Check the ground to your amp. Make sure it is grounded close to the amp and that all the paint is gone down to bare metal. Run another ground from the ground of the battery to the frame of the truck, making sure it is to bare metal and using at least 4ga wire.

 

The main ground is a 1/0 cable straight to the frame. Since there are 3 amps in the truck, it goes to a distribution block before the amps. I haven't done the battery ground yet, but it is in the works for the weekend.

I did get 99% of the noise out after removing all of the Monster Cable Microxln series cables and replaced them with Walmart cheapies.. Monster is going to warranty them for me, as I know one has a broken wire inside it.