General Motors option code

Y99

Y99: a General Motors factory option code reused for more than one part across 1971–1991 and 3 models — 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.

3 models · 6 model years · 7 sources