Meter, engine hour

Years 1993, 1998–00 Models 2 Factory citations 4

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Also documented for GMC

Documented applications

Express — GMT600 (1996–2002)

1998–2000 Factory-verified

GM factory document — 1998 chevrolet express rpo code list, p.1.
GM factory document — 1999 chevrolet express rpo code list, p.1.
GM factory document — 2000 chevrolet express rpo code list, p.1.

Chevy Van — Second generation G-series (1983–1996)

1993 Factory-verified

SEO; Datcon, not available with air conditioning.

GM Heritage factory kit — 1993 Chevrolet G Van, p.67.

This page aggregates every documented appearance of 7Y4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.