neeed help

ok so i have a fuel leak in my 97 cavalier and i know where it is comming from and my brother told me to put new o-rings on it problem is i dont know how so can anyone gimme some help please

Which O-rings? Anyway, it is real easy. Do you have the O rings yet. If not when you go to the parts store check a Haynes manual for detailed info and photos. You simply remove the part in question, clean it well and push the new O-ring on. Then reinstall.