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Jul 21st, 2025 | | | | Joined: May 2016 Posts: 56 Wrench Fetcher | | Wrench Fetcher Joined: May 2016 Posts: 56 | I have a 1949 GMC 1 ton dually. What motor does it have if it's original?
I just finished a 1946 chevy pickup street rod
now on a 1950 chevy 3100
.
also a GMC 220 with duals
and a 1948 chevy 2 ton
| | | | | Joined: Mar 2007 Posts: 4,185 Moderator | | Moderator Joined: Mar 2007 Posts: 4,185 | Here in Canada, I believe it would be a 216. | | | | | Joined: May 2016 Posts: 56 Wrench Fetcher | | Wrench Fetcher Joined: May 2016 Posts: 56 |
So, I found out that GMC used a separate motor in the A.D. TRUCKS. Trucks either had a 228 or a 248 , both being full oil pressure with insert bearings
So, now my question is ,, did all the engines use the same block or was the GMC block bigger ? Are these GMC engines hard to get parts for ?
Thanks, Charles Pretzer
Last edited by pretzer; 09/05/2017 1:36 AM.
I just finished a 1946 chevy pickup street rod
now on a 1950 chevy 3100
.
also a GMC 220 with duals
and a 1948 chevy 2 ton
| | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | The "previous" what?
A USA GMC light truck would have had a 228 (1/2 ton to 1-ton, 250 series or smaller).
| | | | | Joined: Dec 2006 Posts: 103 'Bolter | | 'Bolter Joined: Dec 2006 Posts: 103 | Just behind the distributor, you'll find a number stamped on the machined surface block. The first 3 digits will be the engine size. Could be a 248 or 270. I don't recall what year they began to produce the 302 | | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | "Could be a 248 or 270." Probably not?Post the engine serial number code as suggested above by Elderly Iron. Do not be surprised if there is a letter before the engine displacement. | | | | | Joined: Dec 2006 Posts: 103 'Bolter | | 'Bolter Joined: Dec 2006 Posts: 103 | 55-9 I'm sure on. 48-54, not so much, though the 50 GMC 2.5 ton did have a 248 in it with the big port head. Not that it could be said it was original! www.oldgmctrucks.com is the best place to find ID info. Hard to navigate, but a wealth of info. | | | | | Joined: May 2016 Posts: 56 Wrench Fetcher | | Wrench Fetcher Joined: May 2016 Posts: 56 | Serial number on motor B228 239989
Serial number on cab door B228323898
Are they suppose to be the same number?
I just finished a 1946 chevy pickup street rod
now on a 1950 chevy 3100
.
also a GMC 220 with duals
and a 1948 chevy 2 ton
| | | | | Joined: May 2005 Posts: 8,877 . | | . Joined: May 2005 Posts: 8,877 | Some states used engine serial number for vehicle title. Perhaps that's what happened here, and then someone made up a replacement door tag with number from title instead of the correct/original door tag. | | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | In NC and NY, there is a good chance you might need a bonded title (because those codes should not be the same).
Is that code on your title/registration? If it us, and it is titled/registered in your name, you are OK. | | | | | Joined: May 2016 Posts: 56 Wrench Fetcher | | Wrench Fetcher Joined: May 2016 Posts: 56 | thanks everyone for the input !! very much appreciated
I just finished a 1946 chevy pickup street rod
now on a 1950 chevy 3100
.
also a GMC 220 with duals
and a 1948 chevy 2 ton
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | So you have a GMC 228 cu. in. engine that has probably been rebuilt once.
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.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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