LPO, illuminated cargo sill plate

Years 2017, 2023, 2025–27 Models 5 Factory citations 14

Also described as LPO, Trunk sill plate, illuminatedLiftgate sill plate, illuminated (LPO)LPO, sill plate, rear cargo, illuminated

Also documented for Chevrolet GMC

Documented applications

CT6 — Omega (2016–2020)

2017 Factory-verified

dealer-installed

GM factory document — 2017 cadillac ct6 fleet order guide wayback, p.2.

Escalade — T1XX, 5th gen (2021–2027)

2023, 2025–2027 Factory-verified

2027: O on all trims

GM factory document — 2023 cadillac 23 escalade escalade esv electrical body builder sm en us 2022oct25, p.9.
GM factory document — 2025 cadillac new escalade escalade v fleet order guide, p.13.
GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.15.

XT4 — E2 (2019–2025)

2025 Factory-verified

Premium Luxury, Sport: O

GM factory document — 2025 cadillac xt4 fleet order guide, p.9.
GM factory document — 2025 cadillac xt4 fleet order guide rpo codes, p.1.

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.12.
GM factory document — 2025 cadillac xt5 fleet order guide, p.23.
GM factory document — 2026 cadillac xt5 fleet order guide, p.13.
GM factory document — 2026 cadillac xt5 fleet order guide, p.23.

XT6 — C1XX (2020–2025)

2025 Factory-verified

All trims: O

GM factory document — 2025 cadillac xt6 fleet order guide, p.13.
GM factory document — 2025 cadillac xt6 fleet order guide, p.62.

This page aggregates every documented appearance of 5RU in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.