C6 Navigation System Theft Lock

I have a 2006 Corvette Coupe with the factory navigation system.  I am wanting to take it out of my Corvette and put it in a 2006 Chevy Silverado.  I had it in the Silverado playing and a theftlock feature of the nav system came on and locked the system down. I understand the theftlock system reads the vin information of the orignal vehicle it is installed in as when I put it back in the Corvette it started working again.  My question is can the theftlock feature be disabled while it is still in the Corvette so that when I put it in the Silverado, it wont lock up?  Please email me at sixsigma@earthlink.net if you have any solutions.  The dealers in my area have no clue what to do with it.

check this out:
 
http://forums.corvetteforum.com/showthread.php?t=1204336
 
I started reading and got bored so am unsure if they got to the bottom of it.