Radio, AM/FM stereo, seek/scan, automatic reverse music search cassette, compact disc, automatic tone, clock, ETR

Years 1998–06 Models 8 Factory citations 23

Also described as Radio, AM/FM stereo, seek/scan, auto reverse music search cassette, CD, auto tone, clock, ETRRadio, AM/FM stereo, seek/scan, automatic reverse music search cassette, CD, automatic tone, clock, ETRRadio, AM/FM stereo, seek/scan, automatic reverse music search cassette, CD, auto tone, clock, ETRRadio, AM/FM stereo, seek/scan, cassette, automatic reverse, music search, CD, automatic tone, clock, ETRRadio, AM/FM stereo, seek and scan, auto reverse music search cassette, CD, auto tone, clock

Also documented for Cadillac Chevrolet GMC Oldsmobile Pontiac Saturn

Documented applications

Century — W-body (1997–2005)

1998–2003 Factory-verified

GM factory document — 1998 buick century rpo code list, p.1.
GM factory document — 1999 buick century rpo code list, p.1.
GM factory document — 2000 buick century rpo code list, p.1.
GM factory document — 2001 buick century rpo code list, p.1.
GM factory document — 2002 buick century rpo code list, p.1.
GM factory document — 2003 buick century rpo code list, p.1.

LeSabre — H-body (1992–1999)

1998–1999 Factory-verified

GM factory document — 1998 buick lesabre rpo code list, p.1.
GM factory document — 1999 buick lesabre rpo code list, p.1.

LeSabre — H-body (2000–2005)

2000–2005 Factory-verified

TriShield agrees on the meaning.

GM factory document — 2000 buick lesabre rpo code list, p.1.
GM factory document — 2005 buick lesabre rpo code list, p.1.

Lucerne — G-body (2006–2011)

2006 Factory-verified

TriShield agrees on the meaning.

GM factory document — 2006 buick lucerne rpo code list, p.1.

Park Avenue — G-body (1997–2005)

1999–2005 Factory-verified

The 2003-2005 lists print UPO (letter O) and "Stero"; the 1999-2002 lists and GM's other lists print UP0 (zero), which is the code. TriShield lists UP0 as an AM/FM stereo, seek/scan, auto reverse radio.

GM factory document — 1999 buick park avenue rpo code list, p.1.
GM factory document — 2003 buick park avenue rpo code list, p.1.
GM factory document — 2005 buick park avenue rpo code list, p.1.

Regal — W-body (1997–2004)

1998–2003 Factory-verified

GM factory document — 1998 buick regal rpo code list, p.1.
GM factory document — 1999 buick regal rpo code list, p.1.
GM factory document — 2000 buick regal rpo code list, p.1.
GM factory document — 2001 buick regal rpo code list, p.1.
GM factory document — 2002 buick regal rpo code list, p.1.
GM factory document — 2003 buick regal rpo code list, p.1.

Riviera — G-body (1995–1999)

1998–1999 Factory-verified

GM factory document — 1998 buick riviera rpo code list, p.1.
GM factory document — 1999 buick riviera rpo code list, p.1.

Skylark — N-body (1992–1998)

1998 Factory-verified

GM factory document — 1998 buick skylark rpo code list, p.1.

This page aggregates every documented appearance of UP0 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.