Hey I have a 05 chevy monte carlo coupe, and I just installed a new radio and speaker system. It ran fine the day I installed it, but this morning my security light came on, my gas gauge, rpm and speed doesn't work. PLEASE HELP ASAP!

 

what is it with this.... yesterday morning MY monte refused to start and had the security message glaring at me. then after waiting for it to stop flasing it started. this happened a year ago nearly to the day.

any one else?