Turbo Hydra-Matic (TH400 per 67–72 list; TH350 per 73–87 list)

Years 1967–81, 1998–02 Models 2 Factory citations 6

Query this via API →

Also described as THM350 3-speed automaticTransmission, manual 5 speed, overdrive

Also documented for Pontiac

Documented applications

C/K Trucks

1967–72 Disputed

Meaning shifts across generations
1973–81 Disputed

Same code = TH400 in 67–72 list

Camaro — Gen 4 (1993–2002)

1998–2002 Factory-verified

GM factory document — 1998 chevrolet camaro rpo code list, p.1.
GM factory document — 1999 chevrolet camaro rpo code list, p.1.
GM factory document — 2000 chevrolet camaro rpo code list, p.1.
GM factory document — 2001 chevrolet camaro rpo code list, p.1.
GM factory document — 2002 chevrolet camaro rpo code list, p.1.
GM Heritage factory kit — 1998 Chevrolet Camaro, p.38.

This page aggregates every documented appearance of M49 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.