In 1979, the Holley two-barrel carburetor became standard on all models. The front fascia was revised with a flat hood, no longer wrapping down to the bumper. New for 1979 was a large chrome grille with Chevrolet's "bow-tie" emblem and square headlights. A new air-injection system was introduced to improve catalytic-converter function at idle. An active passenger-restraint system was introduced in small numbers as an option which featured a lower hanging dashboard, automatic seatbelts, and a center-dash console. Chevette sales totaled more than 451,000 units — a figure that would rank it second only to Chevy's new Citation, which had a much longer model run (sales had started in April 1979). "Consumer Guide" testers managed "an honest 29 mpg in the city and 39 mpg on the highway". The 1980 rear fascia was revised with a squared-off hatch, wraparound taillights with combined, single-colored turn signals, and a round gas-filler door.