- 1998 Factory-verified
platform-list code; no source shows whether the Achieva offered it.
Y98 Factory-verified
Also documented for BuickChevroletPontiac
Documented applications
- 1998 Factory-verified
- 1998–1999 Factory-verified
This page aggregates every documented appearance of Y98 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.