lost warning chimes

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I have an 06 1500 crew that i have recently put an alpine dvd, navigation head unit in, (professional install) the problem that i have is that i no longer have any warning chimes, door open, low fuel, buckle seat belts, etc. Sounds funny im sure that I would be wanting those noises, but no matter how anoying or whatever i prefer my vehicles to be in 100% working order. I have talked to the installer about the problem and they have replaced the interface module, and still cant figure out what is causing the issue. From what i have read on here the guys that are on here KNOW what they are talking about. Thanks in advance for anyone that may have an idea where to start!!!!