- 2013 Single-source
listed under Deletions on GM Authority's 2014 Yukon page (RPO Central; its Yukon, Yukon XL and Commercial Fleet lists), so last offered the year before; no factory list or order guide read for 2013; the page does not credit GM for its codes
GXH Single-source
Also documented for BuickCadillacChevrolet
Documented applications
This page aggregates every documented appearance of GXH in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.