Cobalt fuel pump issue

Sounds familiar. I had similar symptoms on my Cobalt, though I didn't check the error codes myself. Rough running, stalling, the works. Did you check the fuel pump's electrical connections? Sometimes a loose or corroded connector can cause these problems. Worth a look before you assume the pump itself is dead.

Thanks for the tip. Where exactly should I be looking for these connections? Are they easy to get to, or do I need to remove a bunch of stuff to see them? I'm not the most experienced with car repairs, but I'm willing to give it a try if it's straightforward.

Okay, so on my Cobalt, the fuel pump connector was accessible after removing the rear seat cushion – it's usually held in place with a couple of clips. Once you lift the cushion, you should see an access panel. Remove that, and you'll find the fuel pump assembly and the connector. I'd still suggest taking it to a workshop, as working with fuel systems can be dangerous if you're not experienced. I did some checks myself, but eventually had a mechanic sort it out.

Thanks, I appreciate the advice. I checked the connector as you suggested, and it seemed okay. So, I took it to a workshop. Turns out, it was indeed a defective fuel pump, but the mechanic said it was likely caused by a bad connection as you suspected. They replaced the pump, and cleaned all the connectors. The final bill was 95€. Everything is running smoothly now!