QBC ✓ Factory-verified

Cadillac · Regular Production Option

Tires, 245/45R18, all-season

Years 2025–26 Models 1 Factory citations 4

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Documented applications

CT5 — Alpha 2 (2020–2026) →

• 2025–2026 ✓ Factory-verified

  only in: CT5 (Premium Luxury, Sport); Premium Luxury: S; Sport: not available

  ⛭ GM factory document — 2025 cadillac ct5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 cadillac ct5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 cadillac ct5 fleet order guide, p.6.

  ⛭ GM factory document — 2026 cadillac ct5 fleet order guide, p.6.

Related codes · mentioned in these notes

CT5S

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