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- - 1987 GMC R25 Duelly??? (https://67-72chevytrucks.com/vboard/showthread.php?t=819318)

1987 GMC R25 Duelly???

Picked up an 87 GMC R25 Crew Cab with a duel rear end. VIN number on cab doesnt say. Did the 3/4 ton trucks ever come factory with duel rears? Or did someone add them? Also where can I find the VIN on the frame to verify that the cab matches the frame? And what is measurements for a Narrow Duel rear end versus a standard duel rear end? Thanks ahead, John.

Re: 1987 GMC R25 Duelly???

Quote:

Originally Posted by 71johnnyblazer (Post 8891731)

Did the 3/4 ton trucks ever come factory with duel rears?

Nope. One tons only.

https://www.gmheritagecenter.com/doc...olet-Truck.pdf

Quote:

Originally Posted by 71johnnyblazer (Post 8891731)

VIN number on cab doesnt say.

Dual rear wheel is not encoded in the VIN; it is an option (RPO R05) on the model.

Quote:

Originally Posted by 71johnnyblazer (Post 8891731)

Also where can I find the VIN on the frame to verify that the cab matches the frame?

It will be on the top side of the top (horizontal) flange of the frame rail, typically midway down the wheelbase (kind of under the cab/near the fuel tank).

Quote:

Originally Posted by 71johnnyblazer (Post 8891731)

And what is measurements for a Narrow Duel rear end versus a standard duel rear end? Thanks ahead, John.

Pickup dual rears stick outside of the box and require the added Dooley fenders; Cab Chassis dual wheels fit entirely within the width of the pickup box (if it had a box on it)

K