I have a set of factory GM Silver C6 wheels with tires. Both are used but in good condition aside from some minor curb rash on the lip. The size of the rims are 19x10 rear and 18x8.5 front. The rear tires are 275/40/19 Michelin pilot primacy and have about 75% tread left. The front tires are 245/45/18 Dunlop SP Sport 5000m and have about 60% tread left. I must say tho, the tires are just one size taller than the stock C6 tires and the rears are one step narrower (factory is 285/35/19 and 245/40/18). Its not bad though. I will take close up pics later this evening.
Direct fit on C6 Vettes, fit on 4th gen Fbody with spacers. I think these fit S-10/Blazer with a wheel spacer.

Asking $600 OBO

 

Sold!