H24 ✓ Factory-verified

GMC · Regular Production Option

Interior trim, Atmosphere/Brownstone, Forge perforated leather seating surfaces

Years 2023–27 Models 2 Factory citations 8

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Also described as Interior trim, leather, level 4, Atmosphere/Brownstone

Documented applications

Sierra HD — T1XX (2020–2027) →

• 2025–2027 ✓ Factory-verified

  Denali (5SA); bucket seats A50; the name matches the GM Authority 2026 Sierra HD interior colors page

  ⛭ GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.103.

  ⛭ GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.99.

  ⛭ GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.93.

Sierra — T1XX (2019–2026) →

• 2023–2026 ✓ Factory-verified

  the 2025–2026 guides: Forge perforated leather, Denali (5SA)

  ⛭ GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.11.

  ⛭ GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.13.

  ⛭ GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.11.

  ⛭ GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide, p.168.

  ⛭ GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide, p.85.

Related codes · mentioned in these notes

5SAA50

This page aggregates every documented appearance of H24 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.