B9Q Factory-verified

Cadillac · Regular Production Option

Model conversion, hearse

Years 1998–09, 2016–17, 2025–27 Models 8 Factory citations 17

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Also described as Coachbuilder, funeral hearsePackage, XTS Professional, coachbuilder funeral coach

Documented applications

DeVille — G-body (2000–2005)

2000–2005 Factory-verified

GM factory document — 2000 cadillac deville rpo code list, p.1.
GM factory document — 2005 cadillac deville rpo code list, p.1.

DeVille — K-body (1994–1999)

1998–1999 Factory-verified

GM factory document — 1998 cadillac deville rpo code list, p.1.
GM factory document — 1999 cadillac deville rpo code list, p.1.

DTS — G-body (2006–2011)

2006–2009 Factory-verified

GM factory document — 2006 cadillac dts rpo code list, p.1.
GM factory document — 2009 cadillac dts rpo code list, p.1.

Eldorado — E-body (1992–2002)

1998–1999 Factory-verified

the 1998–1999 lists are the DeVille's; may be DeVille equipment

GM factory document — 1998 cadillac eldorado rpo code list, p.1.
GM factory document — 1999 cadillac eldorado rpo code list, p.1.

Lyriq — BEV3 (2023–2027)

2027 Factory-verified

only in: Professional Vehicle

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

Seville — G-body (1998–2004)

1998–1999 Factory-verified

the 1998 list is word for word the 1998 DeVille and Eldorado lists, so this may be DeVille equipment; the 1999 Seville list also prints it

GM factory document — 1998 cadillac seville rpo code list, p.1.
GM factory document — 1999 cadillac seville rpo code list, p.1.

XT5 — C1XX (2017–2026)

2025–2026 Factory-verified

only in: the XT5 Professional Vehicles guides (Luxury 1SA, 1SB)

GM factory document — 2025 cadillac xt5 professional vehicles fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac xt5 professional vehicles fleet order guide rpo codes, p.1.
GM factory document — 2025 cadillac xt5 professional vehicles fleet order guide, p.7.
GM factory document — 2025 cadillac xt5 professional vehicles fleet order guide, p.14.
GM factory document — 2026 cadillac xt5 professional vehicles fleet order guide, p.6.
GM factory document — 2026 cadillac xt5 professional vehicles fleet order guide, p.13.

XTS — Epsilon II, enlarged (2013–2019)

2016–2017 Single-source

only in: XTS Professional; incomplete chassis for a coachbuilder; 2017: CUE with navigation (IO6) added, 1SH group (GM Authority 2017 XTS Professional changes); 2016: GM Authority 2016 XTS Professional changes, which prints the code on its model list; the 2014 and 2015 Professional articles print the same code as BQ9 in one line

This page aggregates every documented appearance of B9Q in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.