Size of radiator

it's listed in your owners manual under specifications and capacities. if you don't have your owners manual,copy and paste the link below for a free download owners manual,or just go to a parts store,they have that info in their computer system. https://my.gm.com/content/dam/gmownercenter/gmna/dynamic/manuals/1997/pontiac/sunfire/1997_pontiac_sunfire_owners.pdf