I need help !!!

I have a 98 grand prix gt that the blower motor quit working on wondering where and and about how long it would take to change any info would be greatly appriciated

Did the blower motor quit or will the switch not turn it on? If the blower quit gradually then you need to replace the blower motor resistor located under the dash next to the fan motor. The resistor costs about $40 at a dealer and will take about an hour to change. If the blower itself went then get one from a wrecking yard, about $25 takes three screws to remove. The resistor is located next to the fan so replace it at the same time.