JackCreeper

I have a 2008 GMC Sierra 1500 Denali. I replaced the driver side mirror because the power folding part stopped working. I have the reverse tilt on in vehicle, when I put it in reverse the driver side mirror tilts down and all the way to the left and you can still hear the motor until you push the switch. While still in reverse, I manually move mirror to desire location and take the truck out of reverse. The mirror does not go back to the last position it was in in normal driving mode. When manually adjusting it, I put back in reverse then mirror goes down and to the far left again. Thoughts .