GPEC (Global Powertrain Engine Controller) is the Continental-built PCM family used across FCA and Stellantis vehicles including Dodge, Jeep, RAM, Chrysler, Fiat and Alfa Romeo. From roughly 2013-2015 onward these controllers use RSA encryption that blocks calibration writes over OBD-II until the module is unlocked.

How do I know if I have a GPEC2 or GPEC2A?

GPEC2 uses an MPC5566 processor and reads at about 3 MB. GPEC2A uses an MPC5674F and reads at about 4 MB. By year, 2013-2015 Dodge and Jeep applications are usually GPEC2 and 2015-2023 Charger, Challenger, Durango, Grand Cherokee and RAM 1500 are usually GPEC2A.

Can a GPEC5 PCM be unlocked?

GPEC5 is the newest MPC5777-based Stellantis controller found in the Jeep Wrangler JL, Gladiator JT, RAM 1500 TRX and RAM 5.7 eTorque. Support is application-specific rather than universal. Contact N2 Speed with your VIN to confirm whether your specific application can be serviced before ordering.

Is a PCM unlock the same as a security gateway bypass?

No. The PCM lock is encryption inside the controller and requires a bench unlock. The Security Gateway Module (SGW) on 2018+ FCA vehicles sits on the vehicle CAN bus and requires a bypass cable. On 2018 and newer vehicles you generally need both.

How long does a GPEC unlock take?

N2 Speed typically completes GPEC bench unlocks within 1-2 business days of receiving the module, then ships it back with tracking.

Will unlocking damage my PCM?

Performed on a professional bench with a full flash and EEPROM backup taken beforehand, no. N2 Speed backs up the module before any work and performs a verification read after the unlock.

What is a PCM unlock?

A PCM unlock removes the factory encryption from the Powertrain Control Module so professional tuning tools can read and write calibration data. On most 2015+ Dodge, Jeep, Chrysler, and RAM vehicles, unlocking is required before custom tuning can be performed.

Why do 2015+ Dodge, Jeep, and RAM vehicles require unlocking?

Starting in 2015, FCA implemented security protocols that restrict tuning access through the OBD port on many vehicles. Unlocking enables calibration access so changes to airflow, torque management, fueling, and other tables can be flashed safely.

Do I have to mail in my PCM?

Yes. The unlock process is performed on a bench and requires the PCM to be removed from the vehicle and shipped in for service. Once unlocked, the PCM can typically be read and written via OBD using supported tuning platforms.

How long does the PCM unlock process take?

Typical turnaround is 1–3 business days after the PCM is received, plus shipping time. Tracking is provided when the module ships back.

What vehicles commonly need a PCM unlock?

Most 2015+ Dodge, Jeep, Chrysler, and RAM vehicles with encrypted controllers require unlocking before tuning. Common examples include 2015+ Charger, Challenger, 300, Grand Cherokee, and RAM 1500. If you are unsure, provide your VIN and we can verify.

What controllers are supported for PCM unlocking?

Common encrypted FCA controllers include GPEC2A, GPEC3, GPEC5, and NGC. Compatibility can vary by year and model, so VIN verification is recommended if you are not sure which PCM your vehicle uses.

Is a PCM unlock safe?

Yes. Unlocking is designed to enable calibration access and does not change stock drivability by itself. The vehicle will operate normally on a stock calibration or a custom tune after unlocking.

Can I return the PCM to stock after it is unlocked?

Yes. An unlocked PCM can still run a stock calibration file. Unlocking enables access, but you can flash stock or custom files as needed using a supported tuning platform.

Will unlocking void my warranty?

Unlocking enables tuning access, and any calibration changes may affect manufacturer warranty coverage. If warranty is a concern, some customers keep their original PCM stock and use a spare PCM for modifications.

Do I still need HP Tuners credits after unlocking?

Yes. Unlocking enables access, but you still need the appropriate interface and licensing (credits) to read, license, and flash the vehicle with HP Tuners or other supported tools.

Can you tune my vehicle after unlocking?

Yes. We offer custom remote tuning for bolt-ons, camshaft upgrades, injector scaling, boost setups, and torque model optimization. Pairing an unlock with a custom calibration is the best way to improve performance and drivability.

GPEC PCM Unlock Guide: GPEC2, GPEC2A, GPEC3, GPEC4 & GPEC5 | N2 Speed

Q: Can a GPEC2A be unlocked over OBD?

No. The initial GPEC2A unlock is a boot-mode bench operation that requires the PCM to be removed and sent in. After the unlock, calibration writes can be performed over the OBD-II port in the vehicle.

GPEC PCM Unlock Guide: GPEC2, GPEC2A, GPEC3, GPEC4, GPEC4LM & GPEC5

If your tuning software throws a security or write error on a 2013 or newer Dodge, Jeep, RAM, Chrysler, Fiat or Alfa Romeo, the cause is almost always the Continental GPEC engine controller. This is the complete reference: what each GPEC generation is, how to identify the one in your vehicle, whether it can be unlocked, and what the unlock actually costs and takes. N2 Speed performs GPEC bench unlocks in Pompano Beach, FL with a typical 1–2 business day turnaround.

What is a GPEC PCM?

GPEC stands for Global Powertrain Engine Controller — the Continental-built PCM/ECM family used across FCA and Stellantis vehicles. Beginning around the 2013–2015 model years, these controllers shipped with RSA encryption that blocks calibration writes through the OBD-II port. A GPEC unlock is a bench-level procedure that removes that write restriction so HP Tuners or DiabloSport can read and flash a custom calibration. It does not add power by itself — it is the gate you must pass before any custom tuning is possible.

