Trim group, Work Truck, standard range

Years 2019–20, 2023–27 Models 3 Factory citations 10

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Also described as Equipment group, Work Truck, 4WDTrim group, Colorado Work Truck, 4WD

Documented applications

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

2019–2020 Single-source

from GM Authority's 2019 Colorado page and GM Authority's 2020 Colorado page (trim levels); the 2015 and 2018 GM guides print the code only with a footnote digit

Colorado — Third generation (2023–2027)

2023–2027 Factory-verified

GM fleet model 14C43; the upfitter lists name it package WT 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.

Silverado EV — BT1 (2024–2027)

2024, 2026–2027 Factory-verified

the 2024 capture lists 4WT under Work Truck without a range name; the 2026 and 2027 guides give standard range; NICB lists Work Truck (4WT) for 2024

GM factory document — 2024 chevrolet silverado ev fleet fleet order guide wayback, p.1.
GM factory document — 2026 chevrolet silverado ev fleet order guide, p.1.
GM factory document — 2026 chevrolet silverado ev fleet order guide, p.63.
GM factory document — 2027 chevrolet silverado ev fleet order guide, p.1.
GM factory document — 2027 chevrolet silverado ev fleet order guide, p.52.

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