Average GPS coordinates for San Luis Postcode location: 19.202, -103.669. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Luis on map:

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Listing cities & postcodes (3):
>> Chihuahua, 31885 San Luis, Buenaventura, GPS coordinates: 19.1478,-103.7952
>> Chihuahua, 32886 San Luis, Ojinaga, GPS coordinates: 19.2917,-103.6792
>> Chihuahua, 33984 San Luis, Jimenez, GPS coordinates: 19.1667,-103.5333