Feature Image: May 2023. 1971 Buick (Gran Sport)GS455 Convertible 7.72 mb 73%
Wouldn’t you really rather have a Buick? 1971’s advertising tag line for this GM American automobile maker.
The GS 455 was an option to the base GS during the 1971 and 1972 model years. The GM A-body platform was the base for many iconic American cars including Buick. Approximately 81 GS 455 Stage 1 convertibles were produced for the model year. Just as manufacturers were producing some of the most desirable muscle cars of all time the U.S. government required unleaded gasoline that reduced these machines’ power (compression). Due to these government mandates starting for 1971, the advertised power of the car’s 455ci V8 with a single four-barrel carburetor and factory-rated 345 horsepower and 460 lb-ft of torque dropped variously at installation. The GS 455 engine was the same basic big-block that had been introduced in the 1970 model year. The Stage 2 version of the 455 did not go much further than Stage 1 and there was about the same number produced as Stage 1 though aftermarket did take things further. GS buyers could choose between automatic or manual transmission. The Turbo Hydra-matic had an option of column-mounted lever or full-length center console. Manual was a 3- or 4-speed floor-shift stick. The 1971 Buick GS 455 convertible is one of the rarest of Buick muscle cars. Major standard equipment exclusive to the GS included dual exhausts, functional hood air scoops, and heavy duty springs, shocks and stabilizer bar. In 1971, total GS 2-Door Convertible production was 902 vehicles with a base MRSP of $3,476 ($27,726.29 in 2025 dollars). In 2025 the Buick GS 455 had an average resale price of $52, 250.
SOURCES: See – https://bringatrailer.com/listing/1971-buick-gs-9/ https://www.classic.com/m/buick/gran-sport/455/year-1971/
https://www.hemmings.com/stories/1971-72-buick-gs-455/ https://classiccarsbay.com/for-sale-1971-buick-gs-455-in-mooresville-north-carolina-49118 – retrieved August 30, 2025.
J. “Kelly” Flory, Jr., American Cars, 1966 to 1972, McFarland & Company, Inc. pp. 396-399.
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