- 2013 Confirmed
New EXT color for 2013, promotional, available fall 2012; GM Authority, 2012-04 RPO Central report; no GM list was read for 2013.
GNX Confirmed
Documented applications
This page aggregates every documented appearance of GNX in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.