Hi,
2001 Silverado, bought JVC hd and installed by others hoping the best, now I have all nose and very bad sound, open my dash found a big mess connections, shopped wires and very bad quality work.. Do it your self is the best, I have JVC HD , DVD and AMP 4 channels, 4 speakers and one subwoofer. Please, I need any wiring diagram or any hint to clear this mess.
Note: RCA connectors R and L and subwoofer output available on rear. No Aux output available at this model.

Please help. .

Thanks