Cognito Uniball SM Series Upper Control Arm Kit | 2019-2025 Silverado/Sierra 1500 2WD/4WD

The Obsidian Vision

On a 2019–2025 Silverado or Sierra 1500, the Cognito SM Series Uniball Upper Control Arm Kit reestablishes the front suspension geometry that the factory engineers intended — before lift height, leveling pucks, or aggressive tire sizing compromised the uniball operating angle and robbed the truck of its engineered droop travel. These USA-made, boxed sheet-metal arms correct the uniball angle for lifted and leveled applications, restoring the suspension arc that eliminates harsh rebound, prevents premature lower ball joint wear, and returns the steering precision that defines a properly built half-ton platform. With FK 1.25-inch uniball joints, new crush sleeves, and polyurethane bushings pre-installed at the factory, this kit is engineered to perform under sustained towing loads, daily highway miles, and the lateral demands of off-camber terrain without compromise.

Concierge Fitment Guarantee

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

Engineering Breakdown

• Corrects the uniball operating angle for lifted and leveled T1 Silverado/Sierra 1500 applications, eliminating the suspension bind and accelerated lower ball joint wear caused by OEM rubber-bushed arms operating outside their designed angular range.
• Increases allowable front droop travel beyond the factory upper arm's range, restoring the suspension compliance required for consistent tire contact patch, controlled rebound damping, and long-term shock absorber integrity.
• Adds positive caster correction to the front suspension geometry, improving straight-line stability, steering returnability, and high-speed tracking precision on lifted applications where factory caster is reduced.

Cognito's SM Series arms are constructed from high-strength boxed sheet-metal stampings, fully seam-welded and finished in an electrostatic semi-gloss black powder coat that is oven-cured for corrosion resistance in road-salt and off-road environments. The outboard FK 1.25-inch uniball joint operates on a hardened steel race engineered to tolerate the angular misalignment loads generated by 0–4 inches of lift without inducing the bind that causes factory rubber-bushed arms to transmit harshness into the cab and accelerate wear across the entire front suspension system. New crush sleeves are included to ensure proper preload on the frame-end pivot, and the polyurethane bushings are selected to a durometer that balances NVH isolation with the lateral stiffness required to hold caster and camber stable under braking and cornering loads — a balance that factory rubber bushings cannot sustain once lift height alters the suspension's operating arc. All fabrication is performed in the USA.

Audit Table

Verified Fitment (OFAS Standard)

✅ CONFIRMED:
2019–2025 Chevrolet Silverado 1500 Base 2WD/4WD
2019–2025 Chevrolet Silverado 1500 Custom 2WD/4WD
2019–2025 Chevrolet Silverado 1500 Custom Trail Boss 4WD
2019–2025 Chevrolet Silverado 1500 LT 2WD/4WD
2019–2025 Chevrolet Silverado 1500 LT Trail Boss 4WD
2019–2025 Chevrolet Silverado 1500 RST 2WD/4WD
2019–2025 Chevrolet Silverado 1500 LTZ 2WD/4WD
2019–2025 Chevrolet Silverado 1500 High Country 2WD/4WD
2022–2025 Chevrolet Silverado 1500 ZR2 4WD
2023–2025 Chevrolet Silverado 1500 Base 2WD/4WD
2019–2025 GMC Sierra 1500 Base 2WD/4WD
2019–2025 GMC Sierra 1500 SLE 2WD/4WD
2019–2025 GMC Sierra 1500 Elevation 2WD/4WD
2019–2025 GMC Sierra 1500 SLT 2WD/4WD
2019–2025 GMC Sierra 1500 AT4 4WD
2019–2025 GMC Sierra 1500 Denali 2WD/4WD
2022–2025 GMC Sierra 1500 AT4X 4WD
2022–2025 GMC Sierra 1500 Denali Ultimate 2WD/4WD
2022–2025 GMC Sierra 1500 Pro 2WD/4WD

❌ REQUIREMENTS:
Requires front alignment immediately post-installation — caster and camber must be reset to specification before driving.
Requires compatible front shock absorber with sufficient extended length to accommodate increased droop travel — verify shock travel spec before ordering if running a non-Cognito shock.
Requires 17-inch or larger wheels with a maximum of 5.0 inches of backspacing when running 35-inch tires to ensure adequate clearance at full droop and full compression.
Note: This kit is designed for the T1 platform (2019–2025 GMTK2XX). It does not fit the previous K2XX generation (2014–2018 Silverado/Sierra 1500).

Installation & Technical Notes

Estimated Install Time: 1.5-Hour DIY Install (per side, with basic lift equipment and hand tools)
Alignment Required: Yes — front caster and camber must be reset post-installation. Preferred caster spec: +3.5° to +4.5° for lifted applications; camber within ±0.5° of zero.
Torque Specifications: Refer to Cognito's included instruction sheet for final torque values on all pivot and uniball hardware — torque all fasteners with the suspension loaded at ride height (not at full droop) to prevent bushing wind-up and premature wear.
ADAS Recalibration: Silverado and Sierra 1500 models equipped with Super Cruise, adaptive cruise control, forward collision alert, or lane-keep assist require front camera and radar recalibration after any ride height change exceeding 1 inch.
Supporting Modifications: For lifts exceeding 2.5 inches, verify front CV axle boot clearance at full droop and consider extended front sway bar end links to maintain proper anti-roll bar geometry and prevent bind.

Wheel & Tire Fitment

Recommended Tire Size: Up to 35x12.50R18 with 2–3.5 inches of front lift
Maximum Tire Size: 35-inch diameter — 37-inch tires require additional trimming and are not recommended without a full suspension system
Wheel Width: 8–9 inches recommended
Maximum Backspacing: 5.0 inches (to prevent inner fender contact at full compression with 35-inch tires)
Recommended Offset: 0mm to +18mm — negative offset wheels increase scrub radius and are not recommended with corrected-geometry upper arms

Our team is standing by to verify your specific shock travel, wheel backspacing, and lift configuration. Purchase with confidence; we review every build.