Brakes, power

Years 1983–84, 1986–89 Models 3 Factory citations 7

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Also described as Brakes, vacuum power

Also documented for Buick Chevrolet Oldsmobile Pontiac

Documented applications

Sierra — Square body (1983–1991)

1984, 1986, 1987 Factory-verified

shared platform code; cited from the square-body C/K pickup kits; 1984 and 1987 from other options’ requirement remarks (available only with J50 or J55 power brakes)

GM Heritage factory kit — 1984 Chevrolet Truck, p.46.
GM Heritage factory kit — 1986 Chevrolet Truck, p.160.
GM Heritage factory kit — 1987 Chevrolet Truck, p.59.

Sonoma — first generation (1982–1993)

1983, 1988 Factory-verified

1988 from a power team requirement remark (Reqs J50 Brakes); 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.32.
GM Heritage factory kit — 1988 Chevrolet S 10, p.81.

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

1984, 1989 Factory-verified

G10; 1984 from the February 1984 data book pages in the mislabelled G-Van kit file; shared G-van platform code; cited from the Chevrolet G-Van kit

GM Heritage factory kit — 1985 Chevrolet G Van, p.16.
GM Heritage factory kit — 1989 Chevrolet G Van, p.30.

This page aggregates every documented appearance of J50 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.