GPEC generations at a glance

Controller	Processor / size	Typical years & vehicles	Unlock status
GPEC1	Early Continental	~2011–2013 Pentastar and HEMI applications	Generally OBD-tunable, no unlock required
GPEC2	MPC5566, 3 MB	2013–2018 Charger, Challenger, 300, Grand Cherokee, RAM 1500 — 3.6L, 5.7L	Bench unlock available
GPEC2A	MPC5674F, 4 MB	2015–2023 Charger, Challenger, Durango, Grand Cherokee / SRT / Trackhawk, RAM 1500 — 5.7L HEMI, 6.4L 392, 6.2L Hellcat	Bench unlock available — the most common unlock we perform
GPEC3	MPC5674F, 4 MB	Later Stellantis petrol applications	Bench unlock available
GPEC4 / GPEC4LM	MPC5674F	2016+ Compass, Renegade, Hornet, Tonale, 500X, Grand Cherokee 3.6L	Bench unlock available; some applications now OBD
GPEC5	MPC5777	2018+ Wrangler JL 3.6L, 2021+ Gladiator JT 3.6L, 2021+ RAM 1500 TRX 6.2L, 2023+ RAM 1500 5.7L eTorque, Promaster 3.6L, 3.0L Hurricane platforms	Limited — newest generation, application-specific. Contact us to confirm your VIN before ordering.

How to identify which GPEC you have

Start with year, engine and platform. A 2015–2023 5.7L or 6.4L Charger, Challenger, Durango, Grand Cherokee or RAM 1500 is almost always GPEC2A. A 2013–2015 car with the same engines is usually GPEC2.
Check the file size on a read. GPEC2 reads at roughly 3 MB (MPC5566). GPEC2A and GPEC3 read at roughly 4 MB (MPC5674F). That is the fastest way to tell 2 from 2A.
Read the label on the PCM. The Continental part number and hardware revision are printed on the module case, next to the Mopar part number.
Jeep Wrangler JL, Gladiator JT, RAM TRX and 5.7 eTorque are the tell-tale GPEC5 platforms. If your tool reports "unsupported ECU" on one of these, that is why.
Still unsure? Send us your year, model, engine and VIN and we will identify the controller for you before you buy anything.

Do I need an unlock, or just a security gateway bypass?

These are two different problems and people mix them up constantly.

PCM lock (encryption) — lives inside the controller. Requires a bench unlock with the module removed. This is what a GPEC unlock service solves.
Security Gateway Module (SGW) — added by FCA on 2018+ vehicles, sits on the CAN bus in the car. It blocks write commands over OBD even after the PCM is unlocked. It is solved with an SGW bypass cable, not a bench service.

On a 2018 or newer vehicle you typically need both: the PCM unlocked, and an SGW bypass cable to flash it in the car.

What a GPEC bench unlock includes at N2 Speed

Full backup read of flash and EEPROM before any work is performed
Update to the latest factory OS / calibration where applicable
Professional bench unlock configured for your chosen platform — HP Tuners or DiabloSport
Verification read after unlock, so the module leaves confirmed working
Optional VIN programming, SKIM / security reset, MDS delete and speed limiter removal
Return shipping with tracking, typically 1–2 business days after receipt

The mail-in process

Pick your tuning platform first — HP Tuners or DiabloSport. The unlock is configured for one of them.
Order the matching service and select your platform at checkout.
Remove and ship the module only — not the vehicle — to N2 Speed, 1461 SW 30th Ave, Bay 16, Pompano Beach, FL 33069. Include your order number.
We unlock and verify it, typically within 1–2 business days of arrival.
It ships back with tracking. Reinstall, connect your device, and flash.
Optional: add a custom remote tune for your exact mod list, handled entirely over email with datalogs.

GPEC unlock FAQ

Can a GPEC2A be unlocked over OBD? No. The initial unlock is a boot-mode operation that requires the module on a bench. Once unlocked, subsequent calibration writes can be done over OBD in the vehicle.

Can GPEC5 be unlocked? GPEC5 is the newest MPC5777-based controller and support is application-specific rather than universal. Some Jeep and RAM applications are now serviceable; others are not yet. Send us your VIN and we will confirm before you order or ship anything.

Will unlocking damage or brick my PCM? Performed correctly on a bench with a full prior backup, no. We back up flash and EEPROM before touching the module and verify it after.

Does the unlock void anything at the dealer? The unlock itself does not change how factory tools service the module — the dealer can still read and program it normally. Modified calibrations are a separate matter and can affect powertrain warranty coverage.

Do I have to send the whole car? No. Only the PCM or TCM. That is the entire advantage of a mail-in bench service — you can be anywhere in the country.

How much does a GPEC unlock cost and how long does it take? Pricing depends on the controller and whether you need extras like VIN programming or a SKIM reset. Turnaround is typically 1–2 business days from the day your module arrives. See the service listings below for current pricing.

What about the TCM? Transmission controllers are a separate service. We flash NAG1, ZF 8HP70/75/90 and 10-speed TCMs for shift strategy, torque management and line pressure.

Shop GPEC unlock and bench tuning services

Talk to a tech before you ship

Not sure which controller you have or whether it can be unlocked? Call (954) 998-9900 or email info@n2speed.com with your year, model, engine and VIN. We will identify the controller and tell you straight whether we can do it.

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