Nosie coming from front of the car. It is a new used car 2005 chevolat cobalt we have only have this for a couple of days fromthe dealership and it was not there when we did a test drive and now it is.

It sounds like the catalytic converter might have come loose causing a loud exhaust leak. Did they repair the problem that caused the converter to plug up like a defective oxygen sensor or coil pack?

seems to be a faulty sensor on the head.Check with main dealership as although 6 years old,there are a few faults appearing that are common to the model.This may be one of them.
I hope this helps or get back to me and I will do some further checking on vehicle specifics,sensors,ecu and wiring.

YOU HAVE TO ORDER TRANSMISSION OIL PAN AT A TRANSMISSION SHOP OR DEALERSHIP.

I work for a Chevrolet dealership and am appalled that they couldn't or wouldn't help you. The noises in the Cobalt, HHR, Malibu, and any other ELECTRONIC POWER STEERING car that GM builds are too common to not know what is wrong!!!!

This is a bulletin for the noise issues:
#04-03-08-006D: Steering and Front Suspension Noise Concerns
This bulletin is available to any dealership to view. The tool used to find noises is called a chassis ear. It is a required tool for the dealership. Again no excuses for not finding the noise.

The most common issues are the intermediate steering shaft, steering rack, control arm bushings, and steering column. There are other things that can cause noises but these have been most common since 2005. Again there is no excuse for not knowing the car.

My advise is to try a different dealer and give them the bulletin number above, and good luck to you.

any mechanic with a quality scanner can help you solve this problem, get the codes from the computer and get back to me and we'll go from there. Please rate my fix as i strive to be the best,need more help get back to me Thanks Ray

make sure the gas cap is on tight. vapor recovery system depends on the closure of the gas cap. if that did not solve your problem, I would suggest to get a new gas cap first, before going to the dealer or any repair shop for a turn-up.

i went to advance auto and they pulled the check engine light code and they said it was just wet electrical equipment from all the rain we have had and that it would dry out in a couple of drives so they reset the code and told me to come back in if it comes back on.

There are only 2 things you can try to fix this yourself: turn off the engine and open the driver side door (to turn the radio off). Wait 5 minutes, start your car.
If that does not solve it, turn off your engine, disconnect the car battery, wait about 5 minutes. Reconnect the battery (negative pole first - black connector) and try your radio again.

If neither one of these two fix your problem, I am afraid only a GM service center or dealership can fix the problem. The Cobalt is notorious for all kinds of electrical issues.

Thanks for using the fixya forums!

This happened to me many different times. The dealership kept telling me that it was condensation and that I needed to get a new cabin air filter. I went to another shop that said it was a major issue that needed to be taken care of at the dealership under warranty...

Finally, I complained at the dealership that this was a repeated problem. They looked at what they called a "check sheet" (recalls that they don't notify the customers of) and determined that there was a certain gasket that was never put on at the factory.

They put on the gasket, and I haven't had the problem since.