CHEVROLET SILVERADO BATTERY

I Have A Sivlerado With An After-market, Competition Level Stereo System. I Have A High-output Amplifier, Powering 3 Amps, 3 Capacitors...

I Have Notice That My Battery Will Go Dead After Three Or Four Days Of Sitting Around. The Battery Has Be Tested And Is Good. I Have Not...

If The Truck Is Not Started Everyday The Battery Drains. I Tested Everything Even Pulled The Fuses Out, But Nothing Is Helping.

I'm Trying To Find Out Some Info On My Headlight Switch Before Replacing The Battery Or Digging Into The Starter Or Alternator. Five...