Leaf or coil standard rear spring on GMC?

[71CHEVYSHORTBED402]

Originally Posted by Mike C

I think one that that I don’t remember being referenced is that over time GMC became much less it’s own thing and much more just like the Chevy’s. So a ‘72 GMC is most likely equipped almost exactly as the Chevrolets while a ‘69 is more likely to be more of its own thing. Whatever that is.

I have owned 4 C2500 GMC, and they all have different GVWR and they all had leaf springs. They also all had Dana 60 rears. A 69 small block TH400, a 70 Longhorn small block SM/465, a 70 250 3 speed, and a 70 Sierra Grande 402/TH400. None of them had Leaf Spring on the SPID.

And then I have the 71 C1500 which is on coils. It’s a 402/TH400 truck and spring type is not listed on the SPID, but that jives for a Chevy of that same vintage.

My ‘69 short step C10 is a leaf spring truck with 307/TH350 and it is on the SPID. A parts 69 short step I have is a 250/3 speed truck on coils and they are not on the SPID.

So earlier GMC seem to follow the leaf thing and the later ones seem more likely to be coil in my small sample informal analysis.

And the Canadian trucks? Who the heck knows what’s going on there.

Makes some sense of it.

I can only speak for two trucks personally, both after 1970.....99% sure the 71 SWB was special ordered with rear leafs by the dealer, for a specific customer.

I think the random plate matching both engine badges is called irony..Destiny?