2018 Chevrolet Silverado 2500HD — Key Fob Programming

Quick reference

Step-by-step on-board programming

Good news: the 2018 Chevrolet Silverado 2500HD features a user-friendly, on-board programming procedure that doesn't require special tools. You can add a new fob in just a few minutes using only your existing, working key.

Note: This procedure is for adding new remotes. You must have at least one recognized (working) key to start. If you have lost all your keys, you will need to contact a locksmith or the dealer. This procedure will program both the remote functions and the immobilizer transponder chip for the new key.

1. Insert your original, working key into the ignition.
2. Turn the key to the ON position (do not start the engine) and then immediately back to the OFF position.
3. Remove the original key.
4. Within 5 seconds, insert the new key you wish to program into the ignition.
5. Turn the new key to the ON position. The Driver Information Center (DIC) on your dashboard should display a message like "Adding Key" or "Ready for Remote #X".
6. Wait for a confirmation chime, which typically occurs within 10-15 seconds. The DIC will indicate that the key is now programmed.
7. To program additional keys, repeat steps 3-6. You can typically program up to 8 keys to a single vehicle.
8. When you are finished, turn the key to the OFF position to exit the programming mode. Test all buttons (lock, unlock, remote start) and try starting the vehicle with the new key to confirm that the immobilizer chip was programmed correctly.

Battery replacement

Replacing the battery in your fob is simple.

1. Look for a small slot or seam on the side or bottom of the fob case.
2. Use a small flathead screwdriver or pry tool to gently separate the two halves of the fob.
3. The fob uses a single CR2032 battery. Note the orientation (+ or - side up) of the old battery before removing it.
4. Slide the new battery into place, ensuring it's oriented correctly.
5. Snap the two halves of the fob back together. You shouldn't need to reprogram the fob after a battery change.

Where to buy a replacement fob

• Dealer: The most expensive option, often running $150–$250+ for the fob and another $50–$100 for programming, even though you can do it yourself. This is your most reliable, albeit priciest, source.
• Automotive Locksmith: A locksmith can sell you an OEM or high-quality aftermarket fob and cut the integrated key blade. They will be cheaper than the dealer, often in the $100–$200 range, all-in. They can also assist if you lose all your keys.
• Amazon/eBay: You can find many affordable aftermarket fobs online, some as low as $25–$50 for a two-pack. However, quality can be a gamble. Read reviews carefully. You will still need to get the key blade cut by a locksmith, which typically costs $25–$50.

If on-board programming isn't supported

While the 2018 Silverado does support on-board programming, it's important to know the distinction for other vehicles. Many modern vehicles require a professional diagnostic scan tool to access the vehicle's computer to program new keys. This is especially true for vehicles with push-to-start ignitions or more complex security systems. The tool communicates with the immobilizer system to authorize the new transponder chip inside the key. This is a security measure to prevent unauthorized key duplication. If this were the case, your only options would be a trip to the dealer or a call to a qualified automotive locksmith, with costs generally ranging from $150 to $400 depending on the vehicle and labor rates.

Find a mobile locksmith or shop on Repairius.