[eagleuh1]

I bought a replacement 4 core from Autozone when mine starting leaking in Pheonix Az. It was about $200 if I remember right. It cools my 5.3 just fine, even while towing 5000 lb travel trailer. It was a brand made in Canada, they also make gas tanks. It had the tranny cooler inside also. Fit well, except the channels on top and bottom were wider, so my alum shroud was closer to engine. The mounts with rubber pads might need changed if you go with anything but what yours came with, IE 4 core vs 2 or 3 core. Good luck. Jim.