2003-2010 6.6L Duramax

The 2003–2010 6.6L Duramax Kodiak/TopKick was designed for medium-duty commercial trucks, offering incredible torque and long-term reliability under heavy loads. Powering GM’s vocational lineup, this Duramax variant excels in demanding fleet and towing environments. Thoroughbred Diesel supplies everything from filters and injectors to turbo and maintenance parts to keep your Kodiak or TopKick running strong.

Our catalog of 2003–2010 Duramax Kodiak/TopKick parts includes everything from maintenance components to performance and reliability upgrades. Popular choices include Fleetguard and ACDelco filters for long service intervals, Industrial Injection fuel system parts, BD Diesel turbochargers, and FASS or AirDog lift pumps for consistent fueling under load. Many owners also choose PPE transmission coolers, ARP head studs, and MBRP exhaust components to improve longevity and towing performance. For maintenance, we offer injectors, gasket kits, sensors, and cooling system parts built to meet the demands of heavy-duty use.

Whether you’re running a vocational truck, tow rig, or service fleet, Thoroughbred Diesel is your source for GM 6.6L Duramax Kodiak and TopKick parts. We offer the brands professionals trust and the expertise you need to keep your truck performing at its best. Browse our categories, shop trusted brands, or explore featured products below — everything you need for your 2003–2010 Duramax Kodiak or TopKick is right here.

6.6L Duramax Kodiak & TopKick Injectors, Fuel System, Turbo & Engine Parts

The 2003–2010 GM 6.6L Duramax engines powering the Chevrolet Kodiak and GMC TopKick were built for serious work. These medium-duty trucks relied on the same proven Duramax platforms used in HD pickups — including the LB7, LLY, LBZ, and LMM — but tuned for higher torque and long-term reliability. Known for their strength, efficiency, and serviceability, the Kodiak and TopKick Duramax trucks are still trusted today in vocational, fleet, and towing applications. Thoroughbred Diesel carries a full range of parts and upgrades to keep your 6.6L Duramax-powered Kodiak or TopKick on the job and running strong.

• G&R Diesel Billet Aluminum Bottom Sump w/ Integrated Fuel Return System - Universal
• Beans Diesel-Bean Machine Multi Function Fuel Tank Sump Kit
• Bosch Fuel Control Actuator - 06-10 LBZ/LMM Duramax
• ARP Head Studs - 01-16 GM Duramax (ARP 2000 Material) - 230-4201
• Andersen Ultimate Connection (Lowered Flatbed Mount Toolbox Version)
• Pacbrake 24V Air Compressor W/Vertical Pump Head HP625 Series Pacbrake
• Blue Ox Towing Swaypro Weight Distributing Hitch, 1000 Lb. Clamp-On, 7 Hole Shank
• HSP Diesel RFAB Replacement 4.5 Inch Dry Air Filter
• HSP Diesel RFAB Replacement 4.5in Oiled Air Filter
• ISSPRO EV2 Fuel Pressure 0-30 PSI
• Stanadyne Performance Formula - 1/2 Gallon Bottle (CASE of 6 Bottles) - Treats 250gal of diesel fuel per bottle - 38566C
• Stanadyne Performance Formula - "One Shot" 8oz Bottle (CASE of 24 Bottles) - Treats 30gal of diesel fuel per bottle - 38564C
• Vibrant Performance T304 Stainless Steel 90 Degree Mandrel Bend, 5" O.D.
• Edge Products Gauge Pillar Adapter - 98004
• Edge EAS Street Diesel Kit
• Mel's Manufacturing 5" Polished 304 Stainless Steel Diesel Turn Out Exhaust Tip Clamp/Weld On
• Mishimoto Black Oil Catch Can - Universal - MMOCC-RB
• Bostech Fuel Injector Return Line - 2001-2004 GM Duramax LB7 6.6L
• Industrial Injection Injector Return Line Bolts 8pcs - 01-04 GM Duramax 6.6L LB7
• Merchant Automotive Turbo Exhaust V Band Clamp - 2004.5-2016 GM 6.6L Duramax LLY/LBZ/LMM/LML
• MAHLE Head Set (Without Head Gaskets) - 04.5-07 GM Duramax LLY/LBZ 6.6L
• Edge Back-Up Camera License Plate Mount for CTS3 Products - 98203
• Recon AR-15 Rifle Barrel 10" Aluminum Truck Antenna with 3-Pronged Threaded Flash Hider Barrel Tip - Black
• B&W Hitch Gooseneck OEM Ball and Chain Safety Kit (Fits GM/Ford/Nissan with Factory Puck System)