Radio, AM/FM stereo, clock, ETR

Years 1983–85, 1998–02 Models 13 Factory citations 24

Also described as AM/FM stereo radio with clock, ETR, minimum featureRadio, AM/FM stereoRadio, AM/FM stereo with clockRadio, AM/FM stereo, seek/scan, clock (European frequencies)Radio, AM/FM stereo, seek/scan, clock, ETR, European frequencies

Also documented for Cadillac GMC Hummer

Documented applications

S-10 Blazer — First generation (1983–1994)

1985 Factory-verified

GM's later lists use UL1 for a European frequency radio

GM Heritage factory kit — 1985 Chevrolet S 10 Blazer, p.31.

Cavalier — first generation (1982–1987)

1984 Factory-verified

the 1985 line prints ULT, so 1985 is left out

GM Heritage factory kit — 1984 Chevrolet Cavalier, p.10.

Celebrity — A-body (1982–1990)

1984 Factory-verified

Requires the separate clock option; 1985 is not claimed: no dated page of that year prints the code as an entry of its own

GM Heritage factory kit — 1984 Chevrolet Celebrity, p.42.

Citation — X-body (1983–1985)

1985 Factory-verified

GM Heritage factory kit — 1985 Chevrolet Citation, p.34.

Metro — second generation (1998–2001)

1998–1999 Factory-verified

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

Prizm — third generation (1998–2002)

1998–1999 Factory-verified

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

S-10 pickup — First generation (1982–1993)

1983, 1985 Factory-verified

1983 from the U66 speaker requirement remark; GM's later lists use UL1 for a European frequency radio

GM Heritage factory kit — 1983 Chevrolet S 10, p.30.
GM Heritage factory kit — 1985 Chevrolet S 10, p.24.

Silverado — GMT800 (1999–2007)

1999–2001 Factory-verified

GM factory document — 1999 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM Heritage factory kit — 2001 Chevrolet Silverado, p.57.

Silverado HD — GMT800 (2001–2007)

2001, 2002 Factory-verified

years from Heritage kit pages, not in GM’s service list of that year: 2002 (kit list)

GM factory document — 2001 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM Heritage factory kit — 2001 Chevrolet Silverado HD, p.63.
GM Heritage factory kit — 2002 Chevrolet Silverado HD, p.42.

Suburban — GMT800 (2000–2006)

2000–2001 Factory-verified

the 2000 list adds that it is the base radio on all models for European export and requires UL2

GM factory document — 2000 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet chevy suburban 2wd rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Suburban, p.48.
GM Heritage factory kit — 2001 Chevrolet Suburban, p.52.

Tahoe — GMT800 (2000–2006)

2000–2001 Factory-verified

the 2000 list adds that it is the base radio on all models for European export and requires UL2

GM factory document — 2000 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet tahoe 2wd rpo code list, p.1.

Tracker — First generation (1998)

1998 Factory-verified

GM factory document — 1998 chevrolet tracker 2wd rpo code list, p.1.

Tracker — Second generation (1999–2004)

1999 Factory-verified

GM factory document — 1999 chevrolet tracker 2wd rpo code list, p.1.

This page aggregates every documented appearance of UL1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.