Canker (a symptom of disease) is present on the trunk.  We don't know what pathogen caused it, but fire blight is likely.  Compare here:

https://images.app.goo.gl/7A5G1RbyG5mn1Chu7

The only way to know for sure is to send samples of the affected area to the Minnesota Plant Disease Clinic.

Although twig and branch cankers can often be removed, trees with trunk cankers are usually lost.

Learn more here:

https://extension.psu.edu/apple-and-pear-disease-fire-blight-dormant-removal-of-cankers

I you decide to send samples to the Plant Disease Clinic, go here to learn how to do that:

https://pdc.umn.edu/