Originally Posted by MouSe

1. I don't have a way to properly heat the hard plastic line to get a barbed connector in there.
2. I don't have all my tools anymore, my ex-wife either sold them or gave them away.

I've seen multiple reports of using the silicon tape used on fuel lines with 0 problems.

Originally Posted by yutzybrian

I have a porter-cable heat gun. Would be perfectly safe as long as you don't crank the temperature to max

Originally Posted by GunsOfNavarone

Compnine and another allow you to break down most everything to identify part numbers. Also, I bought fuel lines for a Blazer off of Ebay from a guy who strips Blazers for a living. Paid $30 for all three lines.

I think you have some options to replace the entire line rather than install a patch if you so desire. I have been doing some searching for parts for your truck, but DOD computer syatems bloack many sites.

Originally Posted by GunsOfNavarone

Guess Compnine is no longer in the part sales business.

Here is a ebay lisiting for a brand new fuel line with part number for a 2004 Silverado. Not sure if it is a match for your specific truck or if it is the line you are in need of.

http://www.ebay.com/itm/GM-Tank-Fuel...#ht_500wt_1287

Here is a fuel return line:
http://www.ebay.com/itm/2004-2009-NE...ht_5903wt_1037