Passenger outside mirror

[Nolesser Man]

2017 GMC 2500 Denali diesel.  While driving, the upper portion of the outside passenger mirror moves from the set position and points to the sky.  It has been. to the dealer several times, but they have not found an error code.  I picked the vehicle up Friday after they found no error code.  The mirror was pointed up.    If I did not commit to helping someone on Saturday,  I would have left with the dealer.    Sunday, my wife used vehicle and mirror returned to normal position.  The dealer wants to disconnect the mirror.  I paid extra for electrical component insurance.  My wife and I are over a foot apart in height.  Disconnecting the unit is not an option. Has anyone had a similar occurrence or know of a solution?