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Duramax Parts

Duramax parts for every 6.6L Duramax in Chevy Silverado HD and GMC Sierra HD trucks, from the 2001 LB7 to the current L5P. Pick your engine below to see parts that fit your truck.

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  • Cognito 20-24 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD Front Fender Liner Tie Back Kit

    Cognito
    Original price $99.95 - Original price $99.95
    Original price
    $99.95
    $99.95 - $99.95
    Current price $99.95

    The Cognito Front Fender Liner Tie Back Kit makes fitting larger tires and offset wheels easier on your 20-23 Silverado/Sierra 2500/3500 trucks.For...

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    Original price $99.95 - Original price $99.95
    Original price
    $99.95
    $99.95 - $99.95
    Current price $99.95
  • Cognito 20-24 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD Torsion Bar Keys

    Cognito
    Original price $139.95 - Original price $139.95
    Original price
    $139.95
    $139.95 - $139.95
    Current price $139.95

    Cognito Torsion Bar Keys levels the front with the rear of the truck. Their forged construction makes them practically indestructible and they bolt...

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    Original price $139.95 - Original price $139.95
    Original price
    $139.95
    $139.95 - $139.95
    Current price $139.95
  • Cognito 20-24 Chev Silv/Sierra 2500/3500HD Tubular Series LDG Traction Bar Kit - For 0-4in Rear Lift

    Cognito
    Original price $1,230.45 - Original price $1,230.45
    Original price
    $1,230.45
    $1,230.45 - $1,230.45
    Current price $1,230.45

    The Cognito Tubular Series LDG Traction Bar Kit features adjustability that enables you to control unwanted axle wrap without restricting suspensio...

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    Original price $1,230.45 - Original price $1,230.45
    Original price
    $1,230.45
    $1,230.45 - $1,230.45
    Current price $1,230.45
  • Cognito 20-24 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD 2in Economy Leveling Lift Kit

    Cognito
    Original price $359.95 - Original price $359.95
    Original price
    $359.95
    $359.95 - $359.95
    Current price $359.95

    The Cognito 2 Inch Economy Leveling Kit offers a cost-effective solution to improve vehicle appearance. The included front shock spacers allow for ...

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    Original price $359.95 - Original price $359.95
    Original price
    $359.95
    $359.95 - $359.95
    Current price $359.95
  • Cognito Enhancement Plate Kit for SM Series LDG Traction Bar Kit

    Cognito
    Original price $229.95 - Original price $229.95
    Original price
    $229.95
    $229.95 - $229.95
    Current price $229.95

    Give your Cognito traction bar system a clean, customized finishing touch with the Cognito Enhancement Plate Kit. Designed to complement select Cog...

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    Original price $229.95 - Original price $229.95
    Original price
    $229.95
    $229.95 - $229.95
    Current price $229.95
  • Cognito 1in Uniball Internal Retaining Ring Kit

    Cognito
    Original price $85.55 - Original price $85.55
    Original price
    $85.55
    $85.55 - $85.55
    Current price $85.55

    Kit includes (1) 1 Inch FK Uniball and (1) Retaining Ring

    Original price $85.55 - Original price $85.55
    Original price
    $85.55
    $85.55 - $85.55
    Current price $85.55
  • Cognito 11-24 Chev Silv/Sierra 2500/3500 HD 2WD/4WD 1in Block and 16in U-bolt Kit (steel/straight)

    Cognito
    Original price $213.95 - Original price $213.95
    Original price
    $213.95
    $213.95 - $213.95
    Current price $213.95

    Upgrade your truck’s rear suspension with the Cognito 1.0-Inch Block and U-Bolt Kit, designed to provide a clean, functional lift while maintaining...

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    Original price $213.95 - Original price $213.95
    Original price
    $213.95
    $213.95 - $213.95
    Current price $213.95
  • Cognito 11-19 Chevy/GMC Silv/Sierra 2500/3500 HD 2WD/4WD 3in Premier Leveling Kit w/ 2.0 RR Shocks

    Cognito
    Original price $2,399.95 - Original price $2,399.95
    Original price
    $2,399.95
    $2,399.95 - $2,399.95
    Current price $2,399.95

    The Cognito SM Series Upper Control Arms are designed to provide improved performance, style, and function for stock, leveled, and lifted applicati...

