I have been told that the records may have been passed on to whomever bought the funeral home, taken with the owner or destroyed. In rare cases they may have been donated to some place like the Burton Historical collection of the main Detroit Public Library, the Bentley Historical Museum in Ann Arbor MI or a local historical society.
According to the 1928-29 City directory the address was 2232 Gratiot. Streets were re-numbered ca 1920. Using google maps, it doesn't appear that there is funeral home there now.