I'm with George and Don here, the best thing to do is replace the lines in their entirety.

You're a victim of "Ohio Fender Solvent", and the "good" sections will be rotted out in short order.

 

If your going to repair it with rubber use fuel injection rated hose with fuel injection hose clamps. It will hold up to the pressure and fuel. You can get it at almost any part store.

An even better repair is to use compression fitting and steel tube to replace the rusted section.
The only hang up with compression fittings is they have to seal to clean part of the old line that don't have scale rust on it.

 

But, liability issues....... not to say I would not do it.
You must replace the entire piece. Nobody connected with this site ever recommended any other fix. RIGHT?

 

I would not recommend an unapproved repair to fuel lines. Fuel line compression fitting are approved for fuel line repair. The repair kits are sold in most part stores.

You can repair plastic and steel lines or you can replace the connector ends depending on what kit you get you can even build your own line assembly.

You are legally allowed to repair and make up fuel lines because automotive manufactures are not required to offer a factory replacement.
Some do offer replacements but the mandate can be met with bulk materials and fitting kits.

Some manufacture show in there part replacement books for fuel and brake line a size of the line and a note that it is replaced in a bulk roll.

 

That's what I meant!

 

Great, now mine is leaking after reading this post a couple of days ago!

2006 with 240,000 miles on it. Same place right at the black plastic clip where all the salt from the winter collects...yes I'm in Michigan too.

Dang it!

 

Mine has corrosion issues also was leaking like a sieve. Went to Dealer and it cost me $699. and I kept the lines. They couldn't tell me how long it would take to fix "Not in the book" so could cost over $1004.00 quoted then would go to $75.00 per hour on anything over eight hours. Called GM Help line and not much help. I remember somewhere hearing the 2007 Cobalt (Same frame) had a recall on fuel lines.

 

Why a Dealer? They are not magic, I image that any shop in Fla would have experience with corroded fuel lines AND brake lines (hint hint).

Somebody recently claimed that Fla was not prone to corrosion.

I recently have seen the under carriages of a few cars in VA that looked like the lived in the surf, 2 of them were getting entirely new brake systems and fuel lines.

 

Fuel and brake lines rusting is a huge safety issue. Looks like another one for NHTSA. ALL fuel and brake lines on motor vehicles should be required to be made of stainless steel. GM pickups have the same problems as do many vehicles on the road today. I purchased a complete set of stainless steel brake lines for my pickup for $220.

 

Life in the "Rustbelt" kills cars and trucks with alarming rapidity.

We have new neighbors who've moved to NC from Rochester New York, their 2011 Civic has rotted off door bottoms, and holes in the floorpan.

Their '05 Tahoe suffered a cracked frame halfway through Virgnia, they were forced to go from a U-Haul trailer to a box van. The Tahoe went to "Truck Heaven", luckily they were just accelerating back onto I-81 when it buckled, otherwise things could have been very interesting.