How To Re-program Key Fob For Different Vehicle

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steve45

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I just bought a 2016 Tahoe. The used car dealer that I got it from only had one key for it, but gave me a second key from a 2015 Tahoe. They said that I could re-program it to work with my vehicle, but they didn't know how to do it. (Of course the emergency key would have to be changed).

I looked in the internet and found instructions for programming a NEW key fob, but multiple attempts did not work. I tried a new battery in the fob, as well. I put the fob in the slot in the console and got the message that the fob was not found. I saw one article that gave a specific circuit board number for a fob that would work on the 2016 model, but my working fob didn't have that number.

I finally bought a new key from a local locksmith (my neighbor), he programmed it, and it works fine. He commented that when trying to switch a fob from one vehicle to another, it was rather hit or miss. Sometimes it works. sometimes it doesn't.

Any thoughts?

On another related note, I would like to be able to carry a spare key & fob on the vehicle. I was thinking that you could hide it in a weatherproof container and remove the battery and store it outside the fob so you could lock the doors. Has anyone done anything like this?
 

wjburken

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Starting in 2011, if I recall correctly, you are not able to program a key or FOB at home. It requires a dealer or a locksmith. I believe it can also be done by someone with a TECH 2, but I am not certain.

The other thing is to make sure the FOB has the proper frequency for your vehicle. I would imagine that they didn’t change between 2015 and 2016, but again, I can’t guarantee it.
 
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steve45

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The locksmith didn't use any special tools or anything, he just used the working fob, went through the steps with the emergency key, put the fob in the console, and it worked.

One other thing, I asked him if his catalog showed a different part number for 2015 & 2016 and he said they were the same.

Thanks for responding!
 

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