The 1971 model year saw significant changes to the Chevelle, including a new grille and a revised rear end. The SS 396 package was discontinued, replaced by the SS 350 package, which featured a 350-cubic-inch V8 engine. The 1972 model year saw the introduction of a new "optional" SS package, which featured a 350-cubic-inch V8 engine and a range of performance upgrades.

The 1969 and 1970 model years are often referred to as the "golden years" of the Chevelle. The 1969 model featured a completely redesigned exterior, with a new fastback body style and a distinctive "flying buttress" rear roofline. The SS 396 package was still available, but it was now joined by the even more powerful SS 396 396 cubic-inch engine, which produced 375 horsepower.

The 1970 model year saw the introduction of the LS6 454 engine, which produced a staggering 450 horsepower. This engine was only available in the SS 454 package, which also included a heavy-duty suspension and a unique hood with a functional air scoop.