Radio, AM/FM stereo, cassette tape

Years 1983–87 Models 5 Factory citations 18

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Also described as Radio, AM/FM stereo, stereo cassette tape

Also documented for Chevrolet

Documented applications

Caballero — G-body (1983–1987)

1983, 1985 Factory-verified

The 1984 order guide line prints UMS, so 1984 is not claimed; shared G-body platform code; cited from the joint El Camino/Caballero pages of the Chevrolet El Camino kits

GM Heritage factory kit — 1983 Chevrolet El Camino, p.6.
GM Heritage factory kit — 1985 Chevrolet El Camino, p.12.

Jimmy (full-size) — Square body (1983–1991)

1983–1986 Factory-verified

only with YE9; shared square-body platform code; cited from the Chevrolet Blazer kit

GM Heritage factory kit — 1983 Chevrolet Blazer, p.10.
GM Heritage factory kit — 1984 Chevrolet Blazer RV Full Size, p.19.
GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.12.
GM Heritage factory kit — 1986 Chevrolet Blazer, p.13.

Sierra — Square body (1983–1991)

1984–1987 Factory-verified

shared platform code; cited from the square-body C/K pickup kits

GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
GM Heritage factory kit — 1985 Chevrolet Truck, p.44.
GM Heritage factory kit — 1986 Chevrolet Truck, p.157.
GM Heritage factory kit — 1987 Chevrolet Truck, p.59.

Suburban — Square body (1983–1991)

1983–1987 Factory-verified

shared square-body platform code; cited from the Chevrolet Suburban kit

GM Heritage factory kit — 1983 Chevrolet Suburban, p.17.
GM Heritage factory kit — 1984 Chevrolet Suburban, p.23.
GM Heritage factory kit — 1985 Chevrolet Suburban, p.20.
GM Heritage factory kit — 1986 Chevrolet Suburban, p.21.
GM Heritage factory kit — 1987 Chevrolet Suburban, p.26.

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

1983, 1984, 1986 Factory-verified

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

GM Heritage factory kit — 1983 Chevrolet Vandura, p.17.
GM Heritage factory kit — 1984 Chevrolet G Van, p.18.
GM Heritage factory kit — 1986 Chevrolet G Van, p.25.

This page aggregates every documented appearance of UN3 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.