Skid plate, transfer case

Years 2023–27 Models 4 Factory citations 17

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Also described as Skid plates, transfer case, stamped steel

Also documented for Chevrolet

Documented applications

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

2024–2027 Factory-verified

GM factory document — 2024 gmc 24 canyon electrical body builder manual 2023oct04, p.12.
GM factory document — 2025 gmc canyon fleet order guide rpo codes, p.1.
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 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, Elevation, AT4, Denali, Denali Ultimate: not offered; AT4X: O; AEV hot-stamped boron steel

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.97.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra HD — T1XX (2020–2027)

2024–2027 Factory-verified

only in: 2500 HD; 2024: GM Authority 2024 changes page; AT4X: O; Pro, SLE, SLT, AT4, Denali, Denali Ultimate: not offered

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.97.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.93.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.87.

Sierra — T1XX (2019–2026)

2023–2026 Factory-verified

GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.12.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.14.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.12.
GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

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