Duramax Diesel Parts & Upgrades

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Cognito Fox Steering Stabilizer Kit for 11-25 GM 2500HD/3500HD - Southern Diesel Supply
Cognito Motorsports
Cognito Fox Steering Stabilizer Kit for 11-25 GM 2500HD/3500HD Sale price$359.99
Cognito Torsion Bar Keys for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Torsion Bar Keys for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$139.99
Cognito 4-Inch Standard Lift Kit for 19-25 Silverado/Sierra 1500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 4-Inch Standard Lift Kit for 19-25 Silverado/Sierra 1500 2WD/4WD Sale price$2,280.99
Cognito 7-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 7-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD Sale price$6,397.99
Cognito 3-Inch Standard Leveling Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Standard Leveling Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD Sale price$899.99
CV Front Driveline for 4-Inch, 7-Inch, and 10-Inch Cognito Lifts on 2020-2025 GM 2500HD / 3500HD Diesel Trucks Equipped with 10-Speed Allison Transmissions - Southern Diesel Supply
Cognito Motorsports
CV Front Driveline for 4-Inch, 7-Inch, and 10-Inch Cognito Lifts on 2020-2025 GM 2500HD / 3500HD Diesel Trucks Equipped with 10-Speed Allison Transmissions Sale price$799.99
Deaver Mini Leaf Pack Set for 11-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Deaver Mini Leaf Pack Set for 11-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$649.99
Cognito 1-Inch Standard Leveling Kit for 19-25 Silverado Trail Boss & ZR2 / Sierra AT4 & AT4X 1500 4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 1-Inch Standard Leveling Kit for 19-25 Silverado Trail Boss & ZR2 / Sierra AT4 & AT4X 1500 4WD Sale price$729.99
Cognito 6-Inch Standard Lift Kit with Fox PS 2.0 IFP Shocks for 01-10 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 6-Inch Standard Lift Kit with Fox PS 2.0 IFP Shocks for 01-10 Silverado/Sierra 2500/3500 2WD/4WD Sale price$4,144.99
Deaver 4 Inch Leaf Spring Pack K97 For 11-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Deaver 4 Inch Leaf Spring Pack K97 For 11-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$1,649.99
Cognito 3-Inch Standard Leveling Kit for 19-25 Silverado/Sierra 1500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Standard Leveling Kit for 19-25 Silverado/Sierra 1500 2WD/4WD Sale price$769.99
Deaver Mini Leaf Pack Set for 19-25 Silverado/Sierra 1500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Deaver Mini Leaf Pack Set for 19-25 Silverado/Sierra 1500 2WD/4WD Sale price$499.99
Cognito 6-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 6-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD Sale price$5,170.99
Cognito SM Series LDG Traction Bar Kit For 19-25 Silverado/Sierra 1500 2WD/4WD with 0-7 Inch Rear Lift Height - Southern Diesel Supply
Cognito Motorsports
Cognito SM Series LDG Traction Bar Kit For 19-25 Silverado/Sierra 1500 2WD/4WD with 0-7 Inch Rear Lift Height Sale price$1,749.99
Cognito Tubular Series LDG Traction Bar Kit for 19-25 Silverado/Sierra 1500 2WD/4WD with 0-7 Inch Rear Lift Height - Southern Diesel Supply
Cognito Motorsports
Cognito Tubular Series LDG Traction Bar Kit for 19-25 Silverado/Sierra 1500 2WD/4WD with 0-7 Inch Rear Lift Height Sale price$1,149.99
Cognito 6-Inch Standard Lift Kit with Fox PS 2.0 IFP Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 6-Inch Standard Lift Kit with Fox PS 2.0 IFP Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD Sale price$4,402.99
Cognito Front Sway Bar for 20-25 Silverado/Sierra 2500HD/3500HD - Southern Diesel Supply
Cognito Motorsports
Cognito Front Sway Bar for 20-25 Silverado/Sierra 2500HD/3500HD Sale price$599.99
Cognito CV Front Driveline Kit For 7-9 Inch 10-12 Inch Lifts On 17-19 Silverado/Sierra 2500HD/3500HD Duramax - Southern Diesel Supply
Cognito Motorsports
Cognito CV Front Driveline Kit For 7-9 Inch 10-12 Inch Lifts On 17-19 Silverado/Sierra 2500HD/3500HD Duramax Sale price$699.99
Cognito Uniball SM Series Upper Control Arm Kit for 19-25 Silverado/Sierra 1500 2WD/4WD Including AT4, AT4X, Trail Boss, & ZR2 - Southern Diesel Supply
Cognito Motorsports
Cognito Uniball SM Series Upper Control Arm Kit for 19-25 Silverado/Sierra 1500 2WD/4WD Including AT4, AT4X, Trail Boss, & ZR2 Sale price$949.99
Cognito 4-Inch Performance Lift Kit with Fox PSRR Shocks 2.0 for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 4-Inch Performance Lift Kit with Fox PSRR Shocks 2.0 for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD Sale price$4,960.99
Cognito CV Front Driveline Kit For 4-6 Inch Lift-Duramax/ 4-12 Inch Lift-Gas On 17-19 Silverado/Sierra 2500/3500 - Southern Diesel Supply
Cognito Motorsports
Cognito CV Front Driveline Kit For 4-6 Inch Lift-Duramax/ 4-12 Inch Lift-Gas On 17-19 Silverado/Sierra 2500/3500 Sale price$699.99
Cognito CV Front Driveline Kit For 7-9 Inch 10-12 Inch Lifts On 01-16 Silverado/Sierra 2500HD/3500HD Duramax - Southern Diesel Supply
Cognito Motorsports
Cognito CV Front Driveline Kit For 7-9 Inch 10-12 Inch Lifts On 01-16 Silverado/Sierra 2500HD/3500HD Duramax Sale price$699.99
Cognito Forged Pitman Idler Arm Support Kit for 01-10 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Forged Pitman Idler Arm Support Kit for 01-10 Silverado/Sierra 2500/3500 2WD/4WD Sale price$259.99
Cognito 3-Inch Premier Leveling Kit with Fox PSRR 2.0 Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Premier Leveling Kit with Fox PSRR 2.0 Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$2,527.99

Not sure it fits your truck?

Our Wildwood, FL techs will confirm the right part for your build before you buy.

Call or Text (352) 722-5295

Parts and performance upgrades for every Duramax-powered Chevy and GMC, from the 2001 LB7 to the latest L5P, plus the 3.0L and 2.8L Duramax. Southern Diesel Supply is a working diesel shop, so we stock the parts we install every week: lift pumps, injectors, CP3 and CP4 pumps, turbos, Allison transmission parts, suspension and maintenance items.

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Need more fuel? See our AirDog lift pumps. Running a Cummins or Powerstroke instead? Shop Cummins parts or Powerstroke parts.