If there is a leak int he fuel line, then the whole line or what ever part will need to be replaced.
Because of the danger of raw fuel in vapor form, I don't recommend you wait any longer. All you need to do to find this is start looking. The line goes from the engine down the drivers side, along the inside of the left frame rail and to the fuel tank.
Chevy Technician
GM Grand Master Technician 2007. 9 years Automotive experience, 7 years with GM. Just Answer Mentor