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    Original price $2,399.95 - Original price $2,399.95
    Original price
    $2,399.95
    $2,399.95 - $2,399.95
    Current price $2,399.95
  • Fox 01-10 GM 2500HD/3500HD 2.5 IFP Perf. Series IFP Front Shock - 0-2.5in Lift

    FOX
    Original price $346.95 - Original price $346.95
    Original price
    $346.95
    $346.95 - $346.95
    Current price $346.95

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

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    Original price $346.95 - Original price $346.95
    Original price
    $346.95
    $346.95 - $346.95
    Current price $346.95
  • Cognito 05-19 Chevy Silv/Sierra 2500/3500 HD 4WD (w/ 6Spd Allison ONLY) Allison Transmission Bracket

    Cognito
    Original price $54.95 - Original price $54.95
    Original price
    $54.95
    $54.95 - $54.95
    Current price $54.95

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

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    Original price $54.95 - Original price $54.95
    Original price
    $54.95
    $54.95 - $54.95
    Current price $54.95
  • Cognito 01-13 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD Idler Arm Support Weld In Gusset

    Cognito
    Original price $239.95 - Original price $239.95
    Original price
    $239.95
    $239.95 - $239.95
    Current price $239.95

    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...

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    Original price $239.95 - Original price $239.95
    Original price
    $239.95
    $239.95 - $239.95
    Current price $239.95
  • Cognito 01-16 Chevy/GMC Silverado/Sierra 2500/3500 HD CV Front Driveline Kit

    Cognito
    Original price $699.95 - Original price $699.95
    Original price
    $699.95
    $699.95 - $699.95
    Current price $699.95

    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...

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    Original price $699.95 - Original price $699.95
    Original price
    $699.95
    $699.95 - $699.95
    Current price $699.95
  • Fox 01-10 GM 2500HD/3500HD 2.5 IFP Perf. Series IFP Rear Shock - 0-1in Lift

    FOX
    Original price $346.95 - Original price $346.95
    Original price
    $346.95
    $346.95 - $346.95
    Current price $346.95

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

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    Original price $346.95 - Original price $346.95
    Original price
    $346.95
    $346.95 - $346.95
    Current price $346.95
  • Cognito 01-13 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD Forged Pitman Idler Arm Support Kit

    Cognito
    Original price $259.95 - Original price $259.95
    Original price
    $259.95
    $259.95 - $259.95
    Current price $259.95

    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...

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    Original price $259.95 - Original price $259.95
    Original price
    $259.95
    $259.95 - $259.95
    Current price $259.95
  • Cognito 01-13 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD Ball Joint SM Series UCA Kit

    Cognito
    Original price $629.95 - Original price $629.95
    Original price
    $629.95
    $629.95 - $629.95
    Current price $629.95

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

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    Original price $629.95 - Original price $629.95
    Original price
    $629.95
    $629.95 - $629.95
    Current price $629.95
  • Cognito 99-16 Chevy/GMC Silverado/Sierra 2500/3500 HD CV Front Driveline Kit for 4-6in Lift

    Cognito
    Original price $699.95 - Original price $699.95
    Original price
    $699.95
    $699.95 - $699.95
    Current price $699.95

    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...

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    Original price $699.95 - Original price $699.95
    Original price
    $699.95
    $699.95 - $699.95
    Current price $699.95
  • Cognito 99-19 Chevy/GMC Silverado/Sierra 1500/2500/3500 2WD/4WD 4 Degree Rear Pinion Angle Shim Kit

    Cognito
    Original price $69.95 - Original price $69.95
    Original price
    $69.95
    $69.95 - $69.95
    Current price $69.95

    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...

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    Original price $69.95 - Original price $69.95
    Original price
    $69.95
    $69.95 - $69.95
    Current price $69.95
  • Cognito 99-19 Chevy/GMC Silverado/Sierra 1500/2500/3500 2WD/4WD 3 Degree Rear Pinion Angle Shim Kit

    Cognito
    Original price $69.95 - Original price $69.95
    Original price
    $69.95
    $69.95 - $69.95
    Current price $69.95

    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...

