SNO ✓ Factory-verified

GMC · Regular Production Option

LPO, hitch package, gooseneck ball and chain tiedown kit with case

Years 2025–27 Models 1 Factory citations 3

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Also documented for Chevrolet

Documented applications

Sierra HD — T1XX (2020–2027) →

• 2025–2027 ✓ Factory-verified

  only in: 2500 HD and 3500 HD pickup; dealer-installed; requires Z6A

  ⛭ 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.

Related codes · mentioned in these notes

Z6A

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