when backing up on concrete there is a squeaking sound coming from the front of the car

I had 4 chevy colorado and they all had the same problem with the horn first its sounds weak and second I have to press hard on the steering wheel for it to sound

While I was driving this morning I used the steering volume control and the radio/infotainment screen went black with no sound out of speakers

Radio turns on but no sound for radio or blinkers

No sound from the radio no sound from the radio the radio comes on but there no sound from it

Radio is on but there is no sound.