2020 Chevrolet Silverado 2500HD Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2020 Chevrolet Silverado 2500HD does not support DIY on-board programming for its key fobs. This means you cannot program a new key fob yourself using a series of ignition cycles or button presses. Modern GM vehicles like your Silverado 2500HD require specialized diagnostic equipment (a scan tool) to program new key fobs and link them to your vehicle's immobilizer system. This is a security measure to prevent unauthorized key duplication and vehicle theft.

Battery replacement

1. Locate the small release button or tab on the side or bottom of your key fob.
2. Press the button or slide the tab to release the emergency key blade. Pull the key blade out.
3. With the emergency key removed, you should see a small slot or gap where the key blade was. Use a small flat-head screwdriver or a coin to carefully pry the two halves of the key fob apart.
4. Once opened, you will see the circuit board and the battery. Note the orientation of the battery (positive (+) side up or down) before removing it.
5. Carefully remove the old CR2032 battery.
6. Insert the new CR2032 battery, ensuring it's placed in the correct orientation.
7. Gently snap the two halves of the key fob back together until it’s secure.
8. Reinsert the emergency key blade.

Where to buy a replacement fob

• GM Dealership:

  • Pros: Guaranteed genuine OEM part, often comes with programming included in the price, knowledgeable technicians.
  • Cons: Most expensive option. Ballpark cost for a new fob and programming can range from $200-$400 or more, depending on the dealership and your location.

• Automotive Locksmith:

  • Pros: Often more affordable than a dealership, can provide and program both OEM and high-quality aftermarket fobs, many offer mobile services.
  • Cons: Quality of aftermarket fobs can vary; choose a reputable locksmith.
  • Cost Expectation: Generally $150-$300 for a new fob and programming.

• Online Retailers (Amazon, eBay, specialized auto parts sites):

  • Pros: Widest selection, often the cheapest option for the fob itself.
  • Cons: You're only buying the physical fob; you'll still need to pay a locksmith or dealer to cut the key (if applicable) and program it. Risk of purchasing a counterfeit or incompatible fob.
  • Cost Expectation: Fobs alone can range from $20-$100, plus programming and cutting fees (if needed) from a third party.

If on-board programming isn't supported

As mentioned, your 2020 Chevrolet Silverado 2500HD requires a scan tool for key fob programming. This means you'll need to visit a GM dealership or contact a professional automotive locksmith.

The key fobs for your Silverado 2500HD contain an immobilizer transponder chip, which is an integral part of the vehicle's security system. This chip sends a unique code to the vehicle's computer when you try to start the engine. If the code doesn't match, the engine will not start, even if you mechanically turn the ignition. Programming a new key fob involves linking this transponder chip to your vehicle's immobilizer system using specialized software and equipment. This ensures that only authorized keys can start your truck.

Cost Expectations for Professional Programming:

• Dealership: Expect to pay for both the key fob itself and a separate labor charge for programming, which can be an hourly rate (e.g., $100-$150/hour) with programming typically taking 0.5 to 1 hour. Total costs can easily exceed $300 once parts and labor are combined.
• Locksmith: Automotive locksmiths often provide a more competitive package price that includes the fob, key cutting (if essential), and programming. Their rates for programming can be lower than dealerships, making them a popular choice for replacement fobs.

Find a mobile locksmith or shop on Repairius.