Cognito Uniball Pin & Hardware Kit | 2001-2020 GM Trucks, SUVs & Hummer H2

The Obsidian Vision

When a Cognito uniball upper control arm is already doing the geometry correction work on your GM truck or SUV, the uniball pin and hardware kit is the precision service component that keeps that investment performing at specification — ensuring the outboard joint maintains its designed preload, angular range, and structural integrity through the full suspension travel arc. Cognito engineered this pin and hardware kit to exact dimensional tolerances for their uniball upper control arm lineup, eliminating the fitment compromises and accelerated wear that result from substituting generic or OEM-spec hardware in a corrected-geometry application. Built to the same quality standards as Cognito's full arm assemblies, this kit is the correct service solution for maintaining the ride quality, steering precision, and long-term durability that the original arm installation was designed to deliver.

Concierge Fitment Guarantee

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

Engineering Breakdown

• Restores factory-spec uniball preload and angular operating range in Cognito SM Series upper control arms, preventing the joint slop and steering vagueness that develop when uniball hardware wears beyond service tolerance.
• Eliminates the dimensional mismatch and accelerated wear caused by substituting non-Cognito hardware in a corrected-geometry upper arm application where pin diameter, thread pitch, and bearing seat geometry are specific to Cognito's uniball assembly.
• Maintains the suspension geometry correction and droop travel gains delivered by the original Cognito arm installation, ensuring the full system continues to perform as engineered across the broad GM truck and SUV platform range.

Cognito's uniball pin is machined to the dimensional tolerances required by their proprietary uniball joint assembly — pin diameter, thread engagement length, and bearing interface geometry are all specific to Cognito's upper control arm design and are not interchangeable with OEM or aftermarket hardware from other manufacturers. The included mounting hardware is grade-matched to Cognito's torque specifications, ensuring proper clamp load on the uniball housing without risk of thread galling or under-torque joint movement. This kit covers Cognito uniball upper control arms across the full GMT800, GMT900, and K2XX GM truck platform range, as well as the GMT360-based Hummer H2 and H2 SUT, making it the single correct service part for the majority of Cognito's GM half-ton and heavy-duty arm applications.

Audit Table

Verified Fitment (OFAS Standard)

✅ CONFIRMED — GM Heavy Duty Trucks (GMT800/GMT900):
2001–2019 Chevrolet Silverado 2500HD 2WD/4WD
2001–2019 GMC Sierra 2500HD 2WD/4WD
2007–2019 Chevrolet Silverado 3500HD 2WD/4WD
2007–2019 GMC Sierra 3500HD 2WD/4WD

✅ CONFIRMED — GM Half-Ton Trucks (K2XX) with OEM Aluminum or Stamped Steel UCAs:
2014–2018 Chevrolet Silverado 1500 2WD/4WD
2014–2018 GMC Sierra 1500 2WD/4WD
2019 Chevrolet Silverado 1500 LD 2WD/4WD

✅ CONFIRMED — GM Full-Size SUVs:
2014–2020 Chevrolet Tahoe (LS, LT, LTZ, Premier, PPV, SSV, Z71, Midnight Edition)
2015–2020 Chevrolet Suburban (LS, LT, LTZ, Premier, HD)
2014–2020 GMC Yukon (SLE, SLT, Denali)
2014–2020 GMC Yukon XL (SLE, SLT, Denali)
2014 Chevrolet Suburban 1500 (LS, LT, LTZ)
2014 GMC Yukon XL 1500 (SLE, SLT, Denali)
2001–2013 GM 2500 SUVs 2WD/4WD

✅ CONFIRMED — Hummer:
2003–2009 Hummer H2 2WD/4WD
2003–2009 Hummer H2 SUT 2WD/4WD

❌ REQUIREMENTS:
Requires existing Cognito uniball upper control arm installation — this kit is a service/replacement part specific to Cognito's proprietary uniball joint assembly and is not compatible with OEM upper control arms or other aftermarket arm brands.
Requires verification of arm generation — confirm your Cognito arm part number before ordering to ensure HP9159 is the correct pin spec for your specific arm assembly.
Requires torque-to-spec installation per Cognito's service documentation — do not substitute hardware or deviate from specified torque values.

Installation & Technical Notes

Estimated Install Time: Under 1 hour with basic hand tools and a floor jack
Alignment Required: Not required for pin replacement alone if suspension geometry has not been disturbed; recommended if any control arm mounting hardware was loosened during service.
Torque Specifications: Refer to Cognito's service documentation for the HP9159 pin torque spec — torque with the suspension at ride height to prevent bushing wind-up.
Service Interval: Inspect uniball pin and hardware for wear, corrosion, or joint slop at every alignment service or any time steering vagueness or clunking is detected from the front suspension.

Wheel & Tire Fitment

This is a service hardware kit — wheel and tire fitment is determined by the Cognito upper control arm assembly already installed on the vehicle. Refer to the original arm kit's fitment documentation for tire size, wheel backspacing, and offset specifications applicable to your platform and lift height.

Our team is standing by to verify your specific Cognito arm part number and confirm HP9159 is the correct pin kit for your build. Purchase with confidence; we review every build.