RUK ✓ Factory-verified

Cadillac · Regular Production Option

Wheels, 21" (53.3 cm) multi-spoke alloy with diamond cut/dark Android painted pockets

Years 2014, 2025 Models 2 Factory citations 3

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Also described as Wheels, 18 x 8.5 front and 18 x 9 rear, premium multi-coat painted

Documented applications

CTS — Sigma II (2008–2015) →

• 2014 ✓ Factory-verified

  CTS Coupe, Performance: S

  ⛭ GM factory document — 2014 cadillac cts coupe and cts v coupe fleet order guide wayback, p.2.

XT6 — C1XX (2020–2025) →

• 2025 ✓ Factory-verified

  Sport: O

  ⛭ GM factory document — 2025 cadillac xt6 fleet order guide, p.17.

  ⛭ GM factory document — 2025 cadillac xt6 fleet order guide, p.64.

Related codes · mentioned in these notes

OS

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