As it appears to be that there is no replacement for the gas tank on a 1948 GMC 3/4 ton. The tank mounts partially under the cab and under the bed as well. I'd like to know if there is a modern replacement that will work in it's place. I was wondering if maybe one of the tanks off of a newer square body would fit nicely into place of if there is something else that is equivalent. I'd prefer minimal fabrication, although I know I will have to make some custom tank straps, but I would like it to mount in the same location, and be able to put the filler in a similar location as original as well. I believe the filler went through the filler piece between the bed and the running board on these. I figured since this was fuel delivery for the engine this would fit into the engine category, and I couldn't find anything on the subject in the search.
I have a flatbed on my 48 Chevy 3/4 ton, but had the same problem. I put a U-4 tank from Tanksinc.com in mine. the filler neck comes right over the frame rail.
The above photo is of the 1/2 ton version, the 3/4 ton does a similar thing but mounts more in the center of that spot since most 3/4 tons were 7 foot beds. The 1/2 ton gas tank mounts more towards the axle from what I have found in diagrams, but I couldn't find a diagram of a 3/4 ton. But that tank does mount about 1/2 under the cab, 1/2 under the bed.
Does anyone have any factory manuals or books that show what the gas tank and mounting would have looked like in a 48 GMC 3/4 ton? I was looking at a universal tank and wanted to compare the 2. I do not have a tank so I have nothing to go by.
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Factory Assembly Manual Section 8, Sheet 1.01
Note that this is dated 1953. I'm assuming the '48 3/4 ton would be the same.
Kevin First car '29 Ford Special Coupe #2 - '29 Ford pickup restored from the ground up. Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com] Busting rust since the mid-60's
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Originally Posted by RyanC
That's exactly what the hangers look like, does it say anything about dimensions of the tank?
That's all there is. No tank dimensions. You might be able to guesstimate the tank size by measuring the brackets. The Vehicle Information packet on the GM Heritage website might have tank capacity, which might help you get closer on dimensions.
Kevin First car '29 Ford Special Coupe #2 - '29 Ford pickup restored from the ground up. Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com] Busting rust since the mid-60's
Pictured above is a 48 Chev. 3/4 ton, I see the straps above, but how is that tank held in place? Isn't there a lot of frame bracing that is in that area as well? If there is room for that tank there could it be mounted from below? The other spot I am now looking at is the area where the spare tire would go. Either spot, I may need a little instruction on parts I'll need to fabricate to hold in the tank in place. At this point a factory tank will not be possible as they are just not out there.
