Leaking diesel on driver side.

[Hdl]

I have a 2013 duramax 3500HD. Its tuned and deleted with a Fass lift pump. I keep having leaks on low pressure return lines. I replace one, and then another will leak within a few weeks. 150,000 miles on the truck and I am the only owner. Not sure what keeps causing these leaks, but it sure is getting old

 

[2004LB7]

Seems like you may have a restriction or blockage on the line causing it to build excessive pressure. Look for kinks or degrading hose lines by the engine and above the tank

 

[zakkb787]

Which return lines are you talking about? The ones that come off the injectors? If so what brand are you using because dorman ones from the parts store are sh!t and leak. Factory GM is the only ones you’ll have any luck with. Make sure you live the o rings on them slightly when you pop them in and make sure the clip is positioned perfectly or it will leak as well