Tire, spare, P205/75R15, on-off road, steel belted radial, blackwall

Years 1984, 1986 Models 1 Factory citations 2

Also documented for Chevrolet

Documented applications

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

1984, 1986 Factory-verified

1987 is left out: the 1987 tire charts print it only as the spare beside another size's codes; shared G-van platform code; cited from the Chevrolet G-Van kit

GM Heritage factory kit — 1984 Chevrolet G Van, p.15.
GM Heritage factory kit — 1986 Chevrolet G Van, p.24.

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