- 2014 Factory-verified
extra charge; not with the base Sierra (1SA) or on Double Cab or Regular Cab.
GBN Factory-verified
Also described as Paint, White Diamond Tricoat
Also documented for BuickCadillacChevrolet
Documented applications
- 2015 Factory-verified
touch-up WA-800J; extra charge; not on SLE
- 2015 Factory-verified
extra charge; not on SLE; not in the 2016 guide
This page aggregates every documented appearance of GBN in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.