Replacement key programming instructions needed

1999 BUICK PARK AVENUE
150,000 MILES • AUTOMATIC
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PMCGRAW
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How to program a replacement master key?
Nov 25, 2020 at 1:52 PM
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KASEKENNY
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I am attaching the process for the PASS key and the process for an additional key.

Let us know if you need other info. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed. Thanks
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Nov 25, 2020 at 2:09 PM