Trim group, Custom

Years 2022–27 Models 3 Factory citations 11

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Also described as Package, CX option 1

Also documented for Buick

Documented applications

Silverado 1500 — Fifth generation (2027)

2027 Factory-verified

GM factory document — 2027 chevrolet next generation silverado 1500 retail and fleet fleet order guide, p.1.

Silverado HD (T1XX, 2020–2027)

2023, 2025–2027 Factory-verified

only in: 2500 HD; Custom: available on Crew Cab C*20*43 and Double Cab C*20*53 models; 2023 Upfitter list prints "Package" with the option number

GM factory document — 2023 chevrolet 23silverado 2500 3500hd electrical body builder sm en us 2022oct12, p.9.
GM factory document — 2025 chevrolet silverado 2500 hd retail and fleet fleet order guide, p.1.
GM factory document — 2026 chevrolet silverado 2500 hd retail and fleet fleet order guide, p.1.
GM factory document — 2027 chevrolet silverado 2500 hd retail and fleet fleet order guide, p.1.

Silverado — T1XX (2019–2026)

2022–2026 Factory-verified

trim group printed under the Custom heading of the guides;

GM factory document — 2022 chevrolet 22 silverado 1500 new electrical body builder 042822, p.9.
GM factory document — 2023 chevrolet 23 silverado 1500 electrical body builder sm en us 2022oct24, p.9.
GM factory document — 2024 chevrolet 24 silverado1500 electrical body builder 2023nov29, p.10.
GM factory document — 2025 chevrolet silverado 1500 retail and fleet fleet order guide, p.1.
GM factory document — 2025 chevrolet silverado 1500 retail and fleet fleet order guide, p.217.
GM factory document — 2026 chevrolet silverado 1500 retail and fleet fleet order guide, p.100.

This page aggregates every documented appearance of 1CX in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.