2019 Chevrolet Suburban Key Fob Programming Guide

As an ASE-certified electrical technician and professional locksmith, I see a lot of modern GM vehicles come through the shop. The 2019 Chevrolet Suburban is an incredibly popular full-size SUV, and losing a key for it can cause a major headache. Fortunately, GM built in a relatively straightforward DIY method for adding a new push-to-start smart key, provided you already have at least one working key.

Here is your comprehensive guide to buying, programming, and maintaining the key fob for your 2019 Chevrolet Suburban.

Quick reference

Step-by-step on-board programming

Note: This procedure is for U.S. domestic market vehicles equipped with Push-to-Start. Canadian vehicles typically require two working keys or professional scan tool programming due to different immobilizer regulations. You must have one recognized, working smart key to perform this DIY "Add-a-Key" procedure.

1. Have both keys ready: Bring your recognized (working) key fob and the new, unprogrammed key fob into the vehicle.
2. Access the lock cylinder: Remove the plastic cap on the rear edge of the driver’s outside door handle to expose the physical key lock cylinder.
3. Trigger programming mode: Insert the physical emergency key blade (from your working fob) into the driver's door lock cylinder. Turn the key to the "Unlock" position five (5) times within 10 seconds.
4. Check the dashboard: The Driver Information Center (DIC) on the gauge cluster will display "Ready for Remote #2" (or #3, #4, depending on how many keys are already programmed).
5. Place the new fob in the programming pocket: Open the center console storage bin. Remove the rubber mat at the bottom. You will see a small, key-shaped pocket or indentation. Place the new, unprogrammed key fob into this pocket with the buttons facing up.
6. Program the remote: Press the ENGINE START/STOP button once. When the fob is learned, the DIC will update to say "Ready for Remote #3" (or the next sequential number).
7. Complete the process: Remove the newly programmed fob from the pocket. Press the ENGINE START/STOP button and hold it for 12 seconds to exit programming mode.
8. Test the key: Step out of the vehicle and test the lock, unlock, remote start, and power tailgate buttons. Ensure the vehicle starts when the fob is in your pocket.

Battery replacement

If your Suburban is displaying a "Key Battery Low" message on the dash, or the remote range has significantly decreased, you likely just need a new CR2032 battery.

1. Press the small chrome button on the side or bottom of the smart key to release the emergency key blade.
2. Pull the emergency key blade out.
3. Look inside the slot where the key blade was resting. You will see a small pry point. Use a flathead screwdriver or the tip of the key blade to gently twist and split the two halves of the fob apart.
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 key fob back together firmly and reinsert the emergency blade.

Where to buy a replacement fob

When sourcing a replacement smart key for your 2019 Suburban, you have three primary options:

• The Dealership: The safest but most expensive route. An OEM fob from the dealer will usually cost between $150 and $250, and they will charge another $100–$150 to cut the blade and program it.
• Automotive Locksmith: A professional locksmith can provide an OEM or high-quality aftermarket fob. They will laser cut the emergency blade on-site and handle the programming. Expect to pay around $150–$200 total for a push-to-start fob and service.
• Amazon / Online Retailers: The cheapest DIY route. You can buy an aftermarket fob for $20 to $50 online. Pros: Very affordable. Cons: Quality is hit-or-miss, some aftermarket fobs fail prematurely, and you will still need to pay a locksmith to laser-cut the emergency blade (usually $30–$50).

If on-board programming isn't supported

If you have lost all your working keys, the DIY on-board programming method will not work. In an "All Keys Lost" situation, the vehicle's immobilizer system (which uses an ID47 transponder chip integrated into the smart key board) locks out the on-board adding process to prevent theft.

To generate a new key from scratch, an ASE-certified technician or automotive locksmith must connect an advanced bi-directional OBD2 scan tool to the vehicle to clear the immobilizer's memory and force-pair a new set of keys. This process requires a 10-to-12 minute security wait time built into GM's software. If you find yourself in this situation, expect the cost to range from $250 to $400 depending on your location and whether you require emergency mobile service.

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