Advanced Automotive Technologies (AAT) was a U.S. specialty coachbuilder and prototype studio based in Rochester Hills, Michigan. Founded in 1988 by former GM designer Steve Pasteiner, it operated as a low-volume constructor of custom bodies and concept cars while offering contract design and prototyping services. AAT was best known for the 1953/2003 Commemorative Edition Corvette, a limited-production conversion launched in the early 2000s on…