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    Original price $69.95 - Original price $69.95
    Original price
    $69.95
    $69.95 - $69.95
    Current price $69.95
  • Cognito 11-19 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD Comfort Ride Torsion Bar kit

    Cognito
    Original price $944.95 - Original price $944.95
    Original price
    $944.95
    $944.95 - $944.95
    Current price $944.95

    The Cognito Comfort Ride Torsion Bars feature a reduced rate which offers a superior ride in comparison to the stiff OEM torsion bars.Built to OEM ...

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    Original price $944.95 - Original price $944.95
    Original price
    $944.95
    $944.95 - $944.95
    Current price $944.95
  • Cognito 01-24 Chevy Silv/Sierra 2500/3500 HD / Ford F250/350 SD 4WD Carrier Bearing Spacer 3-4 Inch

    Cognito
    Original price $96.25 - Original price $96.25
    Original price
    $96.25
    $96.25 - $96.25
    Current price $96.25

    Cognito 01-24 Chevy Silv/Sierra 2500/3500 HD / Ford F250/350 SD 4WD Carrier Bearing Spacer 3-4 InchThis Part Fits: Year Make Model Submodel 2001...

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    Original price $96.25 - Original price $96.25
    Original price
    $96.25
    $96.25 - $96.25
    Current price $96.25
  • Cognito 01-24 Chevy Silv/Sierra 2500/3500 HD / Ford F250/350 SD 4WD Carrier Bearing Spacer 2-3 Inch

    Cognito
    Original price $96.25 - Original price $96.25
    Original price
    $96.25
    $96.25 - $96.25
    Current price $96.25

    Cognito 01-24 Chevy Silv/Sierra 2500/3500 HD / Ford F250/350 SD 4WD Carrier Bearing Spacer 2-3 InchThis Part Fits: Year Make Model Submodel 2001...

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    Original price $96.25 - Original price $96.25
    Original price
    $96.25
    $96.25 - $96.25
    Current price $96.25
  • Cognito 11-25 Chevrolet Silverado 2500/3500HD / 11-25 GMC Sierra 2500/3500HD Steering Idler Arm

    Cognito
    Original price $367.15 - Original price $367.15
    Original price
    $367.15
    $367.15 - $367.15
    Current price $367.15

    For model years 2011–2014 and most of 2015, GM included OEM provisions for a steering stabilizer, requiring two mounting points: one on the right s...

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    Original price $367.15 - Original price $367.15
    Original price
    $367.15
    $367.15 - $367.15
    Current price $367.15
  • Cognito 11-19 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD Ball Joint SM Series UCA Kit

    Cognito
    Original price $699.98 - Original price $699.98
    Original price
    $699.98
    $699.98 - $699.98
    Current price $699.98

    Fits as stock replacement or leveled and lifted applications where an upgrade is desired to provide better performance, style, and function.The Cog...

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    Original price $699.98 - Original price $699.98
    Original price
    $699.98
    $699.98 - $699.98
    Current price $699.98
  • Cognito 11-24 Chevy/GMC Silverado/Sierra 2500/3500 HD 2WD/4WD Supersteer Idler Arm Support

    Cognito
    Original price $267.45 - Original price $267.45
    Original price
    $267.45
    $267.45 - $267.45
    Current price $267.45

    Looseness or Steering Play in some vehicle steering systems can often be attributed to a component known as a bell crank or idler, which supports t...

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    Original price $267.45 - Original price $267.45
    Original price
    $267.45
    $267.45 - $267.45
    Current price $267.45

Duramax parts and performance upgrades for every 6.6L Duramax, from the 2001 LB7 to the current L5P. We carry injectors, fuel systems, turbos, tuning, Allison transmission parts and suspension from Kryptonite, Pro Form Fab and more.

Shop by Duramax Engine

Not sure what fits? Send us your VIN or call 865.640.2097 and we will match the right part.

Duramax FAQ

Which Duramax do I have?

The engine code is stamped on the block and often on a decal under the hood. LB7 ran 2001 to 2004, LLY 2004.5 to 2005, LBZ 2006 to 2007, LMM 2007.5 to 2010, LML 2011 to 2016, and L5P 2017 on.

Do parts interchange between Duramax generations?

Some suspension and driveline parts do, but fuel system, turbo and tuning parts are specific to each engine generation. Shop by engine and year, or send us your VIN.

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