hi, i have a 2006 chevy cobalt lt 2 dr coupe and it comes with remote keyless entry.
today i was going to replace my stock stereo however i was having some trouble so i put my stock stereo back in

now my remote keyless entry doesnt work..anyone have any ideas as to y

 

were you messing with any of the wires when you had truoble?
You should be able to re & re the radio without any issues.
Check for any blown fuses, then try to d\c the battery for a minute then try it again