LPO, Underbody Shield package, transfer case protection

Years 2016–19, 2023–27 Models 3 Factory citations 9

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Also described as LPO, AEV spec hot-stamped boron steel underbody shieldLPO, skid plates

Also documented for Chevrolet

Documented applications

Canyon — Third generation (VSS-T) (2023–2027)

2026–2027 Factory-verified

GM factory document — 2026 gmc canyon fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc canyon fleet order guide rpo codes, p.1.

Sierra — K2XX (2014–2019)

2016–2019 Factory-verified

GM factory document — 2016 gmc sierra 1500 fleet order guide wayback, p.4.
GM factory document — 2017 chevrolet sierra silverado electrical body builders manual service manual 2017 en us, p.30.
GM factory document — 2018 gmc sierra 1500 order guide copy gm authority, p.90.
GM factory document — 2019 gmc sierra 1500 limited double cab k2xx order guide copy gm authority, p.41.

Sierra — T1XX (2019–2026)

2023–2025 Factory-verified

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.16.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.14.

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