I connected the battery on my Chevy Aveo 2005 wrongway round now car wont start

SOURCE: rear brake lights wont work on our 2005 chevy aveo ????

It sounds like you should check for power at brake pedal switch. Hook up a test light to the switch and press the brake pedal. If the light does not go on and you have power in the wires to the switch then the switch should be replaced.
I hope this helps you out

SOURCE: 2005 aveo won't start after sitting

battery may be shot, take it to a local parts store for free testing. if it's not that then it may be a charging issue or a short somewhere.

SOURCE: 2005 Chevy Aveo - engine light and hold lights flash

I also had the same problem, But the problem lies in the switch the actual hold switch on my aveo there is a side entry way you can pop off the one on the left will give you access to the switch. what could of happen is theres is condensation in inside the switch. then when it gets cold it freezes causing the switch to malfunction. This could happen either by spilling something on the switch or using a cleaning solvent like armorall, YOU MUST BE CAREFULL WITH ANYTHING LIQUID NEAR THE HOLD SWITCH. Also the car going from warm when you drive then cold when you park it at night. My car was in warranty and remind you I came up with is the dealership had no idea what was wrong. they reseted the computer it worked for a week then was happening again. I have knoweldge in switches/wiring so i decided to check pot the switch and open it up and sure enough there was condensation took it to dealer told them to try a new switch works perfect and going on 5 months with out problems. Replacing the switch can solve pretty much every problem that is stated here i think. Also take a look at the wiring and connections for older aveos

SOURCE: 2005 chevy cobalt, car wont start ... check

disconecting the battery should reset the pcm. but you will need to find out what caused the problems.

SOURCE: 2005 Chevy aveo will turn over but wont start

My 2004 Aveo would turn over but never would fire. I had plenty of fuel pressure but no spark. After a few hours of scratching my head and some research I replaced the crank positioning sensor. It fired right up and has been running great since.