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Old 05-03-2007, 11:05 PM   #1
Americanrider
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GMC Vin decode please

Trying to find if my 70 GMC shorty was a step bed or a fleet bed from the factory. It has a steel floor fleet bed on it now and needs a lot of work. It's a 250 6cly/3 column shift. It had the vin listed on the glove box lid and not a model code like the Chevys do. Only 2 options listed: Blue paint & blue interior trim. The other oddity is that it has a coil spring rearend, which sould be listed as an option, am I right or wrong?

Here ya go: CS134 ZZ526**

Thanks ya'll
It's the Blue beater in the background.
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Old 05-03-2007, 11:44 PM   #2
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Re: GMC Vin decode please

coil spring is standard on just about all 67-72 1/2 tons

Jared
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Old 05-03-2007, 11:49 PM   #3
72armyswbtruck
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Re: GMC Vin decode please

VIN Decoder

model number breakdown.The model numder is made up of 2 letter and 5 numbers and is found in the glove box door
frist letter will be one of the following indacates chassis type)
C=conventional cab
G=light delivery
K=conventional cab four wheel drive
M=conventional cab tandem
P=Forward controls
S=school bus chassis
T=Tilt cab
Second letter is one of the following(engine type)
D=4cyl detroit diesel
E=V-8 Gasoline
G=toro-flow diesel
S=6cyl Gasoline
T=3cyl detroit diesel
First number (series Indentification)
1=100-150-9100(1/2 tons)
2=200-250-9200(3/4 tons)
3=300-350-9300(1 tons)
4=400-450-9400(3 tons)
5=500-550-9500(5 tons)
6=600-650-9600(tandems)
next 2 numbers(cab to axle dementions)
chev gmcs inches Chev Gmc Inches
06 56 36" 17 67 102"
07 57 42" 18 68 108"
08 58 48" 19 69 114"
09 59 54" 20 70 120"
10 60 60" 21 71 126"
11 61 66" 22 72 132"
12 62 72" 23 73 138"
13 63 78" 25 75 150"
14 64 84" 28 78 168"
15 65 90" 31 81 186"
16 66 96"
last two numbers (Body type)
02=ffc exc f.a.b 35=step van king
03=cab and chassis 36=suburban/deluxe
04=stepside pick-up 42=chassis only
05=panel 45=step van
06=suburban with panel rear doors 55=step van king aluminum
12=w/s cowl exc F.a.b 62=ffc w/f.a.b
13=Cab W/F.a.b
14=Blazer/jimmy
16=suburban with end gate
26=suburban/custom
32=motorhome
34=fleetside pick-up

1967-1969 Vin break down (chev and gmcs)
series 10-30 only
first letter is the chassis type(see codes for model break down)
second letter is the engine type(see codes for model break down)
third is a number=gvw range (see codes for series id in model code break down)
fourth is a number=model code
model codes are;2=chassis/cowl/bus,3=chassis cab,4=pick-up,5=panel,6=carryall(suburban)9=stake side
fifth is a number =model year
if the number is a;
7=1967
8=1968
9=1969
sixth is a number or on caniadan made truck it is a number=assembly plant
Assembly plant codes
A=atlanta N=norwood
B=baltimore P=pontiac
F=flint S=st.louis
z=fremont T=tarrytown
J=janesville 1=oshawa
***on 67-69 Canadian GMC trucks the number"9" will appear inbetween the first two letters
1970-71 chevrolet truck only(series 10-30)

it is all the same for the break down but the year codes , production plant
1970-71 year codes production plant code
0=1970 same as 67-69 but they added one more
1=1971 code;U=lordstown
1970-1971 GMC only(1500-3500 series only)
first letter will be one of these
C=conventional cab
K=four wheel drive
P=forward controls
second letter
E=V-8 gasoline
S=in line 6 cyl gasoline
third is a number=GVW range(see codes for for series id in model code break down)
fourth and fifth numbers = body type
02=flat back cowl 35=value van-steel
03=cab&chassis 42=chassis only
04=fenderside pick-up 55=value van -aluminum
05=panel
06=suburban with panel doors
14=Jimmy/blazer
16=suburban with tailgate
34=fleet side pick-up

sixth is a letter(unless canadian built then it will be a 1)=assembly plant
all codes are the same as 67-69 but they added U=lordstown
seventh number or letter is the year code
Z=1970
1=1971
last numbers=serial number


1972 chev and gmc trucks
****General motors added one more letter to these trucks vin numbers****
first letter is the trucks make code
C=chevrolet and T=GMC
second is letter is the vehicle type(See 1971 codes)
third letter =engine type (see model code break down for codes)
fourth is a number= body type
2=chassis,cowl,bus 5=panel
3=cab&chassis 6=carryall(suburbans)
4=Pick-up
fifth is the number 2 for the year code(1972)
sixth is a number or a letter on canadian made trucks for the assembly plant code
A=Atlanta N=norwood
B=baltimore P=pontiac
F=flint S=st louis
Z=fremont T=tarrytown
J=janesville 1=oshawa
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Old 05-03-2007, 11:53 PM   #4
Americanrider
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Re: GMC Vin decode please

Quote:
Originally Posted by bandit1 View Post
coil spring is standard on just about all 67-72 1/2 tons

Jared
Standard for Chevys, optional for GMCs they had (for the most part) Leaf type rears, or so I have read here on the board.

72armyswbtruck: I already tried GMC Pauls site.

CS= Cab truck/6Cly
1= 1/2 ton

the rest of that make very little sense....
cab to axle dementions wft?

If I just drop down to the last part and add the "34" it works. I need to know if it's correct.
And what is up with the ZZ ?

Last edited by Americanrider; 05-04-2007 at 12:03 AM.
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Old 05-04-2007, 03:34 PM   #5
bandit1
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Re: GMC Vin decode please

Quote:
Originally Posted by Americanrider View Post
Standard for Chevys, optional for GMCs they had (for the most part) Leaf type rears, or so I have read here on the board.
Sorry didnt realise this. Both my GMC have coils, should it say anything different on the SPID sheet


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Old 05-04-2007, 03:52 PM   #6
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Re: GMC Vin decode please

If I remember right, the 3/4 tons have leafs, the 1/2's have coils.
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Old 05-04-2007, 10:18 PM   #7
Americanrider
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Re: GMC Vin decode please

Maybe that changed after 68? Every 67 & 68 1/2 ton GMC I have come accross had leafs.
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Old 05-04-2007, 10:30 PM   #8
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Re: GMC Vin decode please

Just looked at my glove box in my 1970 GMC which has leaf springs on it and they are listed on the option list. Your model number may be worn off,mine is just above the paint colour on the left hand side of the option list just below the word description.
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Old 05-04-2007, 11:01 PM   #9
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Re: GMC Vin decode please

Everything I've read said that Chevy's were factory coil and GMC factory leaf unless special ordered. But if your GMC has optional leafs I guess I'm not right Also, I know I've read that GMC's are decoded differently than Chevy's. I think Longhornman has some decoding info for them.
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Old 05-05-2007, 02:26 PM   #10
Longhorn Man
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Re: GMC Vin decode please

I think 69 and 70 1/2 tons GMC had coils standard, I know every 69 1/2 ton I've seen had them, and not listed on the SPID.
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Old 05-06-2007, 01:08 AM   #11
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Re: GMC Vin decode please

Makes sense now, Thanks Andy
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Old 05-06-2007, 01:17 AM   #12
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Re: GMC Vin decode please

sure thing.
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