1999 Pontiac Grand Prix temp. gauge and radiator fan not wo

hi, i just bought a 99 grand prix gt, driving it for a while notice that the temperature gauge is not working at all. the radiator fan is not even working, i turned on the a/c to the max and the fan is not even turning on. so, i check the relays and fuses but they are all good. im kinda in a hole right now because both of them are not working fan and temp. gauge at the same time. im afraid that it might over heat without me even knowing it and damage the vihicle. any suggetion would greatly be appritiated. thank you very much....