Ok here is my problem my 07 chevy impala lt radio is not working however when i hit the clock button it shows up but then goes a way i also have no warning chimes
either ...i have tried 2 different radios one was another stock radio from a 06 impala did the same thing ....then i got a after market radio and harness and hook it up and now power at all
im in search of serious help i need a radio or cd player

 

Check your fuses. There are 2 power sources going to the radio. One that stays on all the time and one that turns on with the key switch. Make sure they both are powered.