Trim group, Colorado ZR2, 4WD

Years 2019–20, 2023–27 Models 2 Factory citations 5

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Also described as Equipment group, ZR2

Documented applications

Colorado — Second generation (GMT31XX) (2015–2022)

2019–2020 Single-source

4WD only; from GM Authority's 2019 Colorado page and GM Authority's 2020 Colorado page (trim levels); the 2018 GM guide prints the code only with a footnote digit

Colorado — Third generation (2023–2027)

2023–2027 Factory-verified

GM fleet model 14H43; the upfitter lists name it package ZR option 4

GM factory document — 2023 chevrolet 23colorado electrical body builder, p.9.
GM factory document — 2024 chevrolet 24colorado electrical body builder manual 18272478 2023oct09, p.10.
GM factory document — 2025 chevrolet colorado fleet order guide, p.1.
GM factory document — 2026 chevrolet colorado fleet order guide, p.1.
GM factory document — 2027 chevrolet colorado fleet order guide, p.1.

This page aggregates every documented appearance of 4ZR in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.