I just put in a new head unit from a 2000 t/a monsoon system, and I have a delco cd changer from a '97 camaro. I picked up the head unit because the head unit in my '95 would not control the changer (even though it had the plug for the changer...go figure.)

Now I can control my cd changer, however the only thing I hear is the cd changer browse through the trays to see if there's a disc or not in each one, then when I go to use it I don't hear anything and I get an error message of E30...what does that mean?