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#1 |
Registered User
Join Date: Jan 2003
Location: Mcloud,Ok
Posts: 157
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Chevy vs GMC frame?
Any way to tell them apart? Little bird told me that mine because it has leaf springs might be a GMC chassis? Any truth to this?
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No trees were killed to send this note but a large number of electrons were terribly inconvenienced. AKA. RABIDJOE... if you have to ask you prob don't want to know. Ive had my shots *dont worry* 1960 235 4SPD C30 |
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#2 |
Registered User
Join Date: Jun 2012
Location: madisonville ky
Posts: 311
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Re: Chevy vs GMC frame?
To my knowledge 60-62 chevy gmc have torsion bar front, 63-66 coil spring front. Chevy 1/2 -3/4 ton rear coil, 1-ton leaf. Gmc were all leaf rear.
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61 GMC 4x4 1-ton flatbed 4bt cummins, ranger od, sm465, np 205, d60F, d70R 4.11 10,000 ramsey PTO winch.... SOLD 73 k5 gm crate 350-265 / sm465 / np205 3.73 posi |
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#3 |
Registered User
Join Date: Oct 2010
Location: Independence,KS
Posts: 1,477
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Re: Chevy vs GMC frame?
There is no definite "all chevys were coil, all GMC were leaf" either could be ordered either way.
MOST Chevys were standard equipped with coils and MOST GMC were standard equipped with leaf springs. |
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#4 |
Registered User
Join Date: Jan 2003
Location: Mcloud,Ok
Posts: 157
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Re: Chevy vs GMC frame?
Ah got it, it was option. There is not enough of these near me to compare. lol
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No trees were killed to send this note but a large number of electrons were terribly inconvenienced. AKA. RABIDJOE... if you have to ask you prob don't want to know. Ive had my shots *dont worry* 1960 235 4SPD C30 |
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#5 |
Registered User
Join Date: Feb 2014
Location: Pocahontas Arkansas
Posts: 684
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Re: Chevy vs GMC frame?
I own a 62 GMC that has a factory coil spring rear torsion bar front. Its a GMC frame that doesn't have a vin number. I also have two Chevrolets a 70 and 72 with factory rear leaf springs. Most GMC,s do have the rear leaf springs. Most Chevrolets have rear coil springs. Chevrolet frames have the vin stamped on the frame in two places. drivers side near the front engine mount and under the cab. Ive never seen a GMC with the vin stamped on the frame.
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#6 |
Registered User
Join Date: Jan 2003
Location: Mcloud,Ok
Posts: 157
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Re: Chevy vs GMC frame?
Good to know I will lay underneath her tomorrow.
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No trees were killed to send this note but a large number of electrons were terribly inconvenienced. AKA. RABIDJOE... if you have to ask you prob don't want to know. Ive had my shots *dont worry* 1960 235 4SPD C30 |
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#7 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: Chevy vs GMC frame?
I agree with no VIN on the GMC frame. I've had 3 '60-'66 GMC's and there was no VIN that I could find.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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#8 |
Registered User
Join Date: Sep 2010
Location: Tulsa, Oklahoma
Posts: 1,925
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Re: Chevy vs GMC frame?
1. GMC FRAMES DO NOT HAVE A VIN NUMBER STAMPED ON THEM, I HAVE 2 A 65 AND A 66 AND NEITHER HAS A VIN ON THE FRAME.
2. MY 66 GMC HAS TRAILING ARMS AND COIL REAR SPRINGS, MY 65 GMC CAME ON LEAF SPRINGS SO MUCH FOR GMC'S ONLY CAME ONE WAY !!!!!! HA HA KIETH ![]() |
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#9 |
Registered User
Join Date: Feb 2014
Location: Pocahontas Arkansas
Posts: 684
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Re: Chevy vs GMC frame?
I once owned a 62 3/4 ton GMC that also had trailing arms and coil spring rear. It was a 305 V6 three speed on the collum too. It was a St Louis truck rusted completely away. I put rings & bearings in the engine & installed it in a 68 GMC two ton. Replaced the 351. It pulled great got 4 miles per gallon or less.
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#10 |
Registered User
Join Date: Dec 2010
Location: konawa ok/oakdale Ca.
Posts: 1,651
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Re: Chevy vs GMC frame?
Didn't they come with different axles too?
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#11 |
Registered User
Join Date: Feb 2014
Location: Pocahontas Arkansas
Posts: 684
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Re: Chevy vs GMC frame?
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#12 | |
Registered User
Join Date: Feb 2014
Location: Pocahontas Arkansas
Posts: 684
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Re: Chevy vs GMC frame?
Quote:
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#13 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: Chevy vs GMC frame?
Most of the '63-'66 GMC 1/2 tons I have seen had the Dana 44 rear differential.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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#14 |
Registered User
Join Date: Sep 2010
Location: Tulsa, Oklahoma
Posts: 1,925
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Re: Chevy vs GMC frame?
Here is a new wrinkle I have a picture of a 66 GMC on Air bags======ha ha
here it is on coils with trailing arms before frame off restoration. http://kieth.smugmug.com/Trucks/66-GMC/i-mFPsKZz/A also has a 12 bolt rear end and a 250 6 cylinder 66 was (first year for inline 6 I believe) http://kieth.smugmug.com/Trucks/66-GMC/i-4SdTh2t/A I still have the engine and transmission: http://kieth.smugmug.com/Trucks/66-GMC/i-T3x6Tkd/A |
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#15 | |
Registered User
Join Date: Sep 2010
Location: Tulsa, Oklahoma
Posts: 1,925
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Re: Chevy vs GMC frame?
