General Motors option code

I3

I3: a General Motors factory option code reused for more than one part across 1971–1976 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