Hubs, automatic locking

Years 1986, 1989, 1991, 1998 Models 3 Factory citations 4

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Also documented for GMC

Documented applications

Blazer (full-size, K5) — Square body (1983–1991)

1991 Factory-verified

the 1986 (XEZ) and 1990 (XGZ) pages print the automatic locking hub line in forms that are not accepted readings, so those years are left out

GM Heritage factory kit — 1991 Chevrolet Blazer, p.15.

Suburban — Square body (1983–1991)

1986, 1989 Factory-verified

only in: K/V models; 1989 from the option weight table; the 1987 and 1988 pages print XBZ and the 1990 and 1991 pages XGZ, so those years are left out

GM Heritage factory kit — 1986 Chevrolet Suburban, p.20.
GM Heritage factory kit — 1989 Chevrolet Suburban, p.14.

Tracker — First generation (1998)

1998 Factory-verified

GM factory document — 1998 chevrolet tracker 2wd rpo code list, p.1.

This page aggregates every documented appearance of X6Z in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.