definitely a leak in the line and definitely related. Get up in there and start sniffin.

 

Unfortunately I can "sniff" it without crawling underneath... it should be going into the shop this weekend... I just wanted to go in having some idea of what the problem was so I wouldn't have complete shock when I get the Bill... :shock:

 

Are you 100% sure it's gas?

Gas should evaporate so there wouldn't be a puddle.

I would make sure it's not your brake line because that's where alot of brake lines blow, right in between gas tank and the frame.

 

The lines on my 2001 were going, first it was the return line, then a half year later it was the supply line.
They started leaking at the junction between the steel tube and the flexible tube.
The return line they fixed with compression fittings and a short section of tubing. This is not really the right way to do it, but I was trying to avoid the big expense of replacing the lines completely, since they expected that to cost an arm and a leg.
When the supply line went I got new lines from linestogo.com and the "repair" sections of nylon line to connect to the fuel sender. The stock lines are one piece, and not meant to be installed with the body on, but the aftermarket ones are two piece, so they can be snaked into place much easier. I do not know what the replacement GM lines are like, they might also be two piece.

 

Are you 100% sure it's gas?

Gas should evaporate so there wouldn't be a puddle.

I would make sure it's not your brake line because that's where alot of brake lines blow, right in between gas tank and the frame.

Yeah, definitely gas. I was finally able to crawl under the truck tonight after work, now that it finally stopped snowing a raining for a while. It looks to be running down from the top of the tank and dripping from the gas tank shield under the tank. Can't really see which line is the problem though. I'm pretty sure it's going to cost me a few bucks to fix, but hey... it's only money, Right?! I'm pretty sure once this problem is fixed it will take care of my EVAP code too... hopefully! :? I'm calling my local shop tomorrow to see when they can get it in. I will post what the outcome is. Thank you all for your inputs...

 

A little update on my truck.... I stopped by local repair shop a couple days before Christmas and he told me to stop in the following week and they would take a look at it. Dropped the truck off a few days ago. Come to find out it is the fuel pump that has a crack in it and the line is also rusted from it. When the truck is started it starts spraying fuel on the underneath bed of my truck. I need a new fuel pump and lines, therefore they need to drop the gas tank, replace the tank straps... install fuel pump and lines. Estimate is between $600-$700. I drop the truck of this Friday to get the work done. This work will also take care of my EVAP code so I can get it inspected too.

 

Out of curiosity why do they need to replace the tank straps?

 

I think I have a similar issue and just updated a post from last year that I started. It got real when it was overflowing from the top of the tank. There are two lines that you can see between the bed and the cab. Are these the lines you have issues with? I am trying to figure out what it is called.

 

Bryan... To answer your question about the straps, it is because one strap was actual broke. They sell them in pairs, so better to replace both as to not have to deal with the problem again.
Yingpin... I haven't actually been under the truck to see the lines that were leaking along with the fuel pump. I do believe from my mechanics explaination, that those are the two lines though. I'm having my lines replaced with new poly-lines. They are using them now on other vehicles and are DOT approved. I won't have to worry about those lines rusting again. :mrgreen:

 

Ok...that's makes sense. I was just curious if they were now a one time use type thing or some new safety regulation, and as stupid as that would seem, it wouldn't really surprise me.