Speedometer driven gear fitting & adapter

Years 1963–79, 1982, 1984, 1989 Models 6 Factory citations 3

Also described as Speedometer driven gearTire Pressure Stock (sticker)Speedometer driven gear & fittingSpeedo driven gear & fittingsCL custom interiorRS functional and appearance package

Documented applications

Camaro

1967–1969 Confirmed

internal
1970s Confirmed

internal

Corvette (C3)

1974 Single-source

price/qty NA

Impala / Full-Size

1963–70s (varies) Confirmed

Nova / Chevy II

1975 Confirmed

Cavalier — first generation (1982–1987)

1982, 1984 Factory-verified

1984: wagon, sedan, coupe and hatchback models; 1982: the kit has no option pages, and its steering table names Z12 only as including the tilt wheel on the sedan; the 1985–1987 option lines print it as ZTZ, 212 and 712, so those years are left out

GM Heritage factory kit — 1982 Chevrolet Cavalier, p.21.
GM Heritage factory kit — 1984 Chevrolet Cavalier, p.8.

Cavalier — second generation (1988–1994)

1989 Factory-verified

1989 coupe, sedan and wagon; includes 14 inch Rally wheels, tachometer, power steering and FE2 sport suspension; the first-generation doc reads Z12 as the CL custom interior

GM Heritage factory kit — 1989 Chevrolet Cavalier, p.4.

This page aggregates every documented appearance of Z12 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.