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go to the dealer ( Cadillac or subsidiary) near you and take your VIN number they will find out the code to unlock your stereo, it is caused because the batery was diconected or discharged, the memory of the stereo keeps watching for the vin number stored in memory but if you loose it you need a code, this kind of stereos only work on Cadillac, do not try to install it on a Nissan it won work, or any other car that is not the original. ha ha ha ha reddragon.

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13y ago

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