Quote:
I was scrolling thru my build looking for pictures of the fuel tank install, ran into this sequence of 3 pictures of where gmc frames are marked, none are the serial number and since these shots were made while the body was off it makes it a lot easier to see where all the numbers are located: 1. top of frame by motor mount flange: http://kieth.smugmug.com/Trucks/66-GMC/i-GZXQvKD/A 2. side of frame under cab: http://kieth.smugmug.com/Trucks/66-GMC/i-DC3CjTx/A 3. Top of frame under cab: http://kieth.smugmug.com/Trucks/66-G...location-L.jpg ![]() |
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#16 |
Registered User
Join Date: Sep 2012
Location: Dallas, GA
Posts: 1,497
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Re: Chevy vs GMC frame?
Just found this thread while searching and thought I'd point something out.
Keith, that is actually a Chevrolet frame; the first picture is the actual VIN number of the frame, just like all my Chevrolet frames have. It appears to be 6Z153636, which makes it a '66 Fremont truck AFAIK. The trucks Old Truck Man posted are both x-frame '62's, which are supposed to have coil springs; GMC went to leaf springs in '63. ![]()
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1965 C30 pickup 350/SM420/4.10's (daily driver) thread 1968 Impala 4 door sedan (future driver project) thread Last edited by 66Submarine; 08-29-2014 at 12:40 AM. |
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#17 |
Registered User
Join Date: Nov 2013
Location: Ontario, Canada
Posts: 113
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Re: Chevy vs GMC frame?
My GMC's frame has a number stamped on it as well. My frame is currently on its side so I can only see the one number on the side at the moment.
3829589 4 12 26 110 I know 110 is the wheelbase but not sure about anything else. In regards to factory documentation I have an original Canadian 1965 GMC brochure coming and there is information on the truck having the trailing arm suspension. I can post scans when I get it. What's also interesting is that my 250 engine block has a large CANADA cast right into it above the casting #.
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1965 GMC 910 Short Fleetside. 230 CI 4-speed. |
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#18 | |
Registered User
Join Date: Sep 2012
Location: Dallas, GA
Posts: 1,497
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Re: Chevy vs GMC frame?
Quote:
Please post the scans when you get the brochure in; that sounds very interesting. My '68 Impala that was made in Delaware with a Canadian-made 307 also has "CANADA" cast into the heads (haven't checked the block). |
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#19 |
But Found Her 25yrs Later!
![]() Join Date: Oct 2010
Location: Oregon City, Oregon
Posts: 10,525
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Re: Chevy vs GMC frame?
My 62 GMC frame has Torsion bars and rear trailing arms with coils.
No vin on the frame.
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I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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#20 |
Registered User
Join Date: Sep 2012
Location: Dallas, GA
Posts: 1,497
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Re: Chevy vs GMC frame?
'62 was supposed to have coils and torsion bars like that; thanks for the extra confirmation of the lack of a VIN on the GMC stuff.
AFAIK '60-'62 all had rear coil springs with the torsion bars and x-frame, then when they made the changeover in '63 to the '63-'66 ladder frame and front coils they went to leaf springs on the rear (this is only for the 1/2 and 3/4 ton 2wd trucks, of course). |
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#21 |
Senior Enthusiast
Join Date: Feb 2007
Location: Spokane Valley, WA
Posts: 8,356
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Re: Chevy vs GMC frame?
For what it's worth, my 1960 GMC 1/2 ton short bed also has no VIN on the frame, coil rear, and came with a Dana 44.
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My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=444502 |
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#22 |
Registered User
Join Date: Sep 2012
Location: Dallas, GA
Posts: 1,497
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Re: Chevy vs GMC frame?
As a side note, in '70 and '72 you could supposedly order a C10 with leaf springs. This seems to be first mentioned in '68.
https://gmheritagecenter.com/docs/gm...olet-Truck.pdf |
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#23 |
Registered User
Join Date: Sep 2012
Location: Dallas, GA
Posts: 1,497
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Re: Chevy vs GMC frame?
Thanks for the extra info.
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#24 |
Registered User
Join Date: Feb 2007
Location: west coast
Posts: 3,369
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Re: Chevy vs GMC frame?
Interesting topic, when you talk leaf springs vs. coil, one must be very specific on years and models. There are the 4x4 models that always used leaf springs, as well as C 30s all years. Then there is the spesky Canadian built GMC's which used the Chevy chassis. Here is one thing to keep in mind. A leaf spring rear end as well as the Dana axle (GMC set up )could have been "special ordered" not a "regular available option" on Chevy's if the customer really wanted it, and a few did, especially on 3/4 tons when hauling a camper. Here is one.http://www.ebay.com/itm/1966-C20-V8-...p2047675.l2557
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#25 | |
Registered User
Join Date: Sep 2012
Location: Dallas, GA
Posts: 1,497
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Re: Chevy vs GMC frame?
Quote:
Like you said, it's probably a good idea to run through and list the types of suspension vs. model again. AFAIK: 1960-1962 GMC = x-frame with torsion bars and rear coil springs 1960-1962 Chevrolet = same as GMC 1963-1966 Chevrolet = ladder frame and coil front and rear springs 1963-1966 GMC = ladder frame and front coils with rear leaf springs (only applies to 2wd 1/2-3/4 ton trucks made in the US) 1 ton/C30/2500 (and up) trucks all had leaf springs on the back and 4x4's all had leaf springs all the way around. Starting in 1968(?) you could order leaf springs as a standard RPO option on 1/2-3/4 ton 2wd Chevrolet trucks. Apparently, you could also special order a Dana 60 GMC rear that came with leaf springs under a Chevrolet C20, at least in '66? At least some plants in Canada seem to have built GMC's on Chevrolet frames? |
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