R5K ✓ Factory-verified

GMC · Regular Production Option

Wheels, 18" (45.7 cm), painted steel, silver

Years 2025, 2027 Models 1 Factory citations 2

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Also documented for Chevrolet

Documented applications

Sierra HD — T1XX (2020–2027) →

• 2025, 2027 ✓ Factory-verified

  only in: 3500 HD pickup and 3500 HD CC; the 2025 list prints "Wheels 18" painted steel"; the 2027 guides add a painted center cap

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

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

This page aggregates every documented appearance of R5K in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.