...I took a 6 dick in dash head unit from an '06 GMC truck and put it into an '06 GMC work truck/Skaug body special...well the deck worked when I plugged it in and turned the key on, however after the truck was started it locked itself...any idea how to unlock the unit..??..also half of the volume dropped out, so when you turn the volume to 1/2 it's pretty much off..??..