- 1998–2005 Factory-verified
1998 list prints AN0; the 1999 to 2005 lists print the letter O (ANO) with the same wording, and GM's other lists print AN0, the zero form.
AN0 Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of AN0 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.