GM Duramax



It’s hard to beat the winning combination of a Duramax diesel engine paired with an Allison transmission, and Parleys Diesel Performance carries a full line of performance parts and upgrades for the Duramax in your Chevy Silverado or GMC Sierra pickup truck. Whether your’re towing a boat or camper, use your truck as a daily driver, or looking for real high end racing and pulling components, we’ve got the upgrades you need at Parleys Diesel Performance. Shop on-line or call us today to take your Duramax diesel performance to the next level. To see parts specifically for your GM Duramax diesel truck, choose your truck year and engine displacement.

2011-2015 6.6L Duramax LML Diesel Performance Upgrades

  • Chevy/GMC Duramax 6.6L LML Diesel Performance Tuners, Downloaders & Modules
  • Chevy/GMC Duramax 6.6L LML Diesel Exhaust Systems & Components
  • Chevy/GMC Duramax 6.6L LML Diesel Exhaust Stacks
  • Chevy/GMC Duramax 6.6L LML Diesel Cold Air Intake Systems
  • Chevy/GMC Duramax 6.6L LML Diesel Water-Methanol Injection Kits
  • Chevy/GMC Duramax 6.6L LML Diesel Head Studs & Main Studs
  • Chevy/GMC Duramax 6.6L LML Diesel Gauges & Pillar Pods
  • Chevy/GMC Duramax 6.6L LML Diesel Lift Pumps & Fuel Preporators
  • Chevy/GMC Duramax 6.6L LML Diesel Fuel Injection Pumps
  • Chevy/GMC Duramax 6.6L LML Diesel Differential Covers & Transmission Pans
  • Chevy/GMC Duramax 6.6L LML Diesel Turbo Upgrades
  • Chevy/GMC Duramax 6.6L LML Diesel Truck Accessories

2007.5-2010 6.6L Duramax LMM Diesel Performance Upgrades

  • Chevy/GMC Duramax 6.6L LMM Diesel Performance Tuners, Downloaders & Modules
  • Chevy/GMC Duramax 6.6L LMM Diesel Exhaust Systems & Components
  • Chevy/GMC Duramax 6.6L LMM Diesel Exhaust Stacks
  • Chevy/GMC Duramax 6.6L LMM Diesel Intercoolers
  • Chevy/GMC Duramax 6.6L LMM Diesel Injectors & Injector Nozzles
  • Chevy/GMC Duramax 6.6L LMM Diesel Cold Air Intake Systems
  • Chevy/GMC Duramax 6.6L LMM Diesel EGR-Delete Kits
  • Chevy/GMC Duramax 6.6L LMM Diesel Water-Methanol Injection Kits
  • Chevy/GMC Duramax 6.6L LMM Diesel Head Studs & Main Studs
  • Chevy/GMC Duramax 6.6L LMM Diesel Gauges & Pillar Pods
  • Chevy/GMC Duramax 6.6L LMM Diesel Lift Pumps & Fuel Preporators
  • Chevy/GMC Duramax 6.6L LMM Diesel Fuel Injection Pumps
  • Chevy/GMC Duramax 6.6L LMM Diesel Differential Covers & Transmission Pans
  • Chevy/GMC Duramax 6.6L LMM Diesel Turbo Upgrades
  • Chevy/GMC Duramax 6.6L LMM Diesel Truck Accessories

