- 2019 Factory-verified
only in: convertible;
21T Factory-verified
Documented applications
- 2014–2019 Factory-verified
only in: convertible; 2014, 2019: from GM order-guide copies (Corvette Action Center; 2019 also GM Authority)
This page aggregates every documented appearance of 21T in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.