1979 GMC C6000 Rear Brake Shoes

[jmbryant44]

Does anybody know what size rear shoes this truck would have or how I could tell without taking the drum off first? Looks like they could be 15x4, 15x5, 15x6. Any help would be an appreciated. I do know the fronts are 14x2.5. Concerned about finding them as well (especially if they are the smaller 15x4.

 

[TerryfromSWIowa]

you need to look at the drum on the rear and get a tape measure to get an idea of width. none of these pictures will get you any where.