Average GPS coordinates for Macomb Postcode location: 42.659, -82.907. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Macomb on map:

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Listing cities & postcodes (2):
>> Michigan, 48042 Macomb, Macomb, GPS coordinates: 42.6735,-82.9163
>> Michigan, 48044 Macomb, Macomb, GPS coordinates: 42.6442,-82.8985