- 1998–2004 Factory-verified
the 1998–1999 lists include a leather shifter knob and require UK3
NK4 Factory-verified
Also documented for BuickCadillacChevroletPontiacSaturn
Documented applications
This page aggregates every documented appearance of NK4 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.