On this page, you’ll find our collection of air intake parts and accessories for 2004 and 2005 Chevy diesel trucks. The 2004 -2005 6.6L LLY air intake system can give your diesel truck new life and get it running much smoother. By increasing the amount of oxygen that reaches your truck’s engine, this air intake system can improve your truck’s performance in multiple areas. The 2004 -2005 6.6L LLY air intake is a full system for your truck, but you can also find parts and filters on this page. We here at Norcal Diesel Performance want you to have everything you need to make your truck into the machine you’ve always wanted it to be.