Speakers, premium dual rear

Years 1983–84, 1986–89 Models 3 Factory citations 12

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Also described as Speakers, premium

Also documented for Buick Cadillac Chevrolet

Documented applications

Jimmy — first generation (1983–1994)

1983–1984, 1986–1988 Factory-verified

included with UM6 and UX1; shared S/T platform code; cited from the joint S-10/15 Blazer/Jimmy pages of the S-10 Blazer kit

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 — 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.

Sonoma — first generation (1982–1993)

1983, 1986–1988 Factory-verified

shared S-series code; cited from the joint S-10/S-15 pages of the S-10 kits

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.34.

Vandura and Rally — Second generation G-series (1983–1996)

1986, 1988, 1989 Factory-verified

shared G-van platform code; cited from the Chevrolet G-Van kit

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.

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