S3I ✓ Factory-verified

Cadillac · Regular Production Option

LPO, puddle lamps, Cadillac crest

Years 2021, 2023–27 Models 7 Factory citations 19

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Also described as LPO, puddle lampsPuddle lamps with Cadillac crest (LPO)LPO, Perimeter illumination

Also documented for BuickChevroletGMC

Documented applications

Escalade IQ — Ultium BEV (2025–2027) →

• 2025–2027 ✓ Factory-verified
  ⛭ GM factory document — 2025 cadillac all electric escalade iq fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 cadillac all electric escalade iql fleet order guide rpo codes, p.1.

Escalade — T1XX, 5th gen (2021–2027) →

• 2021, 2023–2027 ✓ Factory-verified

  2027: Luxury, Sport: O; Platinum Luxury, Platinum Sport, V-Series: S; GM Authority for 2021, 2024

  ⛭ GM factory document — 2023 cadillac 23 escalade escalade esv electrical body builder sm en us 2022oct25, p.12.

  ⛭ GM factory document — 2025 cadillac new escalade escalade v fleet order guide, p.6.

  ⛭ GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.8.

Lyriq — BEV3 (2023–2027) →

• 2025–2027 ✓ Factory-verified

  the 2025 list reads Puddle lamps, Cadillac crest

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

  ⛭ GM factory document — 2027 cadillac all electric lyriq lyriq v fleet order guide rpo codes, p.1.

Optiq — BEV3 (2025–2027) →

• 2025–2027 ✓ Factory-verified
  ⛭ GM factory document — 2025 cadillac all electric optiq fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 cadillac all electric optiq optiq v fleet order guide rpo codes, p.1.

Vistiq — BEV3 (2026–2027) →

• 2026–2027 ✓ Factory-verified
  ⛭ GM factory document — 2026 cadillac all electric vistiq fleet order guide, p.56.

  ⛭ GM factory document — 2027 cadillac all electric vistiq fleet order guide, p.56.

XT5 — C1XX (2017–2026) →

• 2025–2026 ✓ Factory-verified
  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide, p.15.

  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide, p.30.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide, p.15.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide, p.32.

XT6 — C1XX (2020–2025) →

• 2025 ✓ Factory-verified

  All trims: O

  ⛭ GM factory document — 2025 cadillac xt6 fleet order guide, p.16.

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

Related codes · mentioned in these notes

OSV

This page aggregates every documented appearance of S3I in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.