Is your 2012-2016 GMC Sierra 2500 running rough, stalling, or showing a persistent Check Engine Light? You’re not just losing power; you’re losing confidence in your truck. A faulty Engine Control Module (ECM) is often the culprit, acting like a confused brain for your vehicle’s most critical functions. This isn’t just an inconvenience; it affects fuel economy, emissions, and overall drivability. Stop throwing money at parts that don’t fix the problem. This is the definitive solution.
We offer a professionally prepared Engine Control Module, part number 22819494, that arrives at your door completely programmed to your truck’s specific Vehicle Identification Number (VIN). We load the latest GM-certified software, ensuring that once installed, it communicates flawlessly with your engine, transmission, and other onboard systems. This eliminates the need for expensive dealership programming or specialized scan tools, making it a direct-fit, ready-to-install fix for both seasoned mechanics and determined DIYers.
A Technician’s Notebook: The Intermittent Stall on a 6.0L
I had a 2014 Sierra 2500 in the bay that was driving the owner crazy. It would run perfectly for days, then suddenly stall at a red light or hesitate badly on acceleration. No consistent codes, just a history of random communication faults. Two other shops had replaced the throttle body and a fuel pump to no avail. After hooking up my scope and monitoring the 5-volt reference circuits from the ECM during a long test drive, I saw the voltage drop out intermittently as the engine bay heated up. It was a classic case of internal ECM failure caused by thousands of heat cycles. We installed a VIN-programmed module like this one, and the truck has been running perfectly ever since. Sometimes, the problem really is the brain, not the body.
Is Your Sierra Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is your likely solution:
- ✔ Check Engine Light is on with codes like P0601, P0602, P0606 (Internal Control Module Processor Error) or U0100 (Lost Communication with ECM/PCM).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ Rough or unstable idling.
- ✔ The transmission shifts harshly or at the wrong times.
- ✔ Intermittent stalling or hesitation during acceleration.
- ✔ Communication issues with diagnostic scan tools.
Your Straightforward ECM Installation Guide
Replacing the 2012-2016 Sierra 2500 ECM is a manageable job you can do at home. Since we’ve handled the programming, it’s a true plug-and-play process. Follow these general steps:
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the ECM: On the Sierra 2500, the ECM is typically found in the engine compartment on the driver’s side, near the firewall or inner fender.
- Disconnect Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Do not force them.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will need it for the new module.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect and Secure: Plug the wiring harnesses back into the new ECM. You should hear and feel them click into place. Ensure the locking tabs are fully engaged.
- Final Step: Reconnect the negative battery terminal. The vehicle may need to complete a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes before starting.
Guaranteed Fitment for Your GM Vehicle
This module, corresponding to part number 22819494, is a direct replacement for a wide array of General Motors vehicles. It also interchanges with part numbers 12668866, 12668994, 12643636, 12663405, 12670335, and 12692200. Please verify your vehicle is on the list below for guaranteed compatibility:
- ✔ Buick Encore: 2013-2016 (1.4L)
- ✔ Cadillac ELR: 2014-2016
- ✔ Chevrolet Cruze: 2012-2016 (Gasoline)
- ✔ Chevrolet Express 2500/3500 Van: 2016 (4.8L, 6.0L)
- ✔ Chevrolet Silverado 2500/3500 Pickup: 2012-2016 (6.0L)
- ✔ Chevrolet Sonic: 2012-2016 (1.4L)
- ✔ Chevrolet Spark: 2014-2015 (Gasoline)
- ✔ Chevrolet Suburban 3500: 2016
- ✔ Chevrolet Trax: 2013-2016
- ✔ Chevrolet Volt: 2011-2015
- ✔ GMC Savana 2500/3500 Van: 2016 (4.8L, 6.0L)
- ✔ GMC Sierra 2500/3500 Pickup (incl. Denali): 2012-2016 (6.0L)
Frequently Asked Questions
What exactly is VIN programming?
VIN programming is the process of loading your vehicle’s specific software and operational parameters onto the ECM. This includes information about your engine, transmission, emissions equipment, and security system. By providing us your VIN, we ensure the module we send you is a perfect digital match for your truck, making installation simple and effective.
Do I need to do anything after I install it?
In most cases, no. The module is sent ready for installation. Some GM vehicles may require a simple security relearn procedure, which can be done without any special tools. This typically involves leaving the key in the ‘ON’ position for about 10-15 minutes before starting the engine for the first time.
How do I provide my VIN after purchase?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot program and ship your module until we receive this information, so please provide it promptly to avoid delays.
Is this a reliable, long-term fix?
Absolutely. We provide high-quality, tested original equipment modules that are programmed with the latest stable software from GM. This addresses common failure points and restores your vehicle’s factory performance and reliability, ensuring a lasting repair.
Will this fix my transmission shifting problems?
If the hard shifting or erratic behavior is caused by bad data or failed drivers within the ECM, then yes, this will resolve the issue. The ECM plays a critical role in controlling transmission shift points and line pressure. A healthy ECM is essential for a smooth-shifting transmission.