Tires, 19 inch, all season

Years 2017 Models 1

Also documented for Buick Chevrolet

Documented applications

XTS — Epsilon II, enlarged (2013–2019)

2017 Confirmed

the 2018 list deletes it, replaced by RJZ (GM Authority 2018 XTS changes)

This page aggregates every documented appearance of Q2B in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.