Ok I have researched this and am finding nothing, does anyone have a sure way to tell the difference between a v6 radiator and a v8 radiator? I have "heard" that the v8 is heavier duty, but I have not seen the two side by side, I am possibly going to have to replace mine due to allot of "junk" getting into the thing, (thanks to a bad 40K rebuilt motor by somone on the boards that I'll keep nameless)
So anyway if anyone knows how to tell the two apart feel free to post your knowledge on the subject.

 

I had the V6 before I got the Z28 I had now, and I don't remember them looking any different, I didn't take a good look at the old one to compare it, but I'd say that they're probably the same. I just looked on Advance Auto's website, and the V6 and V8 radiators have the same part number so they're probably the same.

 

The v6 (96 3.8 iirc) radiator i saw had the low coolant sensor plugged, the fitting was there it just wasnt open while naturally the v8s have an open hole in the fitting.

 

call your local gm dealership(parts center) and ask if they are the same part numbers