Transmission, Allison AT542 automatic

Years 1996–98 Models 1 Factory citations 4

Documented applications

Motor Home chassis (1983–1998)

1996–1998 Factory-verified

1998: only in CP32012 (heavy duty motor home); 1996-1997: 72 and 92 models, not available with K40

GM Heritage factory kit — 1996 Chevrolet Motorhome, p.13.
GM Heritage factory kit — 1997 Chevrolet Motorhome, p.16.
GM Heritage factory kit — 1998 Chevrolet Motorhome, p.6.
GM factory document — 1997 chevrolet chevy p32 rv van chassis rpo code list, p.1.

This page aggregates every documented appearance of MT9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.