Transmission, 3 speed automatic

Years 1983–90 Models 6 Factory citations 29

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Also documented for Buick Chevrolet Oldsmobile Pontiac Saturn

Documented applications

Caballero — G-body (1983–1987)

1983–1986 Factory-verified

Standard; the 1987 order guide prints the 3 speed automatic without its code; 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.5.
GM Heritage factory kit — 1984 Chevrolet El Camino, p.5.
GM Heritage factory kit — 1985 Chevrolet El Camino, p.11.
GM Heritage factory kit — 1986 Chevrolet El Camino, p.5.

Jimmy — first generation (1983–1994)

1983, 1987 Factory-verified

only in: 2WD; the 1983 page offers it only with YF5 California emissions and the 1.9L engine; 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.6.
GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.42.

Sierra — Square body (1983–1991)

1983–1987 Factory-verified

shared platform code; cited from the square-body C/K pickup kits; the kit pages also print MXI

GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
GM Heritage factory kit — 1984 Chevrolet Truck, p.23.
GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
GM Heritage factory kit — 1987 Chevrolet Truck, p.37.

Sonoma — first generation (1982–1993)

1983–1984, 1987 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.33.
GM Heritage factory kit — 1984 Chevrolet S 10, p.9.
GM Heritage factory kit — 1987 Chevrolet S 10, p.20.

Suburban — Square body (1983–1991)

1983–1990 Factory-verified

only in: 20/2500 series; standard with B3J diesel equipment (1984–1987); 1983 and 1988 from the power team charts; the 1987 page prints MXI; shared square-body platform code; cited from the Chevrolet Suburban kit

GM Heritage factory kit — 1983 Chevrolet Suburban, p.7.
GM Heritage factory kit — 1984 Chevrolet Suburban, p.16.
GM Heritage factory kit — 1985 Chevrolet Suburban, p.16.
GM Heritage factory kit — 1986 Chevrolet Suburban, p.15.
GM Heritage factory kit — 1987 Chevrolet Suburban, p.22.
GM Heritage factory kit — 1988 Chevrolet Suburban, p.10.
GM Heritage factory kit — 1989 Chevrolet Suburban, p.17.
GM Heritage factory kit — 1990 Chevrolet Suburban, p.19.

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

1983, 1984, 1986–1990 Factory-verified

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

GM Heritage factory kit — 1983 Chevrolet Vandura, p.13.
GM Heritage factory kit — 1984 Chevrolet G Van, p.8.
GM Heritage factory kit — 1986 Chevrolet G Van, p.15.
GM Heritage factory kit — 1987 Chevrolet G Van, p.14.
GM Heritage factory kit — 1988 Chevrolet Vandura, p.9.
GM Heritage factory kit — 1989 Chevrolet G Van, p.20.
GM Heritage factory kit — 1990 Chevrolet G Van, p.19.

This page aggregates every documented appearance of MX1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.