- 2025–2027 Factory-verified
only in: 3500 HD pickup and 3500 HD CC; Pro, SLE, SLT: O; Denali, Denali Ultimate: included in the trim group, upgradeable; AT4: not offered
ZAE Factory-verified
Also documented for ChevroletPontiac
Documented applications
This page aggregates every documented appearance of ZAE in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.