The Stovebolt Site Forums The Shop Area General Truck Talk Info on 1951 GMC 100 truck

I'm looking at buying a GMC 100 . The person who has it said it's about 7' long and is an 8 lug wheel. Is it a short bed? Is it a 1/2 ton. I always thought GMC 150 was the 3/4 ton? Pretty rust free truck.Anyone have a rough idea of what value it has?

Can't help on value without photos. More info would help, i.e.; what year and any mechanical issues. Body work? help us help you.🤷🏼‍♂️

8 lug wheels are 3/4 or 1 ton, less desireable in general, less price, OK if you don't care. Does it run? Probably 228 engine, SN starts w/ displacement, R side, stamped in casting behind starter, i.e. 228xxxx, etc?, measure bed or get bed length, should be 4 speed w/ 8 lug wheels, torque tube drive?

Engine could have been replaced w/ larger engine up to 302 displacement, max.

Ed

...stamped in casting behind starter...

That should read 'aft of distributor'.

Has a 7' bed he said

(1953) GMC 100 was a short-bed (~78 inches inside length); and, the GMC 102 was a long bed (~87" inside length).

GMC 100 and 8 lug does not compute. Probably a 150 and someone is mistaken somewhere. Just post the VIN on truck and on title. Please don't say it does not have a title.

Has a title but the Vin plate is wrong. Checking the frame to see if title matches vin number stamped on casting behind starter.Said box was 7'. Must be a long box @ 87". Is long box a disadvantage. I had a short box before. Seems like short box trucks are what everyone is looking for. Body is pretty good surface rust and was running.I'm just looking for an old truck. Not a customized one.

I understand you just want an old truck and that's fine. But realize it's a clone or something/someone has added a 1/2 T cab to a 3/4 T or switched VIN plate or title or ?. Anyway you may have EXTREME TROUBLE when registering it.

Further, GMC DID NOT stamp frames. Only Chevy. If you find one, post it.

The marketplace has said that short beds are more desirable, therefore more valuable. There are many who still prefer long beds.

If you could post the numbers on motor, title and VIN plate (if it has a legit one) we could give you a better opinion.
Contrary to the paranoids, there is no danger in posting a VIN number or license plate. Leave the production number off if you want. You say the plate is wrong but you don't really know. Yet.

There is an outside chance that because it's old, back then, some DMV's used different methods of serial numbering. Usually the motor number was used. Motor gets replaced, then it does not match title and/or someone changes to another number, and you are off to the races. Something could have gotten mixed up and it's all legit IF the difference in numbers makes some sense. (outside chance). 1950 and older had hex clutch screws. 51-up, rivets.

Allow me to throw some mud in the mix.
I have seen a '47-53 GMC (not sure which year) short bed truck with 8 lug split rims.
It had a 228 engine in it.
It had the u-joint ball like what is found in a 3/4 ton Chevrolet, and a two piece drive shaft. It had the carrier bearing mounted to a a factory riveted crossmember and there was no sign of frame shortening. It was a real head scratcher. I am kicking myself for not taking any pictures.
The truck was farm dirty and everything looked like it came that way.
GMC was known for making some odd trucks over the years, so who knows.

Did some pigs fly over right then? Yes GMC made military weird stuff, railroad weird stuff and the farmers bought them at auction. Two piece drive shaft for short bed? were they 28" long each, Carl. Maybe something got in your eye when you looked up at the pigs.

I have a 51 GMC that I bought last fall. It has the 87" long bed and 8 lug lock ring rims as well as the 228 engine. On the 51s the "VIN" is really called the serial number and it's on a plate that can be found on the front part of the driver door cab. In my research, GMC didn't call out a 100 or 150 for these trucks (I think Chevy did, though). I think these are solid trucks, especially with limited rust (check the cab corners). I've been waiting for warmer weather to get mine running but I plan on a daily driver. Just brought the seat in to get it reupholstered and remove the old mouse house in the springs.

Just looked at the serial number plate and then the book. The series for my truck is 150-22, the Model is 152-22 and it has the 125 1/4 wheelbase. The serial number on the plate and title are just the last 4 numbers from the plate.

Series 100 and 150 were GMC series designations, not Chevrolet truck series designations.

Here is GMC serial number designations information from Rob English.

What is your complete Engine Serial Number?
What is your complete vehicle serial number?

152-22 is 3/4T long bed with 228 motor, as you already know. They did use 100 and 150 and so on for series. There were no short bed 3/4 T regular cab GM trucks until later. (early crew cabs maybe).
WOW Tim and I posted exactly same time. He is just too fast for me. Good info Tim, as usual.

Same back at you, bartamos