In January 1921 a General Motors management survey recommended that the Chevrolet Division be cancelled, but Alfred P. Sloan Jr. recommended that the division be saved and William S. Knudsen was made Vice President of Operations and performance improved.

[2] The Series FB was advertised as the FB-12 and FB-20 (roadster), FB-22 and FB-30 (coupe), FB-40 and FB-42 (sedan) and FB-32 and FB-50 (touring).

[3][4] The roadster was also sometimes known as the "Royal Mail" and the tourer as the "Baby Grand", but these names were officially dropped during 1919.

Available in four body styles; two-door roadster and coupe and four-door tourer and sedan.

All model years were powered by the same 224 cu in (3.7 L) 4-cylinder overhead valve engine, producing 37 hp (28 kW) @ 2000rpm, as used in the previous Series FA; this had been developed from the short-stroke 171 cu in (2.8 L) version with 24 hp (18 kW) used in the Series H before it.