N2N ✓ Factory-verified

GMC · Regular Production Option

Fuel tank, front and rear, 63.5 gallon (240 liters)

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: 3500 HD CC

  ⛭ GM factory document — 2025 gmc sierra 3500 hd cc fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 gmc sierra 3500 hd cc fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 gmc sierra 3500 hd cc fleet order guide rpo codes, p.1.

This page aggregates every documented appearance of N2N in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.