Well the volume on my gps stinks.....Tried the FM trans but that really sucks I'm going to try running AUX from headphone jack to Aux plug Will this work? Can you give me the size of plug I must buy at local RS.....Are both ends same size???

 

Well I'll answer my own question bought the audio cable from RS and it works like a charm....My GPS now plays in my aux plug......GPS in stereo.....But you must have head-phone jack on GPS.....