Bolt-in raised transmission crossmember works on the 2000 - 2006 GM fullsize trucks with an automatic transmission. It will allow you to trim off the factory mounts that hang down below the frame and prevent you from laying out. This is a bolt-in crossmember that uses the factory bolts and bolting location. We also provide you with (2) replacement support brackets that can be welded in place to fully box in the crossmember frame mounts.