The K1500's got those 12-slotted steel 16's, not sure if the C2500 light duty came with the same ones. I think the backspacing is a little different on the slotted. The very few steel 16's I've seen on C2500 LD's were completely plain without the slots, painted silver, and had the plain black center caps. My red/white '88 C2500 LD parts truck I had during the rebuild of my '92 had them, and my black '94 C2500 LD had one as the original spare. Don't see too many of them as all the other C2500 LD's I've owned/seen already had wheels swapped with aftermarket, or later model OEM.
This was the spare from my '94 C2500 LD - essentially the same wheel as a plain steel 16" 8 lug from a regular C2500, but 6 lug instead..
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What's funny is this plain wheel is so "rare" it doesn't even come up as a choice on car-part's "Wheel w/image" search, only the slotted one.
Richard