GMX ✓ Factory-verified

Chevrolet · Regular Production Option

Paint, Brimstone

Years 2017 Models 1 Factory citations 1

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Documented applications

Sonic — first generation (2012–2020) →

• 2017 ✓ Factory-verified

  5-door only, extra cost; GM Authority 2018 page says Brimstone was dropped for 2018

  ⛭ GM factory document — 2017 chevrolet sonic order guide copy gm authority, p.46.

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