Rim's from 98 on a 2000?

I've got a 2000 silverado (disc brakes on the rear) and I'm trying to get a set of winter rims. Had bought a set with tires for dirt cheap, thought they'd fit, turns out not. Clearance issue with the brake calipers (as you probably know). As it turns out they were off an older silverado.

What i'm trying to find out is exactly what WILL fit. I'm assuming just rims off a NBS truck? I've got a line on a cheap set of aluminum rims off a 98 z71, but I'm thinking they wont fit either. I'm dealing with all 16"wheels here as well. I did a search, and cant seem to find what I'm looking for.

thanks guys,

Evan