2001-2004 Duramax LB7 2500 & 3500 Parts & Accessories

Your classic LB7 Duramax truck may be no spring chicken, but these awesome diesels have more than few tricks up their sleeves that can be unlocked with the right performance parts from Tier One! We have all the parts and accessories for 2001-2004 Duramax LB7 trucks that you need to add a whole ton of power, improve performance, and add capability to your Silverado or Sierra HD build. We here at Tier One have everything from our very own built Duramax LB7 transmissions and transmission rebuild kits that can hold a ton more power and torque than stock, as well as Duramax LLY upgrades like Duramax LLY tuners, Duramax LLY cold air intakes, Duramax LLY exhaust kits, GM 2500 & 3500 leveling kits, GM 2500 & 3500 lift kits, and anything else you need to totally transform your Duramax LLY 2500 or 3500 and have it keeping up even the most modern diesel trucks. Check out our built Allison transmissions or our built 4L80E transmissions. If you don't see something you need, contact Tier One or call 602-399-5484!