Introduction

The Chevrolet inline 6 was Chevy's main engine from 1929 through 1954. In 1929 it replaced their first 4 cylinder engine, the 171 cubic inch four. It was the base engine starting in 1955 when they added the small block V8 to the line up. the engine was finally 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. There was also a straight-6 derived 153 and 181 (Vortec 3000) straight-four cylinder engines. Basically a straight-6 with 2 cylinders cut off.