GM Nav help

I just replaced my 6 disc Bose system in my 2006 Trailblazer with a GM Nav NON-LUX unit P/N 15800000.  It had the VIN cleared before I purchased it.  Everything works great, except the chime is too loud.  Much louder than with the original radio.  I set the chime to "Normal" in the config screen, but it's still too load.  A local dealer told me that I can't upgrade the factory radio and there is nothing they can do for me except put the original radio back in.
   Everything I've read says the swap is plug-n-play.  Can anyone suggest a solution?  Any help would be greatly appreciated. 
 

Private message zx1100f1.  He has a vast amount of knowledge of GM products.  If he cant help you , noboby can - though I am sure he can get you your question answered.

Engine2,
 
Thanks, ZX1100F1 was very helpful. 

quote:

ORIGINAL: krcarleton

Engine2,

Thanks, ZX1100F1 was very helpful. 

Your welcome.  Glad he could help you. 

I am amazed how well ZX know's GM products.  He is a huge asset to have on this forum.

Could you share the solution?  I have the same problem with my GM Nav NON-LUX unit P/N 15800000.  Any help would be appreciated.