I have a greenbrier furnace pilot lights burners do not

Hi Devinet and welcome, If you post more information you'll have a better chance of getting a good answer, post make and model number will help. Good luck

If you have a pilot light then you will have a thermocouple.

Most thermocouples are universal in nature, but if you have a pilot lit, then the thermocouple will not be the part that needs to be replaced...;)

Mark