Extra Number/Letter in Vin???

[rico7769]

Team,

I've looked into the info on the VIN for my truck and can't find out why I have an extra number based on the year.

The VIN stamped on the plate is CS1570C P7645A

I get the CS1 but can't find get the 5 as a code for a 67. Then the 0C ???
The P is for Pontiac and then the sequence number 7645 for production. Any input on the "A"?

I'm confused???

Also, the SPID shows an axle code of 1FS025 (as best as I could read it from the orig sticker being faded)
Can't find any info on what the correct axle ratio is for this????

Please help!

Steve

['68OrangeSunshine]

It's not a GMC, perchance is it?
CS157OC-P7645A
C= 2 wheel drive
S= L6 engine
1= 3,900 - 5,800 # half-ton
5= ?
7= 1967 [maybe]
OC= Stepside,'67-'68
-= space for special codes NY, PA, MD
P= Pontiac, Mich. Assembly Plant
7645= Sequence number after 1001
A= ? [could it be a '4' ?]

GMC used a letter code for years: A= '69, B= '68, C= '67, Z= '70, 1= '71, 2 = '72.
Just a stab at it. Using the LMC catalog p 10 chart. By no means accurate.
In the Model ID numbers, '57' means 115" wheelbase (shortbed).
Could it be:
C= Conventional, 2wd
S= L6
1= 1/2 Ton
57= 115" wb
OC= Stepside ['67 + '68]
- = nothing
P= Pontiac plant
7= 1967
6454 = vehicle sequence number.
--Or-- 7645 and "A" = 1969 ?
Can't tell w/o seeing the truck in person.
Maybe some real expert can chime in.

[rico7769]

I'll see if i can get a shot of the door plate that is stamped to get some better visibility to it for the rest of the team to see.

Steve

[Rod]

C= conventional cab
S= six cylinder engine
1 = 1/2 ton
57 = cab to wheel base dimension which a 57 denote 42 inches
0C = fender side box
space for state identifier if applicable - in this case its not.
P = Pontiac assembly plant
7645 serial number
A = 1969

It's an odd version.

['68OrangeSunshine]

Well I wasn't off by much. I was mislead because Rico mentioned 67. Chevy called it a Stepside but GMC called them Fendersides, or something. [And Ford called that bodystyle a "Flareside" if I'm not mistaken.]

[Rod]

Well rico7769 is it 67or 69?

[rico7769]

based on the dash bezel and the front clip having the vertical "custom" badges I would bet a 67. The bed is off of a 68 with side markers. I bought the truck two years ago with a 77 sb350, a TH400 tranny from ??? and a 67 (i think) cab, and the bed a 68.

['68OrangeSunshine]

A '67 cab is most likely to have a small back window. However the large 'Panoramic" back window was available as an option on the '67s. '68s and later it was standard.
What would tell you it's a '67 would be the different style of locks on the vent windows. The pure '67 has ridged horizontal lines on it. '68s and later are smooth. '67 glovebox doors are wrinkle/ flat black. All this assuming the parts are original and unmolested. A Frankenstein truck would be more likely assembled according to builders' parts availability, as they come in or are acquired.
Do the front fenders have side marker reflectors?

[rico7769]

Vent window handles are ridgid and there are no front side markers.
SPID says lg panoramic window and customer appearance pkg or something like that

['68OrangeSunshine]

Sounds like a 1967 truck to me.
Do the parking lights go completly out when you pull the Lights knob all the way out?
I wonder who else can try decoding your vin?

[OhioDan]

Ya might check here? Found this. Hope it helps?

http://www.6066gmcguy.org/VinNumber.htm

[rico7769]

THanks for all the input. We'll keep pluggin away.

[Rod]

By your description I'd say 67 also with a panoramic rear view window option. The last letter in some vins, as in your case the "A" was to refer to a range of GVW as in the 60-66 vin decoding styles. "A" meaning 1/2 ton gvw range. That would work as its a 1/2 ton I'd assume, but there is really nothing to identify the year in this vin if thats the case.
Odd vin, its like they missed a letter.

['68OrangeSunshine]

So send it in to the GMC Guy. Then post his reply back here. I'm curious to see what he says.