B-body

GM B platform
Overview
Manufacturer	General Motors
Production	1926–1996
Body and chassis
Class	Full-size car
Layout	FR layout
Chronology
Successor	GM H platform (FWD) (full-size) GM G platform (1995) (full-size) GM W platform (full-size) GM V platform (RWD) (for Chevrolet Caprice sold in the Middle East) GM Zeta Platform (for Chevrolet Caprice sold in both the Middle East & North America and Chevrolet SS for the RWD Impala SS)

The GM B platform' (also known asr GM B body), was General Motors' full-size rear-wheel drive automobile platform from 1926-1996. It was closely related to the original rear-wheel drive GM C and GM D platforms, and was used for convertibles, hardtops, coupés, sedans, and station wagons.

At approximately 12,960,000 across four marques not counting 1966 full-size Chevrolet station wagons (production of 1966 full-size Chevrolet station wagons is unknown but a good guess is about 150,000) the 1965-70 GM B platform is the fourth best selling automobile platform in history after the Volkswagen Beetle, Ford Model T and the Lada Riva.

Originally, the B platform was used for Buick and Oldsmobile products, with the first GM A platform for Chevrolet and Oakland, and the above GM C and D platforms devoted to Cadillac.

The B platform was used for the Pontiac Streamliner Torpedo and Streamliner, the Oldsmobile Series L, Series 70 and Series 88, the Buick Special and Century, the LaSalle Series 50 and the Cadillac Series 60, Series 61 and Series 63. The B platform became GM's base model platform in 1958, when all existing Chevrolet products were upgraded to the B platform.

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Wikipedia