I have a '54 GMC with a Hydra-matic.

Being its a GMC it doesn't help much sorting out options Chevrolet offered.

My '55 1st GMC Suburban has an SM420 but I've seen a Hyrdra-matic equiped Suburban. If I can recall where I may be able to find pictures of it.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...