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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Suspension - Brakes - Steering> Identification VIN C20 or C10?
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Topic Review (Newest First)
10-25-2018 08:06 AM
wave1957 "i have so much trouble with german registration because i have a C10
but title and VIN says C20 :-)))
can anybody help?"

Sometimes, we can forget to keep things simple!
What matters is that your paperwork matches your VIN.
After that, what will the German administration check on your engine? Will they for instance check the actual displacement of the engine? If not, you are good, you own a C20!
When I registered my '57 Chevy Suburban in France, I needed to give the administration the weights and tow capacity, which I could not find anywhere, so I made up numbers, adapted to the weight of my camping trailer!...
For registration issues, you should really get in touch with local American car/hot rod clubs, some people have probably gone through the same issues, know who to talk to...
10-23-2018 01:20 PM
75gmck25 I have the specifications manual for my 1975 truck, and it should be the same for a 1977 truck. However, its 149 pages and too large to attach to my message. I was able to attach two pages with size and weight specs.

You could also search the internet for a 1977 version of the same manual.

10-22-2018 12:07 PM
hanson f...
i forget
- weights (net, total, axle)
10-22-2018 12:06 PM
hanson Can anyone help with dimensons for my german registrations?
I need for my Chevy C10 1977 fleet side shortbed 117,5 inch
- height
- width
- length
Thanks a lot guys
08-30-2018 11:02 AM
RWENUTS The 466422 should be the last six digits of your vin.
If it’s not then you know you’ve got a switched cab.
08-30-2018 10:14 AM
hanson I have been searching for the number of the frame and found this number

T 325 S

can anyone find some news with this information?
or wer can i search for?

08-29-2018 08:12 PM
Is it possible that a stock C20 from 1977 has short bed????
Yes it is possible. It would have to be special ordered but you could get one. I worked for a company that had several of them at our location, they were used primarily for towing long tool trailers. They had more at other locations, and they may have been COPO trucks.

Also the C10 front crossmember and rear end will bolt to a C20 frame. But in any case you have a C20 with C10 suspension.
08-28-2018 09:49 AM
75gmck25 It sounds like you have a half ton frame and drivetrain, but they swapped in a 3/4 ton body and kept all the 3/4 vin stickers on the body. Too bad they did not give you all the details.

According to this article, the VIN is also located on the frame, so you might want to see what you find there to determine what 1/2 ton you have.

In the U.S., having a 3/4 ton VIN can be an advantage, since emissions controls came in later for 3/4 ton trucks. For example, my '75 3/4 ton with 8200 GVW rating never had catalytic converters, air pump, EGR, or any other emissions add-ons. It only has a PCV system and a choke stove for the air cleaner intake. This makes it a lot easier to comply if you live in an area that requires visual checks or emissions measurement.

You will also find that having a small block usually means cheaper parts that are easier to find. Having a 454 would not be bad, but you can easily build up an SBC 383 stroker that has much more power than the original 454.

08-28-2018 07:58 AM
RWENUTS No c20 short bed!
Of course the glove box label matches the vin plate. It’s supposed too.
As stated before you have a truck with a cab swap.
You should join up over here for more info.
The 1947 - Present Chevrolet & GMC Truck Message Board Network - Powered by

Here’s a post from there about where to find your vin stamped on the frame.
VIN number - cab swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

I’ll bet your frame number doesn’t match your vin.
08-28-2018 05:52 AM
hanson Is it possible that a stock C20 from 1977 has short bed????
Lable in glove box says wheelbase 117,5"
data of lable is identical with vin plate at driver door

i have so much trouble with german registration because i have a C10
but title and VIN says C20 :-)))
can anybody help?

VIN = CCS247Z192763
C = Conventional CAB* 106 (2,6924 m) (CAB CHASSIS TYPE)
S = 454 205*/240 4BBL (ENGINE CODE > C.I.D./L - N.H.P. CARB)
05-08-2018 08:58 AM
Originally Posted by hanson View Post
Yes, only the cab is stock.
And the big block has switched to a little 327/307 - worst change :-(((
This is just my opinion...but few guys would go to the trouble of turning a big block 3/4 truck into a small block 1/2 ton, just too many things to change.
I suspect your chassis, engine, transmission, rear axle, frame are all 1/2 ton and has always been small block powered....someone just replaced the wrecked or rotted original 1/2 ton cab with one that came off a wrecked 3/4 ton big block truck, and now the VIN on the cab means absolutely nothing as far as identifying what parts are on the chassis.

The 1979 3/4 ton my Dad redid he bought new in 1980, rebuilt the entire body in 1994 using a cab, bed, and front clip from 3 different western states trucks. All the parts were purchased from Dick's Southern Truck Parts in Middlebury, Indiana, right on the Michigan/Indiana state was blue 1985 and from Texas, box was silver 1983 and from Oklahoma, and front clip was brown 1986 and from Texas also. Cab and Front clip was also the '81-87 style, he wanted the more streamlined look, all we had to do to make that fit was trim the frame horns up front on a slant, to match the '81-87 bumper. It all bolted right onto the stock 1979 frame.

I suspect trying to use your cab VIN to identify and source parts is just going to frustrate you to no end since it doesn't appear to match what the rest of the truck is..
05-08-2018 07:30 AM
RWENUTS Any evidence that the frame has been shortened?

Check here for more info on your truck. Look in the index for decoding info.

Truck Parts & Truck Accessories for Chevy, GMC, Ford & Dodge Trucks
05-08-2018 04:00 AM
hanson Yes, only the cab is stock.
And the big block has switched to a little 327/307 - worst change :-(((
05-08-2018 03:28 AM
ericnova72 I miss-typed in my first response, C10 1/2 ton 2WD is a 5 bolt pattern, 5 on 5.0" bolt circle(^ bolt is 1/2 ton 4WD, K10 designation).
To correctly measure a 5 bolt pattern circle, measure from center of one stud to outside edge of the opposite stud. It won't be to the decimal point exact, but will let you determine which bolt pattern you have. From the dimensions you gave, it's the 5 on 5.0" 1/2 ton pattern.

3/4 ton will have 8 bolt wheels on both front and rear, and either 16" or 16.5" rims.

1/2 ton spindle won't accept 3/4 ton hubs/brake rotors so if it has 5 bolt front wheels it is 1/2 ton.

Sounds like you've got a built up truck, 3/4 ton cab(by VIN designation) on a 1/2 ton chassis/frame.

The pictures you posted in another thread were of the 1/2 ton rear axle housing.
05-08-2018 02:42 AM
hanson Thank for your explanation.
Is there a easy way to find out, if the front suspension is from C10 or C20?
Bolt circle front is equal to rear (4.75" or 5")
Are there differences at the spindles? I think spindle is stock (C10 or C20) with short coils (cutted and heated)
So now I want to replace the coils with 3" lowering coils for C10 (maybe from Western Chassis or Chassis Tech) But I am not sure if they are fitting to my current upper and lower arms
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