2018 Chevrolet Silverado 3500HD Key Fob Programming

Quick reference

Step-by-step on-board programming

The 2018 Chevrolet Silverado 3500HD supports on-board programming for the Remote Keyless Entry (RKE) portion of your key fob. This allows you to add new or replacement fobs without needing special dealer tools. However, it's important to note that this procedure only programs the remote functions (lock, unlock, panic, etc.). If your fob also contains a transponder chip for starting the vehicle, that portion will still need to be programmed by a locksmith or dealer.

Before you begin:

• Ensure all existing fobs you wish to keep are present, as this procedure will erase all previously programmed fobs.
• Close all doors.

1. Insert the working key into the ignition.
2. Turn the ignition to the "ON" position (without starting the engine) and then back to "OFF" within 5 seconds. Repeat this sequence two more times, ending in the "ON" position on the final cycle.
3. The Driver Information Center (DIC) should display "REMOTE LEARN PENDING" or a similar message.
4. Press and hold the "LOCK" and "UNLOCK" buttons on the new (or existing) key fob simultaneously for approximately 15 seconds. The DIC should confirm that the remote has been learned.
5. Repeat step 4 for any additional key fobs you wish to program, including your existing ones.
6. Turn the ignition to the "OFF" position to exit programming mode. Test all key fobs to ensure they function correctly.

Battery replacement

When your key fob starts to lose range or stops working, the battery is usually the first culprit. Your 2018 Chevrolet Silverado 3500HD key fob uses a common CR2032 coin cell battery.

1. Locate the seam on the edge of the key fob casing.
2. Carefully pry open the case using a small flat-head screwdriver or a coin. Be gentle to avoid damaging the internal components.
3. Remove the old CR2032 battery. Note the orientation (+/- sides).
4. Insert the new CR2032 battery with the positive (+) side facing up.
5. Snap the key fob casing back together securely.

Where to buy a replacement fob

Choosing where to purchase a replacement key fob depends on your budget, urgency, and technical comfort level.

• Dealership: This is the most expensive option, often costing $200-$350 or more for the fob and programming. However, you are guaranteed an OEM part and professional service. If your vehicle requires transponder programming, they can handle it all.
• Locksmith: A mobile locksmith or a local automotive locksmith shop can often provide and program a new key fob for significantly less than a dealership, typically in the range of $150-$250. They often have access to both OEM and high-quality aftermarket fobs and have the necessary tools for transponder programming if needed.
• Amazon/Online Retailers: You can find aftermarket fobs for as little as $20-$60 online. While this is the cheapest option upfront, be cautious. Ensure the FCC ID and part numbers match your original fob exactly. Remember that these are often "shell" fobs or fobs that only support RKE. If your key has an immobilizer for starting the engine, you'll still need to pay a locksmith or dealer to cut the key blade and program the transponder chip, adding to the overall cost.

If on-board programming isn't supported

While the RKE functions of your 2018 Chevrolet Silverado 3500HD key fob can be programmed using the on-board method, the transponder chip required to start the vehicle cannot. This is an anti-theft measure. If you are getting a brand new key and need the vehicle to recognize the key for starting, you will need professional assistance.

An ASE-certified locksmith or dealership will have specialized diagnostic equipment (scan tool) to access your vehicle's immobilizer system and program the new transponder chip. The transponder chip in your vehicle's key fob sends a unique code to the vehicle's computer. If the code doesn't match, the vehicle won't start, even if the key blade turns in the ignition. Expect to pay for both the key cutting (if applicable) and the transponder programming, which can range from $75 to $150 on top of the key fob cost.

Find a mobile locksmith or shop on Repairius.