General Motors option code

BS1

BS1: a General Motors factory option code reused for more than one part across 1975–1981 and 1 model — see the table for what it named each year, with installs and price where a source states them.

General Motors reused this code for more than one part over the years — read the "as named that year" column for what it meant on each row rather than assuming one meaning throughout.

1 model · 6 model years · 6 sources

Brochure spread of 1975 Firebirds: a red Formula and silver Trans Am at night, a yellow Esprit, an orange Firebird, a dash and bucket-seat interiors
1975 Pontiac Firebird line: Formula and Trans Am, with interiors (1975 Pontiac full-line brochure)

Every sourced appearance

Year Model As named that year Price Installs
1975 Pontiac Firebird and Trans Am Added Acoustical Insulation (sales code 584) RPO/UPC $20 Unknown
1976 Pontiac Firebird and Trans Am Added Acoustical Insulation (sales code 521) RPO/UPC $25 Unknown
1977 Pontiac Firebird and Trans Am Added Acoustical Insulation RPO/UPC $27 Unknown
1978 Pontiac Firebird and Trans Am Insulation, Additional Accoustical RPO/UPC $29 Unknown
1980 Pontiac Firebird and Trans Am Insulation, Additional Accoustical RPO/UPC $34 Unknown
1981 Pontiac Firebird and Trans Am Insulation, Additional Acoustical RPO/UPC $36 Unknown

Every row traces to the source it links from on that model's own year page; this table only collects them in one place.