RB1 ✓ Factory-verified

GMC · Regular Production Option

Wheels, 18" (45.7 cm)

Years 2027 Models 1 Factory citations 2

Query this via API →

Also documented for ChevroletOldsmobilePontiac

Documented applications

Sierra HD — T1XX (2020–2027) →

• 2027 ✓ Factory-verified

  only in: 2500 HD; AT4X: included in the trim group, upgradeable; Pro, SLE, SLT, AT4, Denali, Denali Ultimate: not offered

  ⛭ GM factory document — 2027 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, p.18.

This page aggregates every documented appearance of RB1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.