You didn't say what online decoder you tried - there are dozens of them and not all include truck & motorhome chassis info. Some '04 Allegros used a Ford chassis, but the 37DB was exclusively Workhorse so the Workhorse decoder that CJ7365 provided should work fine.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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