Preferred equipment group 1, convertible

Years 1988–94 Models 1 Factory citations 7

Documented applications

Corvette — C4 (1984–1996)

1988–1994 Factory-verified

1988 Quick-Spec package 1 (options page p.43 prints the heading Package CYAI); the 1990 and 1992 order guides print CYAI

GM Heritage factory kit — 1988 Chevrolet Corvette, p.43.
GM Heritage factory kit — 1989 Chevrolet Corvette, p.34.
GM Heritage factory kit — 1990 Chevrolet Corvette, p.16.
GM Heritage factory kit — 1991 Chevrolet Corvette, p.12.
GM Heritage factory kit — 1992 Chevrolet Corvette, p.51.
GM Heritage factory kit — 1993 Chevrolet Corvette, p.75.
GM Heritage factory kit — 1994 Chevrolet Corvette, p.42.

This page aggregates every documented appearance of CYA1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.