Birch Run and Saginaw PD and FD (and everything else in Saginaw Co) are on the
MPSCS (remember to put in the MMR TG's for countywide EMS too) which your scanner can decode, but Auburn Hills PD and FD (Oakland Co) is on an
Open Sky system, which no scanner ever made can decode. However there's a few agencies in Oakland Co that are on the MPSCS, the most active ones being MSP Metro North and Community EMS, which both serve the whole county.