2014 GMC Sierra 1500 Key Fob Programming Guide

As an ASE-certified electrical technician and automotive locksmith, I frequently get questions from truck owners about adding or replacing key fobs. If you drive a 2014 GMC Sierra 1500, replacing a lost or broken key fob is a bit different than older GM models. In 2014, General Motors transitioned to a newer Body Control Module (BCM) and immobilizer system for their full-size trucks, which changed how new remotes and transponder keys are paired to the vehicle.

Below is your comprehensive guide to the 2014 GMC Sierra 1500 key fob, including part numbers, battery replacement, and programming expectations.

Quick reference

Step-by-step on-board programming

Unlike older GM trucks (2007-2013) that allowed you to program a new key fob through the Driver Information Center (DIC) using a simple sequence of button presses, the 2014 GMC Sierra 1500 does not support on-board DIY key fob programming.

To program a new fob or transponder key to this truck, the vehicle's BCM must be placed into learn mode via the OBD2 port. This requires:

1. A professional automotive scan tool with bi-directional key programming capabilities (e.g., Autel, Snap-on, or GM's GDS2 software).
2. Or a single-use DIY OBD2 programming dongle (often sold by companies like Dorman alongside their aftermarket fobs).

If you purchase a Dorman kit with the included OBD2 programmer, the general DIY steps are:

1. Have all keys ready: Gather all existing working keys/fobs and the new unprogrammed ones.
2. Turn on the ignition: Insert a previously cut, working key into the ignition and turn it to the ON/RUN position (do not start the engine).
3. Plug in the programmer: Insert the OBD2 programmer into the diagnostic port under the driver's side dashboard. Wait for the programmer to beep.
4. Program the remotes: Follow the specific beep sequences outlined in the included manual. Usually, this involves pressing the LOCK and UNLOCK buttons simultaneously on the new fob until the truck's door locks cycle.
5. Exit programming mode: Unplug the module and test all fobs.

Note: The key blade itself (HU100) must be physically laser-cut by a locksmith or dealer before it can turn the ignition.

Battery replacement

If your 2014 Sierra's fob is acting up, has poor range, or displays a "Replace Battery In Remote Key" message on the dashboard, a simple battery swap will usually fix it.

1. Locate the slot: Look at the side or bottom seam of the key fob where the two plastic halves meet.
2. Pry open the case: Insert a small flathead screwdriver or a coin into the seam and gently twist to separate the front and back halves.
3. Remove the old battery: Carefully slide out the old CR2032 battery. Take note of its orientation (usually the positive "+" side faces down toward the back cover).
4. Install the new battery: Insert a fresh CR2032 battery in the same orientation.
5. Reassemble: Snap the two plastic halves back together firmly until the seam is flush all the way around. Test the buttons.

Where to buy a replacement fob

When shopping for a replacement key fob, you have three main avenues, each with its own pros and cons:

• The Dealership: Buying directly from a GM dealership guarantees you are getting a genuine OEM part (like PN 13577770). Pros: Guaranteed compatibility, high quality, warranty. Cons: Very expensive. Expect to pay $150–$250 for the fob and another $100–$150 for cutting and programming.
• An Automotive Locksmith: A mobile locksmith can supply either OEM or high-quality aftermarket keys. Pros: They come to you, they cut the high-security HU100 key on site, and they have the professional tools to program the immobilizer. Typically cheaper than the dealer ($150–$250 total). Cons: Harder to verify OEM vs aftermarket stock in advance.
• Amazon or eBay (Online): You can easily find aftermarket fobs using the M3N-32337100 FCC ID online. Pros: Very cheap (often $15–$40 per fob). Cons: Quality is hit-or-miss. You still have to pay a professional to laser-cut the key and program it, and some locksmiths will not guarantee programming success on customer-supplied parts.

If on-board programming isn't supported

As mentioned, because the 2014 Sierra requires diagnostic programming, you are dealing with a strict immobilizer system. The key contains a transponder chip that communicates with the truck's anti-theft system. If the chip isn't recognized, the engine will be immobilized and will not crank.

Because you cannot bypass this system without an OBD2 tool, you should expect to pay a professional for their time and equipment if you do not buy a single-use DIY programmer kit. Typical programming-only fees from a locksmith range from $60 to $120, depending on your location. When calling for a quote, make sure you specify that it is a 2014 model with the high-security laser-cut blade.

Find a mobile locksmith or shop on Repairius.