Bill,

Thank you for the information.

I am confused by the Manual.

It shows a 36-37 low cab (GC is my model) without filler neck holding 18 gallons.

It also shows 37-46 1/2 (single unit) with a filler neck.

That information seems contradictory. Did the 37 1/2 ton come with a filler neck or not?

What is a single unit?

Any ideas?

~Justin

1937 Chevy 1/2-ton
"Wylburr Clyde"
In the Stovebolt Gallery
More pictures on Google

My Grandfather bought it new and Dad drove it through highschool. The 3rd & 4th generations put it back on the road on 8/8/2015!