LPO, rear wheelhouse liners

Years 2014, 2019–20, 2022–27 Models 3 Factory citations 11

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Also described as LPO, wheelhouse liners

Also documented for Chevrolet

Documented applications

Sierra HD — GMT900 (2007–2014)

2014 Factory-verified

dealer-installed; comes with the SLT version of PDD

GM factory document — 2014 gmc sierra 2500hd fleet order guide wayback, p.3.
GM factory document — 2014 gmc sierra 3500hd fleet order guide wayback, p.3.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

only in: 3500 HD pickup

GM factory document — 2025 gmc sierra 3500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 3500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra 3500 hd 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.

This page aggregates every documented appearance of S41 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.