Information?? High quality chassis partseries products. Made with high strength steel tubing for superior strength and durability. Stable performance, reliable quality and long service life Uniform thickness, no blow holes, slag, cracks, tearing, or incomplete fusion. Measured by specialized inspection tools after welding to make sure assemble hole , bushings insert, and installation sizes are proper. Professional InstallerisHighly Recommended(No Instruction Included) Alignment Highly Recommended After InstallCompatibility Chart?? For 2017-2018 Cadillac XT5 V63.6L For 2020 GMC Acadia L42.0L For 2017-2020 GMC Acadia L42.5L For 2017-2020 GMC Acadia V63.6LPackage Content?? 1x Rear Driveshaft Prop Shaft Assembly,W/o Product Instruction??