i bought this
http://www.beachaudio.com/Scosche/Gm...tm_content=atr its new. my issue is this when i open door after car is off the radio turns off, now when i turn the car on it is on bought when i crank it over start the car the radio turns off. some times it works and sometimes not, should i return it as malfunctioned unit or did i do something Wrong, or need to replace something?