Were GMC leaf springs an option?
 

I have heard that GMC had leafsprings standard and you could option for coil overs. Chevy was the other way. I have a 69 GMC and the spid says under the options G70 for leaf springs. Can someone more learned than me explain this?

Re: Were GMC leaf springs an option?
 

From 1963-68 GMC did not offer rear coil spring suspension, they actually didn't like the way it worked because suspension travel was limited. By 1969 rear coils were available again but this was due to some GMC trucks and all suburbans were being produced by Chevrolet.

Re: Were GMC leaf springs an option?
 

So if Chevy built the truck they may have been thinking option for leaf springs instead of standard. That may explain the option code on the SPID.

Re: Were GMC leaf springs an option?
 

G70 was a suspension package.2000 lb (each) leafs,12x2 1/2 brakes,HD shocks, 4.56 Dana rear (with certain engine/trans combos).

Re: Were GMC leaf springs an option?
 

Another ? then. Why would that option be on a shortbed stepside. Seems like that would be a 3/4 ton option. The spid and the cab have the same vin. on them. I am going to go look at the frame and see if it matches the vin.

Re: Were GMC leaf springs an option?
 

:gmc2: Just for curiosity which assembly plant was your truck built? Check for these letter codes in your VIN: F,Z,P,S,J for starters.

Re: Were GMC leaf springs an option?
 

In Canada all 67-72 Chev and GMC were typically coil but could be optioned either way.

Re: Were GMC leaf springs an option?
 

69 was an odd year, coils were standard on 1/2 ton GMCs. I have a paper somewhere that I have posted a few times on here that shows this as fact.

Re: Were GMC leaf springs an option?
 

After reading many posts and threads on this subject, I am convinced that
all the '67 - '72 2wd half ton trucks (GMC and Chevy) came with coil springs standard. Leaf springs were an option as your SPID shows.

Re: Were GMC leaf springs an option?
 

GMCs were ALMOST all leaf springs, however it was still an option. The coil was standard, just not par for gmc trucks.

Re: Were GMC leaf springs an option?
 

It was prolly a heavy duty package for the half ton vs the three quarter ton

Re: Were GMC leaf springs an option?
 

Don't know why it was on a C10 but here's the C20 info in case nobody believes anything I say;

http://i134.photobucket.com/albums/q...r/IMG_0522.jpg

Re: Were GMC leaf springs an option?
 

Engine is long gone but it was a 6cyl because of the vin. and 3.73 rear end, but according to that document it should have had a 4.56 rear. Its says 250,292,307 and 350 engines would have 4.56 gears. If I read it correctly

Re: Were GMC leaf springs an option?
 

Also it has the 11" brakes. I suppose someone could have switched the rear axle. Does the axle have the vin like the frame,cab and SPID?

Re: Were GMC leaf springs an option?
 

So does the frame VIN match the cab's?-or did I miss that post?

Re: Were GMC leaf springs an option?
 

your GMC is a 1/2 ton. 3.73 is the base gear ratio for all 3 speed manual shift 1/2 ton trucks if memory serves... 4.56 is the base gear ratio for all 3 speed manual shift trucks in 3/4 ton.

Re: Were GMC leaf springs an option?
 

C S 1 0C-1 A is the vin. 2wd 6cyl 1/2 ton fenderside. The GMCpauls gmc data dosen't list 1 for a plant but the Chevy data says 1 is Oshawa. where ever Oshawa is.

Re: Were GMC leaf springs an option?
 

Also the vin matches on the frame, cab and Spid.

Re: Were GMC leaf springs an option?
 

GMC decodes differantly than chevy, look here; (69 only, other years differ)
http://67-72chevytrucks.com/gallery/...0/bullsht2.JPG
http://67-72chevytrucks.com/gallery/...00/bullsht.JPG

Re: Were GMC leaf springs an option?
 

:gmc2: Wrong!!!!! Other than GMC suburbans that were built by Chevrolet starting in 1967, 67-68 GMC pickup trucks came standard with leaf springs, rear coils were not available according to all the factory GMC literature, I never seen a 67-68 GMC with rear coils as well .

Re: Were GMC leaf springs an option?
 

That excludes 67-68 Canadian built GMC trucks they were built by:chevy:

Re: Were GMC leaf springs an option?
 

Re: Were GMC leaf springs an option?
 

I've always heard that GMC all had leafs, and chevy had coils. But chevy also had leafs on the heave half tons , and leafs on larger trucks. I've never seen a GMC with coils. I've had alot of these trucks and still do, but I do have a Chevy 1/2 ton with leafs.

Re: Were GMC leaf springs an option?
 

there is no such thing as a heavy half untill the late 70's and by then they were all leaf.

Re: Were GMC leaf springs an option?
 

Mine only has leaf springs also.