LAS VEGAS – Chevrolet drives into the SEMA Show this week led by The Chevy Beast — a concept vision of the ultimate in high-performance desert running. Conceived to demonstrate the capability of Chevy trucks and Chevrolet Performance components, The Chevy Beast concept is a four-passenger off-roader that’s based on a modified Silverado chassis, wears a customized pickup body and is powered by a Chevrolet Performance LT4 650-horsepower supercharged crate engine.