LB7: Fuel leak only when tank is full.

[gsx4speed]

I have a 2001 Silverado extended cab with a fuel leak at the front of my gas tank, but only when the tank is full. At first I thought it might have been the filler neck but the leak Is farther forward then that. I wouldn't think that any of the lines would do that since I should see it leak all the time if that were the case. Does anyone have any ideas what might cause this? I have not dropped the tank yet, i wanted to try to get an idea of what it might be before I do that.

Sent from my Nexus 5X using Tapatalk

 

[Awenta]

Lift the bed instead of dropping the tank. It's either the lines or the seal around the sender itself.


Sent from my iPhone using Tapatalk

 

[CarolinaHD]

Removed the bed bolts and block it up off the frame a few inches, it's either the vent or a bad quick disconnect.

Treed! Lol

 

[gsx4speed]

Is there anything at the front part of the tank? The sender is farther back from where the leak is.

Sent from my Nexus 5X using Tapatalk

 

[CarolinaHD]

The fuel cooler, supply, and return lines all run around the front of the tank. Have you even crawled under to look at it?

 

[gsx4speed]

I did briefly to see if I could see any obvious reasons. About a year ago I replaced one line in the front by the cooler, but this time it is higher where I can't see it. But why does it lack only when full?

Sent from my Nexus 5X using Tapatalk

 

[gsx4speed]

I did briefly to see if I could see any obvious reasons. About a year ago I replaced one line in the front by the cooler, but this time it is higher where I can't see it. But why does it lack only when full?

Sent from my Nexus 5X using Tapatalk

Leak*

Sent from my Nexus 5X using Tapatalk

 

[CarolinaHD]

I would say either a hole was rubbed in the tank or its leaking from the sending unit area and running off the front of tank. Really just a guessing game at this point.

 

[gsx4speed]

Thank you all I will take a harder look to see what the problem is. Thank you for giving me ideas

Sent from my Nexus 5X using Tapatalk