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Switching out CTS RADIO FOR NAV uNIT

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Hello all-if I posted this earlier I apologize-I need some advice-Here is the problem.I swapped my 2006 CTS radio and put in a 2007 Navigation Unit into the 2006 CTS-This was a GMC Nav unit from another vehicle-it was installed by sound on wheels-Cadillac then re-programmed the Unit to read the CTS 2006 VIN Number-

Everything works except the unit only reads the Map as being in California and will not read anything else.I have purchased an updated DVD for the CTS-STILL THE SAME PROBLEM.I went on the Internet and found how the unit could be reset to factory Specs-still the same problem.Any ideas? I appreciate any help I can get.Thank you all


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