I have a 2004 Trailblazer LT with power mirrors. Sometimes when I unlock the doors with the remote it decides to change the mirror position, it happens more with the drivers side but sometimes with the passenger side. I have both the memory presets set in the same position and it will do it with either remote. Is the memory position stored in the mirror or is it in the BCM, Both mirrors are aftermarket so I'm assuming it's a mirror problem would just like to make sure before I replace the mirrors with GM parts. It has the turn signal indicators in them if that makes a difference. Thanks in advance for any help.