Restore Your Sierra’s Performance and Reliability
Is your 2012-2016 GMC Sierra 3500 running rough, throwing confusing check engine light codes, or refusing to start? A failing Engine Control Module (ECM) is often the culprit. As the central computer for your truck’s powertrain, the ECM manages everything from fuel injection and ignition timing to transmission shifting. When it falters, the symptoms can be frustrating and difficult to diagnose. This module is the definitive, hassle-free solution to get your workhorse back on the job.
We take the guesswork and expensive dealership trips out of the equation. This ECM, part number 22819494, arrives at your door pre-programmed with the latest official GM software updates, specifically matched to your truck’s Vehicle Identification Number (VIN). This isn’t just a replacement part; it’s a direct-fit solution that ensures all systems communicate correctly from the moment of installation, restoring the smooth operation and efficiency you expect from your Sierra.
Case Study: A Tricky Diagnosis
I had a 2014 Sierra 2500 (with the same 6.0L engine and ECM) come into my bay with a complaint of intermittent stalling at stoplights and a persistent P0606 code (ECM/PCM Processor Fault). The owner had already replaced the throttle body and a few sensors with no luck. The symptoms were inconsistent, which is classic for an internal module failure. We confirmed all power and ground circuits to the ECM were solid. Instead of sending him to the dealer for a costly programming session, we installed one of these VIN-programmed modules. The entire job took less than 30 minutes. The P0606 code was gone for good, and the truck ran perfectly. This is the kind of straightforward fix that saves both time and money.
Is Your Sierra Showing These Signs of a Bad ECM?
- ✔ Check Engine Light is on with codes like P0601, P0606, or other communication errors (U-codes).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Apparent loss of power and performance.
- ✔ Other warning lights (like traction control) illuminate without a clear cause.
A Straightforward Guide to Installation
Replacing the ECM on your Sierra 3500 is a job most DIYers can handle with basic tools. The module is typically located in the front, left-hand side of the engine compartment.
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the ECM: Find the module on the driver’s side of the engine bay. It will have several large electrical connectors attached.
- Disconnect Connectors: Carefully release the locking tabs and unplug all electrical harnesses from the old ECM. Avoid forcing them.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed ECM into place.
- Reconnect Everything: Securely plug all electrical connectors into the new module. You should hear or feel a click as they lock. Reconnect the negative battery terminal.
- Final Steps: In some cases, a vehicle security relearn procedure may be required. This can typically be done without special tools by cycling the key in the ignition. Your vehicle’s service manual will have the specific procedure. Start the engine and check for proper operation.
Verified Vehicle Compatibility
This Engine Control Module is a direct replacement for part number 22819494 and other interchangeable numbers. While this listing is focused on the 2012-2016 Sierra 3500 ECM, it also fits a wide range of other GM vehicles. Please verify your part number or contact us with your VIN to ensure compatibility.
Compatible Part Numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, 12692200
Select Fitment Includes:
- ✔ 2012-2016 Sierra 2500/3500 Pickup (6.0L)
- ✔ 2012-2016 Silverado 2500/3500 Pickup (6.0L)
- ✔ 2016 Express/Savana 2500/3500 Van (4.8L, 6.0L)
- ✔ 2012-2016 Chevrolet Cruze, Sonic, Trax
- ✔ 2013-2016 Buick Encore
- ✔ 2011-2016 Chevrolet Volt & Cadillac ELR
- …and more. Please check the full fitment list or contact us.
What exactly is VIN programming?
VIN programming involves loading your vehicle’s specific identification number and factory-correct software onto the ECM before it ships. This ensures the module communicates perfectly with your truck’s engine, transmission, and security systems, just like the original part from the factory. It eliminates the need for expensive dealer tools.
Is any additional programming needed after installation?
No, this module arrives ready to install. The only potential step is a simple key-cycle security relearn procedure, which you can do yourself in your driveway. Instructions are widely available online or in your vehicle’s service manual.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit VIN. We cannot process and program your order without it. Your VIN is typically found on your driver’s side door jamb sticker or on the dashboard viewable through the windshield.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (e.g., codes P0601-P0606), this part is the correct solution. However, you should always properly diagnose the cause of the light, as it could be related to a faulty sensor or other component.
Is this a used or repaired part?
This is a high-quality, tested replacement part that is guaranteed to function correctly. Each module is inspected and then programmed with the latest software for your specific vehicle, ensuring reliability.