Duramax Diesel Parts & Upgrades

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Cognito Enhancement Plate Kit for SM Series Compression Strut Kit for 11-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Enhancement Plate Kit for SM Series Compression Strut Kit for 11-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$229.99
Cognito CV Front Driveline Kit For 4-6 Inch Lift-Duramax/ 4-12 Inch Lift-Gas On 01-16 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 01-16 Silverado/Sierra 2500/3500 Sale price$699.99
Cognito 6-Inch Elite Lift Kit with Fox 2.5 Elite Performance Series Shocks For 19-25 Silverado/Sierra 1500 2WD/4WD Including AT4 and Trail Boss - Southern Diesel Supply
Cognito Motorsports
Cognito 6-Inch Elite Lift Kit with Fox 2.5 Elite Performance Series Shocks For 19-25 Silverado/Sierra 1500 2WD/4WD Including AT4 and Trail Boss Sale price$7,299.99
Cognito Economy Leveling Kit for 01-10 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Economy Leveling Kit for 01-10 Silverado/Sierra 2500/3500 2WD/4WD Sale price$159.99
Cognito Tubular Series LDG Traction Bar Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD with 6.0-9.0 Inch Rear Lift Height - Southern Diesel Supply
Cognito Motorsports
Cognito Tubular Series LDG Traction Bar Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD with 6.0-9.0 Inch Rear Lift Height Sale price$1,149.99
Cognito Front Sway Bar for 19-25 Silverado/Sierra 1500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Front Sway Bar for 19-25 Silverado/Sierra 1500 2WD/4WD Sale price$429.99
Cognito 8-Inch Elite Lift Kit with Fox 2.5 Elite Performance Series Shocks for 19-25 Silverado/Sierra 1500 2WD/ 4WD, Including AT4, AT4X, Trail Boss, & ZR2 - Southern Diesel Supply
Cognito Motorsports
Cognito 8-Inch Elite Lift Kit with Fox 2.5 Elite Performance Series Shocks for 19-25 Silverado/Sierra 1500 2WD/ 4WD, Including AT4, AT4X, Trail Boss, & ZR2 Sale price$9,852.99
Cognito 3-Inch Performance Leveling Kit with Fox PS 2.0 IFP Shocks for 11-19 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Performance Leveling Kit with Fox PS 2.0 IFP Shocks for 11-19 Silverado/Sierra 2500/3500 2WD/4WD Sale price$1,759.99
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$699.99
Cognito Tubular Series LDG Traction Bar Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD with 0-5.5 Inch Rear Lift Height - Southern Diesel Supply
Cognito Motorsports
Cognito Tubular Series LDG Traction Bar Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD with 0-5.5 Inch Rear Lift Height Sale price$1,149.99
Cognito 7-Inch Elite Lift Kit with Elka 2.5 Reservoir Shocks For 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 7-Inch Elite Lift Kit with Elka 2.5 Reservoir Shocks For 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$9,664.99
Cognito 3-Inch Premier Leveling Kit with Fox PSRR 2.0 Shocks for 11-19 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Premier Leveling Kit with Fox PSRR 2.0 Shocks for 11-19 Silverado/Sierra 2500/3500 2WD/4WD Sale price$2,527.99
Cognito CV Front Driveline For 7-9 Inch On 19-25 Silverado/Sierra 1500 - Southern Diesel Supply
Cognito Motorsports
Cognito CV Front Driveline For 7-9 Inch On 19-25 Silverado/Sierra 1500 Sale price$749.99
Cognito SM Series LDG Traction Bar Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD With 0-5.5 Inch Rear Lift Height - Southern Diesel Supply
Cognito Motorsports
Cognito SM Series LDG Traction Bar Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD With 0-5.5 Inch Rear Lift Height Sale price$1,749.99
Cognito CV Front Driveline For 4-6 Inch On 19-25 Silverado/Sierra 1500 - Southern Diesel Supply
Cognito Motorsports
Cognito CV Front Driveline For 4-6 Inch On 19-25 Silverado/Sierra 1500 Sale price$749.99
Cognito 7-Inch Premier Lift Kit with Elka 2.5 Reservoir Shocks For 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 7-Inch Premier Lift Kit with Elka 2.5 Reservoir Shocks For 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$8,504.99
Cognito SM Series LDG Traction Bar Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD with 6-9 Inch Rear Lift Height - Southern Diesel Supply
Cognito Motorsports
Cognito SM Series LDG Traction Bar Kit for 11-19 Silverado/Sierra 2500/3500 2WD/4WD with 6-9 Inch Rear Lift Height Sale price$1,749.99
Supersteer Idler Arm Support For 11-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Supersteer Idler Arm Support For 11-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$249.99
Cognito 4-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 4-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$5,288.99
Cognito SM Series Compression Struts for 11-19 Silverado/Sierra 2500/3500 2WD/4WD with 7-9 Inch / 10-12 Inch Lift Systems - Southern Diesel Supply
Cognito Motorsports
Cognito SM Series Compression Struts for 11-19 Silverado/Sierra 2500/3500 2WD/4WD with 7-9 Inch / 10-12 Inch Lift Systems Sale price$669.99
Cognito 4 Degree Rear Pinion Angle Shim Kit For 99-18 Silverado/Sierra 1500 2WD/4WD / 01-10 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 4 Degree Rear Pinion Angle Shim Kit For 99-18 Silverado/Sierra 1500 2WD/4WD / 01-10 Silverado/Sierra 2500/3500 2WD/4WD Sale price$69.99
Cognito 4-Inch Standard Lift Kit with Fox PS 2.0 IFP Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 4-Inch Standard Lift Kit with Fox PS 2.0 IFP Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$3,774.99
Cognito 12-Inch Elite Lift Kit with Elka 2.5 Reservoir Shocks For 11-19 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 12-Inch Elite Lift Kit with Elka 2.5 Reservoir Shocks For 11-19 Silverado/Sierra 2500/3500 2WD/4WD Sale price$10,918.99
Cognito Ball Joint SM Series Upper Control Arm Kit for 01-10 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Ball Joint SM Series Upper Control Arm Kit for 01-10 Silverado/Sierra 2500/3500 2WD/4WD Sale price$629.99

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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.