2006-2007 6.6L Duramax LLY/LBZ Diesel Performance Upgrades

  • Chevy/GMC Duramax 6.6L LBZ Diesel Performance Tuners, Downloaders & Modules
  • Chevy/GMC Duramax 6.6L LBZ Diesel Exhaust Systems & Components
  • Chevy/GMC Duramax 6.6L LBZ Diesel Exhaust Stacks
  • Chevy/GMC Duramax 6.6L LBZ Diesel Intercoolers
  • Chevy/GMC Duramax 6.6L LBZ Diesel Injectors & Injector Nozzles
  • Chevy/GMC Duramax 6.6L LBZ Diesel Cold Air Intake Systems
  • Chevy/GMC Duramax 6.6L LBZ Diesel Water-Methanol Injection Kits
  • Chevy/GMC Duramax 6.6L LBZ Diesel Head Studs & Main Studs
  • Chevy/GMC Duramax 6.6L LBZ Diesel EGR-Delete Kits
  • Chevy/GMC Duramax 6.6L LBZ Diesel Gauges & Pillar Pods
  • Chevy/GMC Duramax 6.6L LBZ Diesel Lift Pumps & Fuel Preporators
  • Chevy/GMC Duramax 6.6L LBZ Diesel Fuel Injection Pumps
  • Chevy/GMC Duramax 6.6L LBZ Diesel Differential Covers & Transmission Pans
  • Chevy/GMC Duramax 6.6L LBZ Diesel Turbo Upgrades
  • Chevy/GMC Duramax 6.6L LBZ Diesel Truck Accessories

2004.5-2005 6.6L Duramax LLY Diesel Performance Upgrades

  • Chevy/GMC Duramax 6.6L LLY Diesel Performance Tuners, Downloaders & Modules
  • Chevy/GMC Duramax 6.6L LLY Diesel Exhaust Systems & Components
  • Chevy/GMC Duramax 6.6L LLY Diesel Exhaust Stacks
  • Chevy/GMC Duramax 6.6L LLY Diesel Intercoolers
  • Chevy/GMC Duramax 6.6L LLY Diesel Injectors & Injector Nozzles
  • Chevy/GMC Duramax 6.6L LLY Diesel Cold Air Intake Systems
  • Chevy/GMC Duramax 6.6L LLY Diesel Water-Methanol Injection Kits
  • Chevy/GMC Duramax 6.6L LLY Diesel Head Studs & Main Studs
  • Chevy/GMC Duramax 6.6L LLY Diesel Gauges & Pillar Pods
  • Chevy/GMC Duramax 6.6L LLY Diesel Lift Pumps & Fuel Preporators
  • Chevy/GMC Duramax 6.6L LLY Diesel Fuel Injection Pumps
  • Chevy/GMC Duramax 6.6L LLY Diesel Differential Covers & Transmission Pans
  • Chevy/GMC Duramax 6.6L LLY Diesel Turbo Upgrades
  • Chevy/GMC Duramax 6.6L LLY Diesel Truck Accessories

2001-2004 6.6L Duramax LB7 Diesel Performance Upgrades

  • Chevy/GMC Duramax 6.6L LB7 Diesel Performance Tuners, Downloaders & Modules
  • Chevy/GMC Duramax 6.6L LB7 Diesel Exhaust Systems & Components
  • Chevy/GMC Duramax 6.6L LB7 Diesel Exhaust Stacks
  • Chevy/GMC Duramax 6.6L LB7 Diesel Intercoolers
  • Chevy/GMC Duramax 6.6L LB7 Diesel Injectors & Injector Nozzles
  • Chevy/GMC Duramax 6.6L LB7 Diesel Cold Air Intake Systems
  • Chevy/GMC Duramax 6.6L LB7 Diesel Water-Methanol Injection Kits
  • Chevy/GMC Duramax 6.6L LB7 Diesel Head Studs & Main Studs
  • Chevy/GMC Duramax 6.6L LB7 Diesel Gauges & Pillar Pods
  • Chevy/GMC Duramax 6.6L LB7 Diesel Lift Pumps & Fuel Preporators
  • Chevy/GMC Duramax 6.6L LB7 Diesel Fuel Injection Pumps
  • Chevy/GMC Duramax 6.6L LB7 Diesel Differential Covers & Transmission Pans
  • Chevy/GMC Duramax 6.6L LB7 Diesel Turbo Upgrades
  • Chevy/GMC Duramax 6.6L LB7 Diesel Truck Accessories