This refers to a modification package designed for General Motors’ Sierra trucks manufactured between 2007 and 2013. The numerical values indicate the extent of the lowering, with ‘4’ representing a four-inch reduction in ride height at the front of the vehicle, and ‘6’ signifying a six-inch reduction at the rear. Such kits typically include components like lowering springs, spindles, shocks, and potentially other hardware needed to achieve the desired stance.
Implementing this modification offers several advantages. A lower center of gravity improves handling characteristics, enhancing stability and reducing body roll during cornering. Furthermore, it often yields an aesthetic improvement, providing a more aggressive and streamlined appearance. The practice of lowering trucks has become popular due to its visual impact and perceived performance benefits.