Passenger side mirror must constantly be adjusted.Is fine with truck running,after shutoff,the mirror points down and must be re-adjusted

There is a feature on the topend models called something like "Park Assist". It is suppose to tilt the mirror down when you put the vehicle into reverse so the outside mirror will show the curb. This is suppose to help in parallel parking.

The control for this feature is on the Electronic menu. This menu also has the Auto doorlocks, Alarm Chirp, and a few other gadgets. Since the Mirror control is obviously out of control you may try to turn this feature OFF. The Owners manual should show you how. I know that one of the buttons advances the Menu and another changes the setting.

If the Mirror changes settings with the door slamming, then its a problem with the cable running through the doorjam.