS team to verify your specific wheel and tire configuration before ordering.

Our team is standing by to verify your specific trim (non-AT4X/ZR2), wheel offset, tire size, and Elka DSC setup for your build. Purchase with confidence; we review every build.