hi my girlfriend has a 05 cobalt ls and it wont start. battery and fuses and relays good. i cant check the starter yet, what could it be besides starter?

 

broken key

 

how do u know the battery is good?

 

checked batt already i know its good. was replaced like 2 months ago anyways. key sounds like a winner though. im gonna find that out. thanks for help

 

is there any crank?? does the dome light turn on?

if ur dome light doesnt turn on...its clearly the battery...

 

No crank and no start. Has to be either the battery or the starter. Tap on the starter with a hammer while someone is turning the key.

 

hahaha had to do that with my blazer

 

Check the fuel pump relay to see if its seated properly.
Also this connection below.

First thing before deep diving into the diagnostic, please check for a possible loose terminal at the Underhood Bussed Electrical Center (UBEC) for the fuel pump power supply. There have been reports that this terminal for circuit 120 (Gry) has been loose at the UBEC.

At leat give the underhood fuse box a continous rap or shake while trying to start the car.

 

does the vehicle do anything? Does it make a loud click when you try to start it? If so its most likely the starter. Are there any lights (dome light, dash light, Check engine light)? If not then its most likely a poor battery connection or popped fuses.

 

Make sure the connections at the battery are good. You can try disconnecting the battery for a few minutes then reconnect it. It will clear any codes and if the car isn't starting due to a sensor malfunction it should start up now.