[Studmuffin]

This might be a noob question.
I know that the last 5 digits say what order the trucks came off the line,
But could someone explain to me exactly where the individual rest of our digits come from?
Truck # 1GCES14P64B104242
can be the example.

 

[Hollister SSR]

Do you have a shop manual? The explanation is in the front pages.

 

[xoxoxoBruce]

VIN Number...

 

[SWT RYD]

VIN Number...

Good Morning, Bruce.

 

[Guzzi Guy]

Yep, got to believe it's a small cab. I put my custom R cover on my 2011 Chevy Colorado truck and it doesn't fit lengthwise. Fits tightly over the headlights but that's it.

Dave

 

[Studmuffin]

That chart explains all the questions I have except for two...
What determines the check number,
(Position 9)
And what does the 1 mean after the B and before the sequence number?
(Position 12)

 

[xoxoxoBruce]

Positions 12 through 17 are the sequence number.

 

[Studmuffin]

Yes, but why is digit 12 always the number one?

 

[xoxoxoBruce]

Because they would have to build another 76,000 trucks to roll it to a 2.

 

[Studmuffin]

Okay, that makes sense, I understand now.
Now all I'd like to know is what determines the Position 9 check number.
I don't want to believe it's a random number, everything else means something specific.

 

[xoxoxoBruce]

Have Google explain check digits to you, they are on bar codes, and most other computer handled numbers.

 

[tennesseecozydog]

1GC = U.S. Built
E =Hydraulic Brakes
SI = Signature Series 4x2 Half Ton
4 = 2 Door Cab
H = 6.0 Engine
4 = Check Digit
5 = Model Year
B = Plant: Lansing Michigan
1 = Regular Production
00000 = Production Number Coming off the Line

This is what that guy who called me told me anyway ... I think his name was Rick Wagoner or it could have been Wayne Cherry. I had called him to ask him a question and had to leave him a message. He called me right back ... the following month !!! :laugh: :laugh: :laugh:

 

[ssr71]

I have uploaded the GM VIN card passenger car reference 2005 as an example. I do not have the corresponding model years for light truck and the website where these originally came from is no longer operational.

 

[xoxoxoBruce]

Post #3 is right out of the SSR Repair Manual, do you disagree?

 

[BlueStreak]

Yes, but why is digit 12 always the number one?

It is not ALWAYS 1 There were some 0 in the sequence so the sequence below is a better answer to your question.

1GC = U.S. Built
E =Hydraulic Brakes
SI = Signature Series 4x2 Half Ton
4 = 2 Door Cab
H = 6.0 Engine
4 = Check Digit
5 = Model Year
B = Plant: Lansing Michigan
1 = Regular Production
00000 = Production Number Coming off the Line

The 0 (zero) indicated other than regular production and was only used (to my knowledge) on the Signature Series and on Rick Wagoner's 50th birthday unit.

 

[Studmuffin]

Hmm... I see. Thanks for the interjection, BlueStreak.
I also did look up check digits as Bruce suggested, and I didn't realize that much math went into every VIN!
I learned something new today,
And I am happy now.