The rotors equipped on your 2001-2004 GM Sierra/Silverado are the heart of its braking system, but the factory rotors aren't the best when pushed to their limit. A new set of aftermarket rotors for your GM 6.6L Duramax LB7 build can make all the difference in your truck's braking performance by reducing fade and improving it's overall consistency. Premium rotors are also a great way to dispel brake dust during heavy-duty driving conditions, keeping your wheels looking clean for longer. GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.