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Re: Serial Number Confusion!
Mike'51GMC #1365219 Wed Jun 17 2020 03:46 AM
Joined: Jun 2011
Posts: 3,512
E
Shop Shark
GMC Engine displacement is stamped on machined pad behind distr., right side, SN starts with displacement, I. e. 248335544.

Ed

Last edited by EdPruss; Wed Jun 17 2020 03:47 AM.

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
Re: Serial Number Confusion!
Mike'51GMC #1365642 Fri Jun 19 2020 10:55 PM
Joined: Apr 2020
Posts: 21
M
New Guy
Thanks guys!
Brad: That is the type of tag I am getting the info from. I just wanted to know if there was another location. The tag I have is getting hard to read due to age and wear I guess.

Ed: That helps!! Thanks!

Mike B: She has 5 lugs ont he front tires and on the dually backs, she has ten lugs. Her tires are 7.50-20. I will try to post some pictures. I hope it works!
Mike

Attached Files
20200604_115133_HDR.jpg (377.94 KB, 199 downloads)
Last edited by Mike'51GMC; Fri Jun 19 2020 10:59 PM.
Re: Serial Number Confusion!
Mike'51GMC #1365652 Fri Jun 19 2020 11:57 PM
Joined: Jun 2011
Posts: 3,512
E
Shop Shark
Mike,

It not a tag, it is on a machined surface of the block.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
Re: Serial Number Confusion!
Mike'51GMC #1365665 Sat Jun 20 2020 01:45 AM
Joined: Nov 2000
Posts: 1,909
F
Shop Shark
Cool old truck.


Professional Novice
Re: Serial Number Confusion!
Mike'51GMC #1365674 Sat Jun 20 2020 03:12 AM
Joined: Mar 2004
Posts: 4,546
M
Shop Shark
Originally Posted by Mike'51GMC
Mike B: She has 5 lugs ont he front tires and on the dually backs, she has ten lugs. Her tires are 7.50-20. I will try to post some pictures. I hope it works!
Mike

The wheels/tires also confirm it's a 1-1/2 ton truck...1-ton trucks use 8-lugs while the 1-1/2 and 2-ton had the 5/10 lug on 20" wheels.

Mike B smile

Re: Serial Number Confusion!
Mike'51GMC #1365676 Sat Jun 20 2020 03:37 AM
Joined: Mar 2011
Posts: 1,502
J
Shop Shark
This website deals specifically with GMC trucks.
http://www.oldgmctrucks.com/

They have a Discussion Board that you can join.

I'm not sure but your truck should of had a number emblem on the side of the hood above or below the GMC emblem.
Something like 100, 150, 350 would give you the model/series tonnage of the the truck.

The tag on the drives side hinge pillar should give you the year/model/series of the truck.

oldgmctrucks.com website is kind of hard to find stuff but just keep clicking on links and you will eventually find more info..
ID page
http://www.oldgmctrucks.com/page0012.html

GMC Serial number page
http://www.oldgmctrucks.com/page0010.html

281 22 = series 280
http://www.oldgmctrucks.com/page0015.html

Re: Serial Number Confusion!
Mike'51GMC #1365683 Sat Jun 20 2020 06:13 AM
Joined: Apr 2020
Posts: 21
M
New Guy
Again, I have to say thank you to all of you guys for the information! Knowing that it is a 1 1/2 ton definitely helps me get the right parts!!!

Thanks, Frank50! I liked her from the moment I saw the sales ad. She is rather unique in my small, rural town. I have a LOT to do to get her going, but it is going to be worth it!

Ed: I will check that tomorrow!

Jorb: Thanks for the links!!!
Mike

Re: Serial Number Confusion!
jorb #1366048 Tue Jun 23 2020 08:47 AM
Joined: May 2005
Posts: 7,257
B
General Purpose
Originally Posted by jorb
This website deals specifically with GMC trucks.
http://www.oldgmctrucks.com/

They have a Discussion Board that you can join.

I'm not sure but your truck should of had a number emblem on the side of the hood above or below the GMC emblem.
Something like 100, 150, 350 would give you the model/series tonnage of the the truck.

The tag on the drives side hinge pillar should give you the year/model/series of the truck.

oldgmctrucks.com website is kind of hard to find stuff but just keep clicking on links and you will eventually find more info..
ID page
http://www.oldgmctrucks.com/page0012.html

GMC Serial number page
http://www.oldgmctrucks.com/page0010.html

281 22 = series 280
http://www.oldgmctrucks.com/page0015.html

That website, and those pages, are what I used to decode his truck at the beginning of this post. I declared it a 1T because it is what the documents/website say it is. Mr. Rob English lists the page that includes 280 series as 1/2, 3/4, 1T. I think it was assumed all 1 1/2 T, and up, were on the next page. The rest of the internet seems to say that a 280 series is a 1.5T as Mike and the lug nuts say.


I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.


Re: Serial Number Confusion!
Mike'51GMC #1366053 Tue Jun 23 2020 12:02 PM
Joined: Dec 2002
Posts: 2,516
S
Shop Shark
Mike, Your truck is a "Rare" 1 1/4 ton truck. Not many of those were made. You'll notice it has the same small truck grille, as the 1/2 ton, through 1 ton trucks, with a extra piece attached to the splash panel below the grille, to fill the space between the grille, and the channel bumper. Everything else looks like a 300 series, 1 1/2 ton. The 300 series, and larger trucks, have a larger grille. Here's a 280 series 1 1/4 ton, next to a 300 series 1 1/2 ton. A friend of mine owns these two trucks.

Attached Files

Spanky Hardy
Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers

1948 Chevrolet 5700 COE Holmes HD W35 Wrecker
In the Stovebolt Gallery
More pictures on Photobucket

1950 GMC 250 1-Ton
In the Stovebolt Gallery
Re: Serial Number Confusion!
Mike'51GMC #1366055 Tue Jun 23 2020 12:10 PM
Joined: Dec 2002
Posts: 2,516
S
Shop Shark
Here's another 280 series 1 1/4 ton.

Attached Files
12920976373_14946908239_c9c023be33.jpg (41.23 KB, 76 downloads)

Spanky Hardy
Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers

1948 Chevrolet 5700 COE Holmes HD W35 Wrecker
In the Stovebolt Gallery
More pictures on Photobucket

1950 GMC 250 1-Ton
In the Stovebolt Gallery
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