After lifting your GM 2500HD/3500HD, your factory brake lines may not be long enough to accommodate the added lift height. Our selection of brake lines includes extended length lines perfect for your lifted suspension, constructed durably to ensure long term reliability. Take your stopping power to the next level by pairing your new brake lines with our selection ofBrake Rotors! GM Duramax Fitments: 2011, 2012, 2013, 2014, 2015, 2016 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.