- 1989–1992 Single-source
3rdgenformula lists the hatch roof and a cassette radio in it; Firebird years: 3rdgenformula option pages 1989–1992
R6A Single-source
Also documented for Hummer
Documented applications
This page aggregates every documented appearance of R6A in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.