08-09 Pontiac G8 Radiator AT. These COLD-CASE radiators are Tig welded 100 percent aluminum and absolutely beautiful. Cold Case high-quality replacement radiators for GM vehicles are engineered with two oversized rows that perform as well as traditional 3- or 4-row radiators. Each Cold Case direct-fit aluminum radiator is made to factory specs, TIG-welded and features OEM stamping.