The Pontiac Bonneville is a model line of full-size or mid-size front-engine rear drive cars manufactured and marketed by Pontiac from 1957 until 2005, with a hiatus for model years 1982-1986. 
The Bonneville (marketed as the Parisienne in Canada until 1981), and its platform partner, the Grand Ville, are some of the largest Pontiacs ever built; in station wagon body styles they reached just over 230 inches (5.8 m) long, and at 5,000 pounds (2,300 kg) and more were also some of the heaviest cars produced at the time.
The Bonneville nameplate was introduced as a limited production performance convertible during the 1957 model year, its name taken from the Bonneville Salt Flats in Utah — an early site of US auto racing and numerous world's land speed record records, itself named after U.S. Army officer Benjamin Bonneville.
The Bonneville name first appeared in 1954 on a pair of bubble-topped GM Motorama concept cars called the Bonneville Special, sharing an appearance with the Chevrolet Corvette. It was also the beginning of a new tradition of Pontiac vehicles using French words for model names.
It entered the production lineup as a high-performance, fuel-injected luxury convertible version of the Star Chief in 1957, and was loaded with every available option as standard equipment to include leather upholstery, power adjustable front seat, power windows, power steering, power brakes and power convertible top with the exception of air conditioning and a fashionable for the time continental kit.
Standard only for the Bonneville was Pontiac's first-ever fuel injection system. A mechanical system built by Rochester, it was similar in principle, but not identical, to the contemporary Chevrolet Bel Air installed with the Rochester Ramjet continuous mechanical fuel injection(closed-loop). Pontiac did not release official power ratings for this engine, which had only been introduced earlier in 1955 replacing the flathead straight eight, saying only that it had more than 300 hp (224 kW). Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy.
This put the Bonneville in a Cadillac-like price range of US$5,782 ($62,725 in 2023 dollars - more than double the base price of the Chieftain on which it was built, with the result being a fully equipped Bonneville could cost more than the longer, entry-level Cadillac Series 62. Only 630 units were produced that first year, all of them fuel-injected, making it one of the most collectible Pontiacs of all time and was introduced to compete with the Chrysler 300C. The following year it became a separate model, and it would endure until 2005 as the division's top-of-the-line model.