WCW ✓ Factory-verified

GMC · Regular Production Option

LPO, cat-back performance exhaust, dark tips

Years 2027 Models 1 Factory citations 2

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Also documented for CadillacChevrolet

Documented applications

Sierra 1500 — Next-Generation (2027) →

• 2027 ✓ Factory-verified

  Pro, Elevation, AT4: not offered; AT4X, Denali, Denali Ultimate: O (ADI available); dealer-installed; not available at start of production; requires the Crew Cab short box and the L78 engine; not available with WBC

  ⛭ GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.99.

  ⛭ GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Related codes · mentioned in these notes

L78WBC

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