Speakers, dual rear

Years 1985–87 Models 7 Factory citations 10

Also described as Speakers, dual rear (four speaker system)Dual rear speakersDual front coaxial and dual rear standard-range speakers

Documented applications

Camaro — Gen 3 (1982–1992)

1985 Factory-verified

not available with UL5

GM Heritage factory kit — 1985 Chevrolet Camaro, p.22.

Caprice — third generation, B-body (1983–1990)

1985, 1987 Factory-verified

the 1985 sheet words it auxiliary dual rear speakers; the 1986 sheet prints 064

GM Heritage factory kit — 1985 Chevrolet Caprice, p.43.
GM Heritage factory kit — 1987 Chevrolet Caprice, p.46.

Cavalier — first generation (1982–1987)

1985 Factory-verified

with monaural radios only; the Celebrity doc reads U64 from its own pages as dual front coaxial and dual rear standard-range speakers

GM Heritage factory kit — 1985 Chevrolet Cavalier, p.38.

Celebrity — A-body (1982–1990)

1985–1987 Factory-verified

GM Heritage factory kit — 1985 Chevrolet Celebrity, p.44.
GM Heritage factory kit — 1986 Chevrolet Celebrity, p.43.
GM Heritage factory kit — 1987 Chevrolet Celebrity, p.43.

Citation — X-body (1983–1985)

1985 Factory-verified

the Celebrity doc reads U64 as dual front coaxial and dual rear speakers; the Citation page names only the dual rear speakers

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

Impala — sixth generation, B-body (1983–1985)

1985 Factory-verified

all models; the sheet words it auxiliary dual rear speakers

GM Heritage factory kit — 1985 Chevrolet Caprice, p.43.

Monte Carlo — fourth generation (1983–1988)

1985 Factory-verified

included with the stereo radios; 1986–1987 not claimed: the 1986–1987 guides include rear speakers only with the stereos and sell U66, although the weight pages list U64 (owner ruling 2026-10-29)

GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.

This page aggregates every documented appearance of U64 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.