Sierra 3500 HD

aFe POWER's AAM 9.25 front differential cover brings performance engineering to the protection of your axle's differential. This differential cover is constructed out of durable cast aluminum with reinforcing ribs for maximum strength and comes with all...

Made from cast aluminum, these covers add strength to center of the transmission case eliminating trans oil seepage at the mating surface.Cooling fins double the surface area (60.74 sq. in.) when compared to stock (30.62 sq. in.), which increases heat...

Cracked transmission tail shaft housings (located between the transfer case and the transmission) are a common problem for GM Allison-equipped 4x4 pick-ups in off-road and drag racing applications. Even a nominal amount of driveline vibration can cause...

aFe POWER's rear differential cover brings performance engineering to the protection of your axle's differential. This differential cover is constructed out of durable cast aluminum with reinforced ribs for maximum strength. This cover comes with all...

The HDX Grille Guard is the ultimate in extreme truck gear. It's available in a stainless or black powder coat finish and the uprights are finished and protected with extra wide rubber that is 1/8" thick and 2 3/4" wide. The result is a solid clean look...

We have bundled everything you need in a lift kit for your Silverado/Sierra 2500/3500 2WD/4WD with high quality Cognito components. There is no guesswork. Cognito components are engineered, manufactured, and assembled in the USA.The Cognito Non-Torsion...

The HDX Grille Guard is the ultimate in extreme truck gear. It's available in a stainless or black powder coat finish and the uprights are finished and protected with extra wide rubber that is 1/8" thick and 2 3/4" wide. The result is a solid clean look...

The Cognito Ball Joint SM Series Upper Control Arms add style, function, and performance to your vehicle by correcting the Ball Joint angle for lifted and leveled applications and improving the allowable droop travel for a better ride quality.The boxed...

We have bundled everything you need in a lift kit for your Silverado/Sierra 2500/3500 2WD/4WD with high quality Cognito components. There is no guesswork. Cognito components are engineered, manufactured, and assembled in the USA.The Cognito Non-Torsion...

We have bundled everything you need in a lift kit for your Silverado/Sierra 2500/3500 2WD/4WD with high quality Cognito components. There is no guesswork. Cognito components are engineered, manufactured, and assembled in the USA.The Cognito Non-Torsion...

We have bundled everything you need in a lift kit for your Silverado/Sierra 2500/3500 2WD/4WD with high quality Cognito components. There is no guesswork. Cognito components are engineered, manufactured, and assembled in the USA.The Cognito Non-Torsion...

We have selected all the parts you'll need to lift your Silverado/Sierra 2500/3500 2WD/4WD 4 Inches with high quality Cognito components and Fox performance shocks.At the core of this lift package is our performance proven Cognito Front Suspension Lift...