Why do my tail lights not work on my 2000 gmc sonoma? on 2000 GMC Sonoma

Blew the fuse. I changed it and it blew it again the next day.....

Asked by for the 2000 GMC Sonoma
There is a direct short to ground in the system. Do you pull a trailer? Do you have a trailer connector? If so, the problem may be in that connector.