Issue with truck locking

I have a 2018 Chevy Silverado 1500, and this started today. When I go to lock my truck with my key fob, it does not lock and all of my windows roll down. When I have my truck running and in park, my doors make the sound of wanting to lock but never do. I even replaced the battery in my key fob and still have the same problem.

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It is the circuitry in your key fob. Basically the buttons are sticking together

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How much does a replacement key fob cost, and does it have to be particular to Chevy?

They are relatively inexpensive, costing $20 each on eBay and Amazon. Yes, you have to go to the dealership to have them programmed, which normally costs $40. However, Amazon sells a key fob with a programmer for $60.