Question on 56 GMC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

56 gmc · 06-17-2004, 04:09 AM

Can you help me with my serial number?
I have an old GMC pick up serial number 102CY3991.

I think I have this almost figured out.
10= ½ ton
2= long bed
C=Oakland California
Y= Later part of 1955
3991 = production number
Does the Y mean 1955?
The title says 1956.
Is this truck a 1955?
There is a comment section on the title that says 3625 56
I was wondering if the title may be wrong.
Do you know how many trucks of this model were produced that time frame?
I haven’t seen too many GMC long beds with the custom cabs out there and was wondering if I got I rare one.

Seon · 06-17-2004, 08:52 AM

Check this site out http://www.6066gmctrucks.org/ . I'm sure you'll be able to get the info you're seeking.

SideStepper · 06-17-2004, 10:26 AM

Your VIN # 102CY3991, as you figured out is as follows:
102 = 1/2 ton longbed
C = California, Oakland
Y = 1956
3991 = production #

Z = 1955
I believe if your truck was a V-8 truck the VIN would read 1028CY3991.

The website listed in the above post is for 1960-1966 GMC trucks.
The website applicable to the 1955-1959 GMC trucks is http//1955GMC.com

56 gmc · 06-18-2004, 01:36 AM

Thanks guys,
You have been very helpful.
My son and I are restoring a 56 GMC longbed and we are very excited.
I bought it 25 years ago and never had the time to restore it. My son is restoring it for his senior project.

We will post a picture of it when we get done.

56 gmc · 06-23-2004, 01:54 AM

Came across a web sight oldGMCtrucks.com. The Y in my serial number is the 1955 production per the GMC record books. The truck was amoung the last trucks off the line in 1955 (Y series production) That would put my truck in the last quater of the year and very near the end. Because it was at the end of the production run, It probably was sold in 1956. You might find this web sight helpful.

Are the 1955 Y series production models harder to find and are they more valuable? Was just courious.

Apache · 06-23-2004, 04:06 AM

The Y meaning last quarter of the year for 55, is mostly because the first half of 55 was the 54 body style GMC. If I am wrong, somebody set me straight.

SideStepper · 06-23-2004, 09:44 AM

Sorry guys, I made a mistake. I even misread the very website
(http://www.1955gmc.com) that I refered to.
You are correct:
Y=1955
X=1956
T=1957
S=58-59
Thanks for not letting me give out incorrect info!

DennyB · 06-25-2004, 04:05 PM

Welcome to the board 56 gmc!
Its always great to hear of more father and son projects!

rico_bob · 06-26-2004, 12:44 AM

Hello,

And welcome abaord! We have lots of useful info on our web site too! www.ricos-rods-and-relics.com

bartamos · 07-02-2004, 12:48 AM

What 56gmc finally found out is correct. They just sold the left over "y" as 56. It is not worth more or less.

06-17-2004, 04:09 AM	#1
56 gmc Registered User Join Date: Jun 2004 Posts: 16	Question on 56 GMC Can you help me with my serial number? I have an old GMC pick up serial number 102CY3991. I think I have this almost figured out. 10= ½ ton 2= long bed C=Oakland California Y= Later part of 1955 3991 = production number Does the Y mean 1955? The title says 1956. Is this truck a 1955? There is a comment section on the title that says 3625 56 I was wondering if the title may be wrong. Do you know how many trucks of this model were produced that time frame? I haven’t seen too many GMC long beds with the custom cabs out there and was wondering if I got I rare one.

06-18-2004, 01:36 AM	#4
56 gmc Registered User Join Date: Jun 2004 Posts: 16	Thanks Thanks guys, You have been very helpful. My son and I are restoring a 56 GMC longbed and we are very excited. I bought it 25 years ago and never had the time to restore it. My son is restoring it for his senior project. We will post a picture of it when we get done.

06-23-2004, 01:54 AM	#5
56 gmc Registered User Join Date: Jun 2004 Posts: 16	found a web sight on serial numbers Came across a web sight oldGMCtrucks.com. The Y in my serial number is the 1955 production per the GMC record books. The truck was amoung the last trucks off the line in 1955 (Y series production) That would put my truck in the last quater of the year and very near the end. Because it was at the end of the production run, It probably was sold in 1956. You might find this web sight helpful. Are the 1955 Y series production models harder to find and are they more valuable? Was just courious.

06-23-2004, 04:06 AM	#6
Apache Registered User Join Date: Jun 2004 Location: South Carolina Posts: 419	The Y meaning last quarter of the year for 55, is mostly because the first half of 55 was the 54 body style GMC. If I am wrong, somebody set me straight. __________________ 54 Chevy Bel Air 4dr powerglide 54 Chevy SWB 58 Chevy Big Window SWB Fleetside project 58 Chevy LWB 235/4spd 76 Chevy Nova 350/TH350 4.88's *10kmiles on "new" engine 79 Chevy 4x4 SWB 350/4spd 3/4 ton 81 Mazda RX7 84 F@!d Mustang 96 F@!d Ranger 2.3L/5spd

06-25-2004, 04:05 PM	#8
DennyB Led Sled! Discs R 4 ME! Join Date: Jan 2001 Location: Toms River, NJ, USA (Transplanted Hoosier) Posts: 7,327	Welcome to the board 56 gmc! Its always great to hear of more father and son projects! __________________ "Never ride faster than your Angel can fly" I.M.O.M,W,J&C Patriot Guard Rider

06-17-2004, 08:52 AM	#2
Seon Registered User Join Date: Nov 2002 Location: Northern CA. Posts: 503	Check this site out http://www.6066gmctrucks.org/ . I'm sure you'll be able to get the info you're seeking.

06-17-2004, 10:26 AM	#3
SideStepper Registered User Join Date: Jun 2002 Location: Southern California U.S.A. Posts: 280	Your VIN # 102CY3991, as you figured out is as follows: 102 = 1/2 ton longbed C = California, Oakland Y = 1956 3991 = production # Z = 1955 I believe if your truck was a V-8 truck the VIN would read 1028CY3991. The website listed in the above post is for 1960-1966 GMC trucks. The website applicable to the 1955-1959 GMC trucks is http//1955GMC.com

06-23-2004, 09:44 AM	#7
SideStepper Registered User Join Date: Jun 2002 Location: Southern California U.S.A. Posts: 280	Sorry guys, I made a mistake. I even misread the very website (http://www.1955gmc.com) that I refered to. You are correct: Y=1955 X=1956 T=1957 S=58-59 Thanks for not letting me give out incorrect info!

06-26-2004, 12:44 AM	#9
rico_bob "Treasure the Ride" Join Date: Nov 2001 Location: Mid Michigan, Harrison Michigan, USA Posts: 682	Hello, And welcome abaord! We have lots of useful info on our web site too! www.ricos-rods-and-relics.com __________________ If you think you can you're right. If you think you can't you're still right. Trucks: '56 SWB; '57 SWB; '63 C-10 Current projects: 1963 Long Fleetside for the wife! '56 for the daughter. Visit us at: www.ricos-rods-and-relics.com

07-02-2004, 12:48 AM	#10
bartamos Registered User Join Date: May 2003 Location: ARIZONA Posts: 49	What 56gmc finally found out is correct. They just sold the left over "y" as 56. It is not worth more or less.



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