Parts & Accessories For 2004.5-2005 GM Trucks with 6.6 Duramax LLY Engines

Videos for 2004.5-2005 Chevy/GMC Trucks with 6.6L LLY Duramax Engines



2004.5-2005 Chevy Silverado & GMC Sierra 2500HD/3500HD with 6.6 LLY Duramax Engine 

XDP offers a large array of aftermarket parts, stock replacements, and accessories for your 2004.5-2005 Chevrolet Silverado or GMC Sierra 2500/3500 With 6.6L Duramax LLY diesel engine. XDP carries the parts you need to maintain, repair, and upgrade your truck.

Maintain Your 6.6 LLY Diesel

  • Engine Oil & Filters - By changing the oil on a regular basis and adhering to the manufacturer's recommended schedule, you can help your engine last longer. Purchase products from leading manufacturers like as Lucas Oil, Hot Shot's Secret, and Royal Purple.
  • Air Filters - Replace the clogged air filter in your engine with the factory drop-in and high-flow aftermarket replacement filters K&N, AEM, and AFE.
  • Fuel Filters - Select aftermarket or factory replacement filters to protect the fuel system.   
  • Coolant - High-quality coolants like Evans Waterless Engine Coolant, Mishimoto, and Hot Shot's Secret will help you maintain your cooling system. 

Common Repair Parts 

  • Fuel Filter Housing - Merchant Automotive and Racor products are available to fix or replace your leaking fuel filter housing.  
  • Crank Pin Kit - The balancer on the crankshaft's snout is known to spin when the factory dowel pin shears off. Add the XDP Crankshaft Dowel Pin Kit XD33 to prevent this from happening.
  • Tie Rods - Heavy loads and large wheels are known to cause extra stress in the OEM tie rods, making them prone to snap. Fix or replace the tie rods with stronger tie rods or tie sleeves from BD-Power, PPE, Moog, and Cognito.

Popular Upgrades  

  • Cold Air Kit - Intake systems from S&B, Banks Power, AFE, and other manufacturers can improve the airflow into your Duramax.  
  • Tuner - Use Edge, Superchips, and Banks Power programmers and modules to boost horsepower and torque.
  • Exhaust - Use an MBRP, Banks Power, or AFE 4" or 5" exhaust system to lower back pressure in your truck.  
  • Lift Pump - Adding a lift pump to your truck can enhance fuel delivery as Duramax engines did not come with one from the factory. XDP has lift pumps from leading manufacturers such as FASS and AirDog.  

Popular Accessories  

  • Tonneau Cover - Covers from Access, BAK, and Bestop will keep items in your truck's bed safe and dry.
  • Floor Liners - WeatherTech and Husky Liners will keep your truck's flooring clean.  
  • Running Boards - Nerf bars from companies like AMP Research and N-Fab make it easy to get in and out of your truck.

Lift & Leveling Kits 

  • Lift Kits - Use kits from ReadyLift, Daystar, Rough Country, and other companies to install taller tires and increase ground clearance.  
  • Leveling Kits - With kits from Cognito, Tuff Country, and Kryptonite, you can give your truck a leveled stance.  

Appearance Upgrades 

  • Headlights/Tail Lights - Upgrade the appearance of your truck with headlights and taillights from Spyder, Anzo, and other brands.  
  • Wheels - Use wheels from DDC Wheels and Fuel Off-Road to make your truck stand out from the pack.

Towing/Hauling Products  

  • Hitches - Choose from drop hitches, fifth wheel, and gooseneck options to find the ideal hitch for your needs.  
  • Air Bags & Load Support - Air Lift, Timbren, Firestone, and other items provide increased stability and confidence when towing.
Find the leading brands for your 2004.5 or 2005 Chevy Silverado or GMC Sierra. XDP has everything you need, including aftermarket upgrades and original equipment parts.


Attention: If you have a GM Duramax, please verify your engine type before ordering any product. Many of the products we offer are not interchangeable with all Duramax engine types. To Verify: Check the 8th digit in the VIN number:

VIN Code 1 - LB7 (2001-2004)
VIN Code 2 - LLY (2004.5-2006)
VIN Code D - LBZ (2006-2007)
VIN Code 6 - LMM (2007.5-2010)
VIN Code 8 - LML (2011-2016)