The GM 2097 all aluminum radiator is an exact fit, OEM replacement for 2003 Chevrolet Z71 trucks. Manufactured in the USA using controlled atmosphere brazing, the epoxy-free core has two rows of 1.00 inch tubes and measures 28.25 inches from header to header, 17.68 inches from side to side, 2.50 inches thick, and 2.50 inches inside the header. Aluminum tanks are TIG welded to the core to provide the strongest possible bond and has a 1.25 inch inlet and a 1.50 inch outlet. Each unit is individually tested prior to shipping and guaranteed to be 100% leak free.