- 2014 Factory-verified
only in: 3500 dual rear wheels
QZT Factory-verified
Also described as Tires, LT235/80R17E all-terrain
Also documented for Chevrolet
Documented applications
- 2015, 2019 Factory-verified
dual rear wheels; only in: 3500HD; 2015 marks: Sierra, SLE, SLT: O; 2019: GM's 2019 Sierra 3500HD order guide
- 2025–2026 Factory-verified
only in: 3500 HD pickup and 3500 HD CC
This page aggregates every documented appearance of QZT in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.