Speakers, premium dual rear

Years 1983–92, 1994, 1998, 2005–09 Models 10 Factory citations 33

Also described as Premium dual rear speakersSpeaker system, 4 speakers, dual front and dual rearSpeaker system, 4 speakers, dual front and dual extended range rearSpeaker system, 7, customSpeakers, premiumSpeaker system, 4 speakers, extended rangeSpeakers, premium, dual rearSpeaker system, extended range, 4 speaker

Also documented for Buick Cadillac GMC

Documented applications

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

1983–1988 Factory-verified

included with UM6 and UX1

GM Heritage factory kit — 1983 Chevrolet S 10 Blazer, p.8.
GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.8.
GM Heritage factory kit — 1985 Chevrolet S 10 Blazer, p.30.
GM Heritage factory kit — 1986 Chevrolet S 10 Blazer, p.8.
GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.44.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.9.

Cavalier — first generation (1982–1987)

1984–1987 Factory-verified

1985–1987 with stereo radios only; the Celebrity doc reads U66 as a premium radio speaker system

GM Heritage factory kit — 1984 Chevrolet Cavalier, p.9.
GM Heritage factory kit — 1985 Chevrolet Cavalier, p.38.
GM Heritage factory kit — 1986 Chevrolet Cavalier, p.38.
GM Heritage factory kit — 1987 Chevrolet Cavalier, p.38.

Cavalier — second generation (1988–1994)

1988–1992, 1994 Factory-verified

standard; the first-generation doc reads U66 as premium dual rear speakers

GM Heritage factory kit — 1988 Chevrolet Cavalier, p.32.
GM Heritage factory kit — 1989 Chevrolet Cavalier, p.55.
GM Heritage factory kit — 1990 Chevrolet Cavalier, p.32.
GM Heritage factory kit — 1991 Chevrolet Cavalier, p.57.
GM Heritage factory kit — 1992 Chevrolet Cavalier, p.58.
GM Heritage factory kit — 1994 Chevrolet Cavalier, p.53.

Corsica — L-body (1987–1996)

1988 Factory-verified

included with UM6, UM7 and UX1; the 1988 Beretta page prints U65 for the same item; GM's 1998 lists read U66 as an extended range 4 speaker system

GM Heritage factory kit — 1988 Chevrolet Corsica, p.33.

Corvette — C6 (2005–2013)

2005–2009 Factory-verified

GM factory document — 2005 chevrolet corvette rpo code list, p.1.
GM factory document — 2006 chevrolet corvette rpo code list, p.1.
GM factory document — 2007 chevrolet corvette rpo code list, p.1.
GM factory document — 2008 chevrolet corvette rpo code list, p.1.
GM factory document — 2009 chevrolet corvette rpo code list, p.1.

Chevy Van — Second generation G-series (1983–1996)

1986, 1988, 1989 Factory-verified

GM Heritage factory kit — 1986 Chevrolet G Van, p.25.
GM Heritage factory kit — 1988 Chevrolet Vandura, p.23.
GM Heritage factory kit — 1989 Chevrolet G Van, p.17.

Metro — second generation (1998–2001)

1998 Factory-verified

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

Monte Carlo — fourth generation (1983–1988)

1986–1987 Factory-verified

included with UX1

GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.

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

1983, 1986–1988 Factory-verified

GM Heritage factory kit — 1983 Chevrolet S 10, p.30.
GM Heritage factory kit — 1986 Chevrolet S 10, p.17.
GM Heritage factory kit — 1987 Chevrolet S 10, p.23.
GM Heritage factory kit — 1988 Chevrolet S 10, p.20.

Tracker — First generation (1998)

1998 Factory-verified

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

This page aggregates every documented appearance of U66 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.