Chevrolet Cobalt Repair Questions

Cost To Repair Powers Steering on 2007 Cobalt
You answered this question on a car with 31000 miles and i was wondering if mine was under the same warranty due to my mileage. I dont know...
 
Ecotec Engine Damage
My Cobalt with the 2.2L Ecotec has a bad engine after an oil change. Is there a service bulletin for problem with the oil filter O ring tearing or rolling and causing damage
 
2006 Cobalt Rough Idle
My car has a check engine light and the idles is very rough. The engine hesitates when stepping on the gas pedal. It if driving, just a bad idle.
 
2008 Chevy Cobalt Humming Noise
My car has a humming noise when driving. At idle there is no noise. It gets louder the faster the car goes. Can this be a hub bearing or the transmission?
 

2005 cobalt 2.2l p0171
Autozone scan code p0171 lean.
 
Check Engine Light
My 2006 Chevrolet Cobalt. Is it safe to drive like this.
 
2008 Chevy Cobalt 2.4l misfire
has SES light lean and misfire codes.