You might have missed it, but the second response after your question was from Viziondetroit:
the location of the Ed Davis dealership is at Sexter and Elmhurst. It is owned by the State of Michigan and is a community center. I worked there in 2002 and even though they made some mods on the inside, you can still tell what was there and so forth like the service dept, show room etc. The lots are still outside where the cars used to sit. The building is in very good condition and serves the community well.
He spelled Dexter incorrectly, but it was at the southwest cornr of Dexter and Elmhurst. Then just beyond halfway down the first page, I posted a scan of his Yellow Pages ad, after Ryanal and Dick Green.