C20 C30 question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Seanext** · 03-05-2021, 10:46 PM

Not trying to start a verbal war here but I have a question. I found what is listed as a C20 but it has dual rear wheels and matching front axle. Looks like a C30. I ask the guy to check and the VIN and the VIN tag matches the frame and SPID. It is not a restored truck and looks from pics he sent to be all original. The SPID has a funny RPO of 4359AA local gas company and 4359AG local gas company on the other side. Could they have ordered a C20 with a dual rear wheel? Never seen or heard of it but because of the special RPO was wondering. The Gas company name is printed on the SPID and they are a very large company in this area.

gmc684x4 · 03-05-2021, 10:52 PM

Is the 3rd digit a 2 or a 3
If its a 2 it is a 3/4 ton
If its a 3 its a 1 ton
CE3xxxxx

hugger6933 · 03-05-2021, 10:59 PM

Sounds like somebody may have worked it over to suit them. That happens like a gazillion times a day. Jim

**Seanext** · 03-06-2021, 01:00 AM

It is a 2

**Sheepdip** · 03-06-2021, 11:50 AM

Any Pic's? Is it a pickup bed style or cab n chassis? There was a dual rear wheel option available on the 3/4 tons but it was delivered as a cab n chassis truck.

**Seanext** · 03-06-2021, 03:03 PM

Yes this is a cab and chassis with a dump bed.

**Sheepdip** · 03-06-2021, 04:24 PM

If the Vin, Frame, and SPID#"s all match there should be a "RO5-DR Wheel" option on the SPID.

68Gold/white · 03-06-2021, 04:34 PM

Could have been an old rework of a C20. Back in the day, a previous owner may have made it into a C30, using ALL OEM parts...maybe

Chevrolet pickups have such an unlimited range of interchange ability, it's likely an easy thing to do...

**D.PASSMORE** · 03-06-2021, 04:49 PM

Quote:

Originally Posted by Seanext

Not trying to start a verbal war here but I have a question. I found what is listed as a C20 but it has dual rear wheels and matching front axle. Looks like a C30. I ask the guy to check and the VIN and the VIN tag matches the frame and SPID. It is not a restored truck and looks from pics he sent to be all original. The SPID has a funny RPO of 4359AA local gas company and 4359AG local gas company on the other side. Could they have ordered a C20 with a dual rear wheel? Never seen or heard of it but because of the special RPO was wondering. The Gas company name is printed on the SPID and they are a very large company in this area.

You say "matching front axle" if its a 4x4. They didn't make a 4WD c30 back then.
I bought my C30 2WD with a mid 70's dually 14 Bolt / disc front brakes spindles set-up. Some PO had R/R 'd the OE Eaton HO72 and front drum brakes. It works...

**Seanext** · 03-06-2021, 06:27 PM

Sorry didn't mean to imply that it was a 4X4. It has 2wd front end with disk brakes.
But it has the hubs, and wheels that match the dually wheels in the back like a C30

**Seanext** · 03-06-2021, 06:30 PM

Correct me if I am wrong, but weren't the C10 and C20 frames the same and the C30 was a little thicker material and the channel wider? I have all 70-71 4X4's so not as up to date on the 2wd trucks.
But a 71 dump truck would be way to cool to take around to the local car shows.

**D.PASSMORE** · 03-06-2021, 07:03 PM

Quote:

Originally Posted by Seanext

Correct me if I am wrong, but weren't the C10 and C20 frames the same and the C30 was a little thicker material and the channel wider? I have all 70-71 4X4's so not as up to date on the 2wd trucks.
But a 71 dump truck would be way to cool to take around to the local car shows.

Yeah on the C30's. I like tooling around in my C30. Just got turn wider, the dually tires like to jump curbs.

gmc684x4 · 03-07-2021, 01:34 AM

67 72 C30 frames are also shaped like a 4x4 frame back of the cab more straight then a c10 c20 where they bulge out at the rear axle

learn something new about these trucks never knew you could get a c20 dully in a chassis model

03-05-2021, 10:46 PM	#1
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 586	C20 C30 question Not trying to start a verbal war here but I have a question. I found what is listed as a C20 but it has dual rear wheels and matching front axle. Looks like a C30. I ask the guy to check and the VIN and the VIN tag matches the frame and SPID. It is not a restored truck and looks from pics he sent to be all original. The SPID has a funny RPO of 4359AA local gas company and 4359AG local gas company on the other side. Could they have ordered a C20 with a dual rear wheel? Never seen or heard of it but because of the special RPO was wondering. The Gas company name is printed on the SPID and they are a very large company in this area.

03-05-2021, 10:52 PM	#2
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: C20 C30 question Is the 3rd digit a 2 or a 3 If its a 2 it is a 3/4 ton If its a 3 its a 1 ton CE3xxxxx

03-05-2021, 10:59 PM	#3
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,257	Re: C20 C30 question Sounds like somebody may have worked it over to suit them. That happens like a gazillion times a day. Jim

03-06-2021, 01:00 AM	#4
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 586	Re: C20 C30 question It is a 2

03-06-2021, 11:50 AM	#5
Sheepdip Senior Member Join Date: Nov 2018 Location: Waterford California Posts: 2,375	Re: C20 C30 question Any Pic's? Is it a pickup bed style or cab n chassis? There was a dual rear wheel option available on the 3/4 tons but it was delivered as a cab n chassis truck.

03-06-2021, 03:03 PM	#6
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 586	Re: C20 C30 question Yes this is a cab and chassis with a dump bed.

03-06-2021, 04:24 PM	#7
Sheepdip Senior Member Join Date: Nov 2018 Location: Waterford California Posts: 2,375	Re: C20 C30 question If the Vin, Frame, and SPID#"s all match there should be a "RO5-DR Wheel" option on the SPID.

03-06-2021, 04:34 PM	#8
68Gold/white Registered User Join Date: Sep 2011 Location: Ark City, Kansas Posts: 3,278	Re: C20 C30 question Could have been an old rework of a C20. Back in the day, a previous owner may have made it into a C30, using ALL OEM parts...maybe Chevrolet pickups have such an unlimited range of interchange ability, it's likely an easy thing to do...

03-06-2021, 06:27 PM	#10
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 586	Re: C20 C30 question Sorry didn't mean to imply that it was a 4X4. It has 2wd front end with disk brakes. But it has the hubs, and wheels that match the dually wheels in the back like a C30

03-06-2021, 06:30 PM	#11
Seanext Senior Member Join Date: Mar 2013 Location: Dallas NC Posts: 586	Re: C20 C30 question Correct me if I am wrong, but weren't the C10 and C20 frames the same and the C30 was a little thicker material and the channel wider? I have all 70-71 4X4's so not as up to date on the 2wd trucks. But a 71 dump truck would be way to cool to take around to the local car shows.

03-07-2021, 01:34 AM	#13
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: C20 C30 question 67 72 C30 frames are also shaped like a 4x4 frame back of the cab more straight then a c10 c20 where they bulge out at the rear axle learn something new about these trucks never knew you could get a c20 dully in a chassis model



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