What is wrong with the ignition of my car if the key won't go in the ignition? on 2004 Cadillac DeVille DTS

A foreign key was put into the ignition by mistake, now the right key won't key won't go in.

by in O'Fallon, MO on November 12, 2012
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2 answers
ANSWER by , November 12, 2012
maybe tumbler
ANSWER by , November 13, 2012
sounds like the lock pins inside are gamaged call a mobile locksmith in your area to repair