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Q: Some one stole my spare key out of my truck

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Some one stole my spare key. Is there any way to reprogram a new set of keys to my truck so that the person who stole the spare can't get into my truck .. Please help

My car has 160000 miles.
My car has an automatic transmission.

You cannot reprogram the lock cylinders to not fit the stolen key and still work for your key. You will need to replace all the lock cylinders and get new keys. You will have to program the new keys and computer to work in your vehicle. The reprogramming would need to be done at a dealer or authorized reprogramming locksmith.

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