Cognito 7" Premier Lift Kit with Elka 2.5 DSC Reservoir Shocks | 2020-2025 Silverado/Sierra 2500HD/3500HD

The Obsidian Vision

Seven inches of front lift and five inches of rear lift on a 2020–2025 Silverado or Sierra 2500HD/3500HD — the Cognito 7-Inch Premier Lift Kit with Elka 2.5 DSC Reservoir Shocks delivers the complete front suspension system of the Elite kit at a lower price point by using a Cognito 5-inch block and U-bolt kit for the rear lift rather than the Deaver complete leaf spring replacement. The front system is identical: SM Series Ball Joint Upper Control Arms correcting ball joint angle and improving droop travel, SM Series Compression Struts maintaining front suspension geometry at 7 inches, the patented PISK eliminating pitman and idler arm compliance, stainless steel extended brake lines, and the Elka 2.5 Dual Speed Compression reservoir shocks with user-adjustable high- and low-speed compression damping. The rear lift is achieved with a 5-inch cast steel block and heavy-duty zinc plated U-bolt kit. If wheel hop and axle wrap under hard acceleration are a concern for your use case, see the Cognito 7-Inch Elite Lift Kit (210-P1184), which replaces the rear spring with a Deaver leaf pack and uses a 1-inch block for the final inch of rear lift. CV driveline required for 4WD operation above 20mph — not included. All Cognito components engineered, manufactured, and assembled 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

• Lifts the front of the 2020–2025 Silverado/Sierra 2500HD/3500HD 7 inches via SM Series Ball Joint Upper Control Arms that correct the ball joint angle and improve droop travel at the elevated ride height, SM Series Compression Struts that maintain front suspension geometry at 7 inches of lift, and the patented Cognito PISK that eliminates the pitman and idler arm compliance that degrades steering precision and accelerates center link wear at elevated tie rod angles — the complete front suspension geometry correction system required for a 7-inch lift to perform as engineered.
• Delivers 5 inches of rear lift through a Cognito 5-inch cast steel block and heavy-duty zinc plated U-bolt kit — a cost-effective rear lift solution that achieves the target ride height without replacing the factory leaf spring assembly, with stainless steel extended brake lines accommodating the increased rear suspension travel range. For builds where wheel hop and axle wrap under hard acceleration are a concern, the 7-Inch Elite Kit (210-P1184) uses a Deaver complete leaf spring replacement and a 1-inch block for the same 5 inches of rear lift with reduced axle wrap.
• Provides elite-tier front damping through the Elka 2.5 Dual Speed Compression reservoir shocks, which allow independent user adjustment of high-speed compression (sharp impacts, washboard) and low-speed compression (body motion, cornering, towing) — delivering reduced cabin vibration and noise, eliminated front-end dive under braking, prevented rear-end bucking under load, and optimized damping for towing and payload configurations without returning to a shop.

The SM Series Ball Joint UCAs use boxed sheet metal construction, welded seams, semi-gloss black powder coat, and pre-installed maintenance-free ball joints and pivot bushings. The SM Series Compression Struts maintain the front suspension geometry that the factory struts cannot maintain at 7 inches of lift. The patented Cognito PISK converts the factory single-shear pitman and idler arm mount to a double-shear configuration, eliminating the forward and rearward center link movement that causes steering system compliance and accelerated wear. The Cognito 5-inch block is cast steel, powder coated semi-gloss black, with heavy-duty zinc plated U-bolts. The Elka 2.5 DSC shocks use a 2.5-inch aluminum body with a remote reservoir that maintains a constant oil supply to the piston, preventing cavitation and aeration under sustained use. CV driveline required for 4WD operation above 20mph — sold separately. At 406 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 SRW & DRW
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 DRIVELINE REQUIRED FOR 4WD ABOVE 20MPH: A CV front driveline is required for safe 4WD operation above 20mph at 7 inches of front lift. The CV driveline is not included in this kit and must be purchased separately. See the Cognito CV Driveline Kit for your specific model year and transmission configuration.
Premier vs. Elite — Rear Lift Method: This Premier kit uses a 5-inch block and U-bolt kit for rear lift. If wheel hop or axle wrap under hard acceleration is a concern, the Cognito 7-Inch Elite Lift Kit (210-P1184) uses a Deaver complete leaf spring replacement + 1-inch block for the same 5 inches of rear lift with reduced axle wrap.
Requires front alignment immediately post-installation — at 7 inches of front lift, caster and camber correction is critical before any driving.
Requires ADAS recalibration if equipped with adaptive cruise control, forward collision warning, lane-keep assist, or Super Cruise.
Requires rear driveline angle verification post-installation to confirm u-joint operating angles are within GM's specification before towing at rated capacity.
Shipping Notice: At 406 lbs, this kit ships via LTL freight carrier. Residential delivery is included.

Installation & Technical Notes

Estimated Install Time: 16-Hour DIY Install — with a 2-post lift, comprehensive hand tools, torque wrench, ball joint press, and alignment appointment scheduled immediately after installation.
CV Driveline: Source and install the appropriate Cognito CV driveline kit for your model year and transmission configuration before operating in 4WD above 20mph.
Alignment Required: Yes — professional front alignment is mandatory immediately after installation.
ADAS Recalibration: Models equipped with adaptive cruise, forward collision warning, lane-keep assist, or Super Cruise require front camera and radar recalibration after installation.
Elka DSC Setup: Set the Elka 2.5 DSC high-speed and low-speed compression adjusters to Cognito's recommended baseline settings before driving.
Rear Block Torque: Torque all U-bolt nuts to specification with the suspension at ride height under load. Re-torque after the first 500 miles.
Torque Specifications: Refer to Cognito's included instruction sheet for all component torque values.
Shipping Notice: At 406 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: 37x12.5" on a 10-inch wide wheel with 4.75-inch backspacing — verified clearance at 7 inches of front lift and 5 inches of rear lift on the 2020–2025 Silverado/Sierra 2500HD/3500HD platform.
Contact the OFAS team to verify inner fender clearance and offset requirements for your specific configuration before finalizing wheel and tire selection.

Our team is standing by to verify your specific CV driveline requirement, rear lift preference (Premier block vs. Elite Deaver leaf), and 37-inch tire and wheel setup for your 7-inch build. Purchase with confidence; we review every build.