Rev. Sherry McGuffin » Directory To submit changes or updates to information in the directory, please contact Ann at the Synod Office. Go back to directory. Add to Address Book. Rev. Sherry McGuffin Cross of Christ Lutheran Church/Petoskey Work 1450 East Mitchell Road Petoskey MI 49770 work Home Phone: 231-881-1212home Work Email: email@example.comINTERNET Categories: Uncategorized Updated 3 years ago.