SHH ✓ Factory-verified

GMC · Regular Production Option

LPO, 20" (50.8 cm) high gloss black painted wheels

Years 2025–27 Models 1 Factory citations 3

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Also documented for CadillacChevrolet

Documented applications

Sierra HD — T1XX (2020–2027) →

• 2025–2027 ✓ Factory-verified

  only in: 2500 HD and 3500 HD pickup

  ⛭ 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.

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