Increase strength and reduce vibration on your 2007-2013 Chevy Silverado or GMC Sierra 1500 equipped with a BDS lift kit by installing auxiliary differential brackets. These auxiliary differential support brackets reinforce the factory rubber mounts that can yield excessive movement when higher torque loads are added with large tires. These support brackets significantly reduce a vibration that can be caused by this movement when running in 4wd at speed. These brackets are specifically designed to fit BDS 4" and 6" lift high clearance crossmembers.