High Quality Content by WIKIPEDIA articles! The Chevrolet inline 6 was Chevy's main engine from 1929 (when it replaced their first 4 cylinder engine, the 171 cubic inch four),through 1954, and was the base engine starting in 1955 when they added the small block V8 to the line up, it had finally been completely phased out by 1990 in North America, but Brazil held on to their fuel injected straight-6 through the 1998 model year. It was replaced by more modern V6 and four cylinder engines. Many popular cars and trucks, including the Chevrolet Camaro, Chevrolet Impala, and Chevrolet Suburban just to name a few, used the inline 6 as the base engine. Chevrolet didn't offer another inline 6 until the 2002 GM Atlas engine's debut in the Chevrolet TrailBlazer. Contrary to popular belief, this was not their first production 6. This article also coverers the straight-6 derived 153 and 181 (Vortec 3000) straight-four cylinder engines.