Static Noise coming thru speakers

[TnTahoe]

I just installed a Pioneer AVH P4200DVD and I noticed that while switching between sources I can hear this static noise (kinda like when you turn your radio to a station with no reception) and the noise increases with volume and I get this noise with the vehicle on or off. I also get some type of noise going to my subs during the same time. I unhooked the rcas from the unit and the noise is still there, I even tried to reground the unit. If anyone can help please chime in.