Hi,
My name is Sly Luna. I drive an 08' Silverado. About a year ago I replaced my factory radio with a factory navigation radio. after it was installed the door chimes and turn signal chime were very hard to hear. The turn by turn voice prompt on the nav would not sound, and the steering wheel volume control changed from turning up the volume very quickly to having to hold it down longer to get to the same volume. I know that on the factory radio you hold down the 6 button while the radio is off, but since there is not a hard 6 on the nav this is not possible. If anybody knows how I can fix this please post.