Buzzer, headlamp warning

Years 1983–89 Models 2 Factory citations 11

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Also documented for Buick Chevrolet Pontiac

Documented applications

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

1983–1986 Factory-verified

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.18.
GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.11.
GM Heritage factory kit — 1986 Chevrolet Blazer, p.12.

Suburban — Square body (1983–1991)

1983–1989 Factory-verified

included with YE9 (1988–1989); shared square-body platform code; cited from the Chevrolet Suburban kit

GM Heritage factory kit — 1983 Chevrolet Suburban, p.16.
GM Heritage factory kit — 1984 Chevrolet Suburban, p.22.
GM Heritage factory kit — 1985 Chevrolet Suburban, p.19.
GM Heritage factory kit — 1986 Chevrolet Suburban, p.20.
GM Heritage factory kit — 1987 Chevrolet Suburban, p.25.
GM Heritage factory kit — 1988 Chevrolet Suburban, p.18.
GM Heritage factory kit — 1989 Chevrolet Suburban, p.15.

This page aggregates every documented appearance of T63 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.