04 grand am gt

do these cars have timing chains or timing belts? my wifes car has about 85,000 on it now, and i was thinking if it had a belt it should probably be changed... right????? if it does have a belt, does anyone know how many hours a shop will get to change it?

I assume this is a V6 and they have timing chains, no belts, and a chain should last close to 200k miles if the oils been changed regularly.