QCS ✓ Factory-verified

Cadillac · Regular Production Option

Tire, spare, T145/70R17

Years 2025 Models 1 Factory citations 2

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Also documented for Buick

Documented applications

XT4 — E2 (2019–2025) →

• 2025 ✓ Factory-verified

  Premium Luxury, Sport: O; included only with 4G7; replaces KTI

  ⛭ GM factory document — 2025 cadillac xt4 fleet order guide, p.24.

  ⛭ GM factory document — 2025 cadillac xt4 fleet order guide rpo codes, p.1.

Related codes · mentioned in these notes

4G7KTIO

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