Huming Noise In My Back Speakers

[ktmblue]

i have a 2008 gmc sierra with bose sound. i put a 2007 gm navigation in it. the navigation that i put in it can out of a 2007 chevy tahoe with bose sound and rear dvd. my gmc does not have rear dvd but does have rear intertamint. after i had the nav unlock by my dealer it powers on and work fine but it has a humming sound that comes out of the rear speakers i does go away when you turn on the rear intertamint but by doing that it turns off the rear speakers. has any one had the problem if so how did you resove it thanks Kalen

[emwolb469]

Humming noises from speakers are usually from a loose ground wire.