Lamp package, emergency vehicle, rear compartment lid

Years 1998–09, 2017, 2025–27 Models 6 Factory citations 21

Also described as Lamps, alternate flashing Red and Blue rear compartment lid warning (SEO)Lamps, trunk lid warning, LED, red and blue random flashingLamp package, emergency vehicle rear compartment lidLamps, alternating flashing Red and Blue rear compartment lid warning (SEO)

Documented applications

Blazer EV (2024–2027)

2025–2027 Factory-verified

only in: Police Package

GM factory document — 2025 chevrolet blazer ev police package fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet blazer ev police package fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet blazer ev police package fleet order guide rpo codes, p.1.

Caprice — Caprice PPV (2011–2017)

2017 Factory-verified

A

GM factory document — 2017 chevrolet caprice ppv order guide copy gm authority, p.5, p.10.

Impala — eighth generation (2000–2005)

2000–2005 Factory-verified

GM factory document — 2000 chevrolet impala rpo code list, p.1.
GM factory document — 2001 chevrolet impala rpo code list, p.1.
GM factory document — 2002 chevrolet impala rpo code list, p.1.
GM factory document — 2003 chevrolet impala rpo code list, p.1.
GM factory document — 2004 chevrolet impala rpo code list, p.1.
GM factory document — 2005 chevrolet impala rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Impala, p.43.
GM Heritage factory kit — 2004 Chevrolet Impala, p.30.

Impala — ninth generation (2006–2016)

2006–2009 Factory-verified

GM factory document — 2006 chevrolet impala rpo code list, p.1.
GM factory document — 2007 chevrolet impala rpo code list, p.1.
GM factory document — 2008 chevrolet impala rpo code list, p.1.
GM factory document — 2009 chevrolet impala rpo code list, p.1.

Lumina — second generation (1995–2001)

1998–1999 Factory-verified

GM factory document — 1998 chevrolet lumina rpo code list, p.1.
GM factory document — 1999 chevrolet lumina rpo code list, p.1.

Tahoe — T1XX (2021–2027)

2025–2027 Factory-verified

2027: police guides: O on both columns; only in: Police Package and Special Service models; visible when the liftgate is open; controlled by a momentary liftgate-mounted switch or a ground wire

GM factory document — 2025 chevrolet new tahoe police package and special service fleet order guide, p.9.
GM factory document — 2026 chevrolet tahoe police package and special service fleet order guide, p.9.
GM factory document — 2027 chevrolet tahoe police package and special service fleet order guide, p.9.

This page aggregates every documented appearance of T53 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.