amyone out there can help please let me know i purchased a navigation radio off ebay and installed it into my truck and i thought everything was going to work cause it came on and played but sound is not right and also the door chime is extremely loud and the blinker sound is different and also very loud and you cant adjust or program it i took it to the chevrolet place and they charged me $34 to tell me it would not program they did not know what was wrong anyone had this problem or know if there is a fix for this