2023 Chevrolet Silverado 2500HD Key Fob Programming Guide

As an ASE-certified electrical technician and locksmith, I get a lot of questions about modern GM security systems. The 2023 Chevrolet Silverado 2500HD is a heavy-duty workhorse, but its electronics are highly advanced, utilizing GM’s latest security architecture. Whether you need a spare proximity smart key or lost all your fobs on the job site, here is your comprehensive guide to programming and replacing the key fob for your 2023 Silverado 2500HD.

Quick reference

Step-by-step on-board programming

Note: For the 2023 Silverado 2500HD equipped with Push-To-Start, GM allows DIY "Add-a-Key" programming for U.S. vehicles only if you already have two recognized, working key fobs. Canadian vehicles, or vehicles where all keys are lost, generally require a dealer or locksmith scan tool due to the new Global B/VIP electrical architecture.

If you have two working fobs and want to add a third, follow these steps:

1. Access the Backup Pocket: Open the center console storage bin. Remove the rubber mat at the bottom to expose the key fob transmitter pocket.
2. Prepare the Keys: Place your two currently recognized fobs in the cupholders.
3. Insert the New Key: Insert the unprogrammed new fob into the center console transmitter pocket. Ensure the buttons are facing up.
4. Initiate Programming Mode: Remove the physical emergency key blade from one of your working fobs. Insert this blade into the driver’s outside door lock cylinder. Turn the key to the Unlock position five (5) times within 10 seconds.
5. Watch the DIC: The Driver Information Center (dashboard screen) will display “Ready for Remote #3” (or 4, 5, etc.).
6. Program the Fob: Press the ENGINE START/STOP button once. The DIC will display “Ready for Remote #4”, indicating the fob in the pocket has been successfully learned.
7. Exit Programming: Remove the newly programmed fob from the pocket. Press the UNLOCK button on the new fob.
8. Test the Fob: Turn the vehicle off. Step outside with only the new fob and test the lock, unlock, and remote start functions to verify successful programming.

Battery replacement

A weak battery is the number one cause of intermittent remote start or proximity lock failure. The 2023 Silverado 2500HD fob uses a standard CR2032 3V lithium battery.

1. Press the small silver release button on the side of the fob and pull out the emergency key blade.
2. Look inside the slot where the key blade was resting. Insert a flathead screwdriver or a trim-pry tool into the gap and gently twist to split the two halves of the fob shell.
3. Carefully pull the back cover off.
4. Remove the old CR2032 battery.
5. Insert the new CR2032 battery with the positive (+) side facing down toward the back cover.
6. Snap the two halves of the fob shell back together securely.

Where to buy a replacement fob

When sourcing a replacement, you have three primary routes:

• The Dealership: Guaranteed OEM quality (PN: 13537962 or 13537964). Pros: Perfect compatibility. Cons: Highly expensive, often charging $150-$250 for the part alone, plus another $150 for programming.
• Automotive Locksmith: A great middle-ground. Locksmiths carry OEM or high-quality aftermarket fobs (like Keyless2Go). Pros: They come to you, can laser-cut the HU100 emergency blade on-site, and often charge 20-40% less than the dealership.
• Amazon / Online Retailers: The cheapest route ($30-$60 for the fob). Pros: Very affordable. Cons: High risk of buying a locked, used, or cheap knock-off fob that will fail to program.

If on-board programming isn't supported

If you have lost all your keys, or your specific trim/region restricts the manual "door-lock cylinder" method, on-board programming will not work.

The 2022-2023+ Silverado models utilize GM’s Global B (VIP) electrical architecture. This system features highly encrypted immobilizer transponders. Programming a key from scratch requires an advanced diagnostic tool equipped with CAN FD protocols and an active subscription to GM's Service Programming System (SPS2).

Expect to pay an automotive locksmith or dealer between $250 and $400 for a complete "All Keys Lost" service, which includes the fob, the laser-cut emergency blade, and the secure module programming required to sync the new immobilizer transponder to the Body Control Module (BCM).

Find a mobile locksmith or shop on Repairius.