GMC Sierra 1500 Key Fob Replacement 2014-2018 — Benbrook TX
Key fob replacement for a 2014-2018 GMC Sierra 1500 near Benbrook TX. What a replacement costs, why the truck splits between bladed and push-button keys, and how the theft-deterrent relearn works.
The K2XX-generation Sierra is one of the most common trucks on Benbrook and west Fort Worth roads, and it is also one of the most commonly misquoted for keys — because the same model year can take two completely different key types depending on trim. Sorting that out over the phone, before anyone drives anywhere, is what keeps the price honest. Call or text (817) 813-9396 for Sierra keys in Benbrook, Fort Worth, Annetta, Weatherford, Aledo, Willow Park and Hudson Oaks.
Quick Answer
A 2014-2018 GMC Sierra 1500 uses either a bladed transponder key with a separate remote, or a proximity smart key on push-button-start trims. Either way the key's credential must be registered into the truck's theft-deterrent system before the engine will run. As of August 2026, a spare typically runs $180 to $340, and all keys lost runs $320 to $600. Both are done at the truck.
Sierra 1500 Key Pricing near Benbrook TX
| Service | Typical Price Range | Notes |
|---|---|---|
| Spare bladed transponder key | $180–$300 | Key, VIN cut, programming |
| Spare proximity smart key | $230–$340 | Push-button trims |
| All keys lost | $320–$600 | Origination, relearn wait |
| Program a key you supply | $90–$180 | If part number matches |
| Remote-only replacement, separate fob | $80–$160 | Older split key-and-remote setup |
| Blade cut only | $60–$110 | Door access, will not start |
Disclaimer: Ranges only. Trim, key type, and model year change the number. Call or text (817) 813-9396 with your VIN for a firm quote.
Two Key Types, One Truck
This generation of Sierra spans a real transition, and the trim matters more than the year.
Bladed transponder key with a separate remote. Common on work trims and lower-spec trucks. The key goes into a conventional ignition and carries a chip; the lock and unlock buttons live on a separate keyless-entry remote. Two parts, sometimes replaced independently.
Proximity smart key. Push-button-start trims carry a single fob with a hidden emergency blade. The truck detects the fob's presence and authorizes the start button.
A quote given without knowing which one you have is a guess. The VIN answers it in under a minute, and it also settles the exact part number and FCC ID — details that similar-looking aftermarket fobs get wrong constantly.
If you also run a midsize GM truck, the same family logic applies — see our Chevrolet Colorado and GMC Canyon spare key guide.
The Theft-Deterrent Relearn
GM's immobilizer approach on these trucks means a key is not trusted until it has been through a relearn procedure that writes its credential into the truck.
Two things about that are worth knowing before you shop for a key.
First, cutting a blade is not programming. A hardware-store copy will open the door and turn the ignition, and the truck will crank and immediately die. That is the theft-deterrent system doing its job, not a broken key.
Second, some GM relearn procedures on these trucks involve a timed wait cycle — the truck sits with the ignition in a specific position for a set period before it will accept the new key. It cannot be shortened, and it is why an all-keys-lost visit takes noticeably longer than adding a spare. Budget the time rather than being surprised by it.
For the wider GM picture across models, our Chevrolet and GMC key replacement and theft-deterrent relearn guide covers the same system on other vehicles.
What Happens at the Appointment
Part confirmation before dispatch
VIN, trim, key type, part number. Two minutes on the phone eliminates the most common cause of a wasted appointment.
Voltage check
Programming holds the ignition on for an extended period. On a ten-year-old truck with a marginal battery, that can produce a failed write and a very confusing no-start. The battery gets checked and supported before anything is written.
Blade cutting
The blade — either the key itself or the emergency blade inside a smart fob — is cut to the code derived from your VIN, on a machine in the service van. Cutting to code beats duplicating a worn key, especially on a truck whose original has been on a keyring with a tailgate handle and a shop rag for a decade.
Credential registration
The key is written into the truck's theft-deterrent list. Bring every key you own, including any you think are dead — a flat battery in a remote takes seconds to test, and depending on procedure, keys not present can drop off the trusted list.
Verification
Lock, unlock, panic, remote start where fitted, tailgate release on trims that have it, and an actual engine start with the other key out of the cab.
Symptoms That Are Not a Key Problem
Buttons stopped working, truck starts fine. Coin-cell battery first. This is the answer far more often than a new fob.
Key turns hard or sticks in the cylinder. Mechanical ignition wear. A new key does not fix a worn cylinder, and this is a common way people spend money twice.
Cranks and dies every single time. Theft-deterrent refusal. If two independent keys behave identically, the truck side is more likely the problem than both keys at once.
Everything went strange after a battery replacement or a jump start. Extremely common on these trucks and usually not a key issue at all. Our guide to no-start after a battery replacement and what needs a relearn covers what actually happens.
Security light on, no crank. Worth reading our immobilizer and security light no-start guide before buying anything.
Buying a Sierra Key Online
Often sensible on this truck, with the usual traps:
Match the FCC ID. Printed on the back of your current fob. GM used several similar-looking fobs across the lineup in these years.
Do not mix key types. A bladed transponder key and a proximity fob are not substitutes in either direction.
Used fobs may be locked to a donor vehicle and unable to accept a new identity.
Blades come uncut. Expected — budget for the cut.
Send a photo of your existing fob's label before purchasing. It costs nothing to check and prevents a return.
Service Across Benbrook and West Fort Worth
Benbrook is a short run from the shop, and the equipment travels — driveway, apartment lot, job site, or the parking lot off the highway where the key disappeared. Coverage runs from Benbrook and Fort Worth west through Annetta, Aledo, Willow Park, Hudson Oaks and Weatherford, including evenings and weekends.
Frequently Asked Questions
How much is a replacement key for a 2016 GMC Sierra?
As of August 2026, a spare bladed transponder key typically runs $180 to $300 and a proximity smart key runs $230 to $340, including the VIN cut and programming. All keys lost runs $320 to $600. Your VIN and trim determine which applies.
Can a locksmith come to me in Benbrook for a Sierra key?
Yes. Cutting and programming equipment is carried in the service van and works through the truck's own diagnostic network, so the job is done wherever the truck is parked in Benbrook, west Fort Worth, or out toward Parker County.
Why does my copied key turn the ignition but not start the truck?
Because the blade and the chip are separate things. A copied blade turns the cylinder; the transponder credential still has to be registered into the truck's theft-deterrent system. Without that, the engine fires briefly and shuts down.
How long does a Sierra key take to program?
A spare is usually 30 to 60 minutes. All keys lost takes longer because GM's relearn procedure on these trucks includes a timed wait that cannot be shortened.
Do I have to go to the GMC dealership?
No. The programming happens through the truck's diagnostic port with portable equipment. A dealership visit adds a tow on a non-running truck and a wait for a service slot without adding capability.
My key fob buttons quit but the truck still starts — do I need a new fob?
Probably not. Start with the coin-cell battery. If a fresh battery does not restore the buttons, the remote may need re-pairing, which is a cheaper job than replacing the key outright.
Get the Sierra Keyed Today
Whether it is a spare before deer season or a truck sitting in a Benbrook lot with no key at all, the VIN gets you a real number. Call or text (817) 813-9396.
Article written by the Annetalocksmith Automotive Locksmith Team. Reviewed by a working automotive locksmith technician.