2016 GMC Sierra 2500HD Key Fob Programming Guide

Quick Reference

Step-by-Step On-Board Programming

The 2016 GMC Sierra 2500HD does not support DIY on-board programming for key fobs. This vehicle requires a specialized scan tool to program new or replacement key fobs. This is because modern vehicles like your Sierra often incorporate advanced security systems that link the key fob directly to the vehicle's immobilizer system, which can only be updated through a dealership-level diagnostic tool or an equivalent aftermarket programming device used by a professional locksmith.

Battery Replacement

1. Locate the small release button or notch on the side or bottom of your key fob. This is usually where the emergency key blade is stored if your fob has one.
2. Press the release button and slide out the emergency key blade (if applicable). This will often reveal a small slot or seam in the fob casing.
3. Carefully use a small, flat-head screwdriver or a coin to pry apart the two halves of the key fob casing. Work your way around the seam gently to avoid damaging the plastic.
4. Once the case is open, you will see the circuit board and the battery. Note the orientation of the battery (which side is positive facing up).
5. Using a non-metallic tool (like a plastic pry tool or your fingernail), gently pop out the old CR2032 coin cell battery.
6. Insert the new CR2032 battery, ensuring the positive (+) side is facing in the same direction as the old battery.
7. Align the two halves of the key fob casing and firmly press them back together until they click securely into place.
8. Test the new battery by attempting to lock and unlock your truck.

Where to Buy a Replacement Fob

When it comes to replacing your 2016 GMC Sierra 2500HD key fob, you have a few options, each with its own pros and cons:

• GM Dealership:

  • Pros: Guaranteed genuine OEM part, expert programming, and support. They have the specific tools and software for your vehicle.
  • Cons: Most expensive option. Expect to pay anywhere from $200 to $400 or more for the fob and programming.

• Professional Locksmith:

  • Pros: Often significantly cheaper than a dealership, especially a mobile locksmith who can come to you. They use professional-grade scan tools capable of programming most vehicle fobs, including those for the Sierra 2500HD. They can also cut new key blades on the spot if needed.
  • Cons: Ensure the locksmith is reputable and experienced with your specific vehicle. Prices can range from $150 to $300, including the fob and programming.

• Online Retailers (Amazon, eBay, etc.):

  • Pros: Potentially the cheapest way to purchase just the fob itself. You can find OEM or good quality aftermarket options.
  • Cons: You still need to pay for programming separately, either from a locksmith or a dealership. There's also a risk of purchasing a counterfeit or incompatible fob if you're not careful. Be sure to match the FCC ID and part numbers precisely. A standalone fob might cost $30 to $100, but remember to factor in programming costs.

If On-Board Programming Isn't Supported

As established, your 2016 GMC Sierra 2500HD falls into the category of vehicles that require professional assistance for key fob programming due to its advanced immobilizer and security system. The key fob contains a transponder chip that communicates with the truck's immobilizer system, allowing the vehicle to start. This system also needs to be programmed to recognize any new keys or fobs.

Cost Expectations: As mentioned above, expect to pay for both the key fob and the programming service. If you purchase an aftermarket fob online, you'll then need to budget for the locksmith or dealership's programming fee, which can be $75 to $150 or more on top of the fob cost. When getting a quote, always ask for an all-inclusive price that covers the fob, key cutting (if applicable), and programming.

Immobilizer Transponder: The key blade of your intelligent key (if it has one) will also contain a transponder chip. Even if you get a new fob programmed, the actual physical key blade portion (if separate from the fob in some GM models, or the emergency key) might need to be cut to match your locks. For fobs with integrated key blades, the blade will need to be cut to match your vehicle's ignition and door cylinders by either a locksmith or dealership.

Find a mobile locksmith or shop on Repairius.