Just installed the new HU yesterday and everything seems to be functional for the most part , but thats another story. Except for some reason i am unable to change the source icons on the home screen.  There is a video from pioneer showing a man drag, for example, the SiriusXM icon up into the bar to replace a seldom used one... but I am unable to drag any of them... is there a setting im missing somewhere?

Hit the home button, click av button. Hold and drag the Sirius icon from the selection to the shortcut section, done

hmmm yea thats what i was attempting... doesn't seem to drag at all.  Could there be a difference between the 4000 and the AVIC units?

Hit the home button, click av button. Hold and drag the Sirius icon from the selection to the shortcut section, done

that is how my 4000 works.

Either your hand brake isn't engaged or your hand brake wire is faulty/disconnected.

OK, Finally had the time to take care of this, it was indeed the fact that I had left the HB wire disconnected.  Spending the extra time to get the entire center console out didn't really appeal to me so I got a bypass and it worked perfectly. But now I have another problem...  Everything is installed and working great. Now i need the serial number off the unit and I don't want to open up the dash again if i don't have to. 

Does anyone know an additional way to get the serial # ?  I looked but didnt seem to find any info screens containing it.

Look on the box the HU came in. It's by the barcode. Small, but it's there

There was a piece of paper in the bundle with the manuals for my 8000 that had the serial number. You may have one of those as well.