Cognito 7" Elite Lift Kit with Elka 2.5 Remote Reservoir Shocks | 2011-2019 Silverado/Sierra 2500HD/3500HD

The Obsidian Vision

Seven inches of front lift and four inches of rear lift on a 2011–2019 Silverado or Sierra 2500HD/3500HD — the Cognito 7-Inch Elite Lift Kit with Elka 2.5 Remote Reservoir Shocks is the complete K2 generation system that delivers it without guesswork. SM Series Ball Joint Upper Control Arms correct the ball joint angle and improve droop travel. SM Series Compression Struts maintain front suspension geometry at 7 inches. The patented PISK eliminates pitman and idler arm compliance. A Deaver complete replacement leaf spring pack arched for 4 inches of rear lift delivers the rear height without a lift block, eliminating wheel hop and axle wrap. The 1.5-inch 4140 chromoly HD front sway bar controls body roll at the elevated ride height. Stainless steel extended brake lines accommodate the increased suspension travel. And the Elka 2.5 Remote Reservoir compression-adjustable shocks — front and rear — provide the damping performance that a 7-inch lifted K2 2500HD/3500HD demands on road and off. Non-torsion bar drop design. 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 2011–2019 K2 Silverado/Sierra 2500HD/3500HD 7 inches via SM Series Ball Joint Upper Control Arms that correct the ball joint angle and improve droop travel, SM Series Compression Struts that maintain front suspension geometry at 7 inches, 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 — a non-torsion bar drop design that delivers corrected CV joint angles and superior ride quality at the elevated ride height.
• Delivers 4 inches of rear lift through a Deaver complete OEM replacement leaf spring pack arched for 4 inches of rear lift over stock height — eliminating the wheel hop and axle wrap that a lift block introduces, with stainless steel extended brake lines accommodating the increased rear suspension travel range. The Deaver pack uses high-quality spring steel with a higher leaf count and thinner individual leaf material for a progressive, compliant ride at the elevated rear ride height.
• Controls body roll at 7 inches of front lift with the Cognito 1.5-inch 4140 chromoly HD front sway bar — heat-treated and hot-formed, with polyurethane bushings and larger sway bar clamps included — and delivers front and rear damping through the Elka 2.5 Remote Reservoir compression-adjustable shocks, which use a rust-resistant metal impact extruded aluminum body with a remote reservoir to eliminate oil aeration and maintain consistent, factory-tuned precision valving performance under sustained on-road and off-road use.

The SM Series Ball Joint UCAs use CNC robot-welded boxed sheet metal construction, semi-gloss black powder coat, and pre-installed ball joints with new crush sleeves and polyurethane 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 Elka 2.5 Remote Reservoir shocks use a rust-resistant metal impact extruded aluminum body with a remote reservoir that maintains a constant oil supply to the piston, preventing oil aeration and fade under sustained use. The 1.5-inch 4140 chromoly HD sway bar is recommended for trucks lifted 7 inches and taller. At 458 lbs, this kit ships via LTL freight carrier with residential delivery included.

Audit Table

Verified Fitment (OFAS Standard)

✅ CONFIRMED — Chevrolet Silverado 2500HD (K2, 2011–2019):
2011–2019 Chevrolet Silverado 2500HD WT, LT, LTZ 2WD/4WD
2015–2019 Chevrolet Silverado 2500HD High Country 2WD/4WD

✅ CONFIRMED — Chevrolet Silverado 3500HD (K2, 2011–2019):
2011–2019 Chevrolet Silverado 3500HD WT, LT, LTZ 2WD/4WD SRW & DRW
2015–2019 Chevrolet Silverado 3500HD High Country 2WD/4WD SRW & DRW

✅ CONFIRMED — GMC Sierra 2500HD (K2, 2011–2019):
2011–2014 GMC Sierra 2500HD WT 2WD/4WD
2011–2019 GMC Sierra 2500HD SLE, SLT, Denali 2WD/4WD
2015–2019 GMC Sierra 2500HD (base) 2WD/4WD

✅ CONFIRMED — GMC Sierra 3500HD (K2, 2011–2019):
2011–2014 GMC Sierra 3500HD WT 2WD/4WD SRW & DRW
2011–2019 GMC Sierra 3500HD SLE, SLT, Denali 2WD/4WD SRW & DRW
2015–2019 GMC Sierra 3500HD (base) 2WD/4WD SRW & DRW

❌ REQUIREMENTS & CRITICAL NOTICES:
⚠️ K2 GENERATION ONLY (2011–2019): This kit is designed for the K2 generation Silverado/Sierra 2500HD/3500HD only. It is not compatible with the T1 generation (2020–2025). For T1 2500HD/3500HD applications, see the Cognito 7-Inch Elite Lift Kit for 2020–2025 (210-P1184).
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 forward collision alert, lane departure warning, or adaptive cruise control.
Requires rear driveline angle verification post-installation to confirm u-joint operating angles are within GM's specification before towing at rated capacity.
Requires rear pinion angle check — verify the Deaver leaf spring pinion angle is within GM's specification for the installed front and rear lift height combination before towing.
Shipping Notice: At 458 lbs, this kit ships via LTL freight carrier. Residential delivery is included.

Installation & Technical Notes

Estimated Install Time: 17-Hour DIY Install — with a 2-post lift, comprehensive hand tools, torque wrench, ball joint press, and alignment appointment scheduled immediately after installation.
Alignment Required: Yes — professional front alignment is mandatory immediately after installation.
ADAS Recalibration: Models equipped with forward collision alert, lane departure warning, or adaptive cruise control require front camera and radar recalibration after installation.
Elka Shock Setup: Set the Elka 2.5 compression adjusters on all four shocks to Cognito's recommended baseline settings before driving.
Rear Pinion Angle: Verify the rear differential pinion angle is within GM's specification after installation. A pinion angle shim may be required depending on the front and rear lift height combination.
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.
Shipping Notice: At 458 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: 37x13.5" on a 10-inch wide wheel with 5-inch backspacing — verified clearance with this kit at 7 inches of front lift and 4 inches of rear lift on the 2011–2019 K2 Silverado/Sierra 2500HD/3500HD platform.
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 verify your specific K2 configuration, ADAS equipment, and 37-inch tire and wheel setup for your 7-inch Elite build. Purchase with confidence; we review every build.