LLY Duramax Parts

The Cognito 3 Inch Performance Leveling Kit contains everything you need to level your truck or SUV with high quality components.The Cognito 3 Inch...

Fits: 10 vehicle models, including 2001 to 2013 Chevrolet Suburban 2500; 2001 to 2013 GMC Yukon XL 2500; 2001 to 2010 Chevrolet Silverado 2500 HD. ...

This bracket adds the upper driver side mount back to the front differential.The bracket is formed and fabricated with a semi-gloss powder coat fin...

FOX Part # - 987-24-074Increase your vehicle's off-road capability by extending drop-out travel in most applications. Experience on-road comfort wi...

This bracket provides additional clearance around the CV head on Cognito drivelines by relocating the shift linkage. Made in the USA.Notes:Required...

The idler pivot is what the idler arm mounts to and pivots about, and the OEM idler pivot has issues with bending the shaft and also bending the ta...

Cognito CV Front Driveline Kit For 7-9 Inch 10-12 Inch Lifts On 01-16 Silverado/Sierra 2500HD/3500HD Duramax. This direct bolt in driveline feature...

FOX Part # - 987-24-075Increase your vehicle's off-road capability by extending drop-out travel in most applications. Experience on-road comfort wi...

Pitman and Idler arms have been an inherent wear problem within the steering systems of Chevy and GMC trucks and SUVs for decades. The Cognito PISK...

The Cognito Ball Joint SM Series Upper Control Arms add style, function, and performance to your vehicle by improving the allowable droop travel fo...

Cognito CV Front Driveline Kit For 4-6 Inch Lift-Duramax/ 4-12 Inch Lift-Gas On 01-16 Silverado/Sierra 2500/3500/ 7-12 Inch Lift On 99-06 Silverado...

Used with short wheel base trucks with tall lift where no tapered blocks were available.Includes 2 shims and 2 center pins to bolt shims to leaf pa...

Used with short wheel base trucks with tall lift where no tapered blocks were available.Includes 2 shims and 2 center pins to bolt shims to leaf pa...

Fits: 12 vehicle models, including 2001 to 2025 Chevrolet Silverado 2500 HD; 2001 to 2025 GMC Sierra 2500 HD; 2007 to 2025 Chevrolet Silverado 3500...

Fits: 12 vehicle models, including 2001 to 2025 Chevrolet Silverado 2500 HD; 2001 to 2025 GMC Sierra 2500 HD; 2007 to 2025 Chevrolet Silverado 3500...

The Cognito Alloy Series Tie Rod kit is a Heavy-Duty stock replacement upgrade where the inner joint incorporates an oversized alloy ball and socke...

New Alloy Steel Extreme Duty Center Link And Tie Rods Direct Bolt In Complete Replacement For Stock Center Link And Tie Rod Assemblies.Also Convert...

These end links are also a little longer than OE recommended lengths to allow clearance for our Larger Diameter tie-rod upgrade. Used as a Heavy-Du...

These end links are also a little longer than recommended lengths to allow clearance for our Larger Diameter tie-rod upgrade. Used as a Heavy-Duty ...

These end links are also a little longer than recommended lengths to allow clearance for our Larger Diameter tie-rod upgrade. Used as a Heavy-Duty ...

Upgrade your truck’s performance and durability with the Firepunk 2001-2010 Allison Transmission Tubular Crossmember. Designed with strength, weigh...

2001-2005 Sierra/Silverado 2500HD/3500HD Allison Firepunk F2 Transmission Package Features: Great For Mildly Modified Trucks Up To 900HP 2-Year Un...

This billet C2 hub addresses early failures of the Allison transmission C-2 clutch hub in high torque and high horsepower applications. Features: ...

2001-2005 Sierra/Silverado 2500HD/3500HD Allison Firepunk F1 Transmission Package Features: Great For Mildly Modified Trucks Up To 750HP 2-Year Un...