After lifting your GM 2500HD/3500HD, the factory brake lines may fall short of accommodating the increased height. Our selection of extended-length brake lines is specifically designed for lifted suspensions, offering durable construction to ensure long-term reliability. Enhance stopping power on your truck to the next level by pairing your new brake lines with our selection ofBrake Rotors! 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.