I have a 2005 avalanche, I put in an aftermarket pioneer double din, but for some reason I can't turn off the auto volume… The first stereo I put in was working fine for a couple months, then all of a sudden one day the auto volume kicked in… I thought it was the stereo malfunctioning, so I bought a new one but the auto volume continues to stay on… The pioneer double din I bought does not have the auto volume option, so I reinstalled the stock stereo and turn it off that way. It worked on the stock stereo, but when I reinstalled the aftermarket pioneer it didn't turn off the auto volume… any suggestions?