- 1971–1976 Single-source
Riviera
C61 Factory-verified
Also described as Automatic climate control A/C (RPO)
Also documented for ChevroletOldsmobilePontiac
Documented applications
- 1998–1999 Factory-verified
- 1998 Factory-verified
This page aggregates every documented appearance of C61 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.