T4Y ✓ Factory-verified

Buick · Regular Production Option

Lamps, front park and cornering

Years 2025–27 Models 1 Factory citations 3

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Also documented for Cadillac

Documented applications

Enclave — VSS-S (2025–2027) →

• 2025–2027 ✓ Factory-verified

  Preferred, Sport Touring: not offered; Avenir: S

  ⛭ GM factory document — 2025 buick all new enclave fleet order guide, p.5.

  ⛭ GM factory document — 2026 buick enclave fleet order guide, p.5.

  ⛭ GM factory document — 2027 buick enclave fleet order guide, p.6.

This page aggregates every documented appearance of T4Y in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.