LPO, mirror caps, black

Years 2019–20, 2022–27 Models 4 Factory citations 18

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Also described as LPO, painted body-color mirror capsLPO, mirror covers, painted

Also documented for Cadillac Chevrolet

Documented applications

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, Elevation 3VL, AT4, AT4X, Denali Ultimate: not offered; Elevation 3SB, Denali: O (ADI available); dealer-installed

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.86.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2025 Factory-verified

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.13.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.14.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.13.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.13.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.15.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.13.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation, Denali, Denali Ultimate: O

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.12.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.12.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.64.
GM factory document — 2026 gmc yukon denali fleet order guide, p.69.
GM factory document — 2027 gmc yukon fleet order guide, p.60.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation, Denali, Denali Ultimate: O

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.12.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.12.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.68.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.70.
GM factory document — 2027 gmc yukon xl fleet order guide, p.61.

This page aggregates every documented appearance of S4X in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.