Is your vehicle running rough, stalling, or showing a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your engine’s performance. Don’t let a faulty computer keep you off the road. This genuine, used GM Engine Control Module, service number 12669908, is the reliable and effective solution to restore your vehicle’s peak operational condition.
This isn’t just a part in a box. We take the hassle out of the repair by pre-programming this ECM specifically to your vehicle’s Vehicle Identification Number (VIN). By using the latest official software updates from GM, we ensure that the module you receive has the correct calibrations for your exact make, model, and engine configuration. This critical step saves you a trip to the dealership and eliminates compatibility guesswork, getting you closer to a successful repair right from the start.
We had a 2018 Chevy Equinox come in with a persistent P0300 random misfire code. The owner had already spent hundreds replacing all the spark plugs, ignition coils, and even the mass airflow sensor, but the problem remained. The engine idled poorly and hesitated on acceleration. After hooking up our diagnostic scanner, we noticed erratic fuel trim data. Instead of continuing to throw parts at it, we monitored the ECM’s command signals. We found the injector pulse width commands were inconsistent. We swapped in a known-good, programmed ECM, and the engine immediately smoothed out. The issue wasn’t a bad sensor or coil; the original ECM was failing and making poor decisions. This highlights how a faulty module can mimic other component failures, making a correct diagnosis essential.
Why Choose Our Pre-Programmed GM ECM 12669908?
The Engine Control Module is the brain of your vehicle’s powertrain. It processes information from dozens of sensors to control critical functions like fuel injection, ignition timing, and emissions systems. When it fails, the symptoms can be widespread and confusing. Our pre-programmed GM ECM 12669908 provides a direct path to resolving these complex issues. Sourced from salvaged vehicles and thoroughly tested for functionality, this unit offers a dependable alternative to expensive new parts. We handle the complex programming so you can focus on the installation.
Is Your Vehicle Showing Signs of ECM Failure?
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ No-start or hard-start conditions, especially when warm
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or erratic idling
- ✔ Failure to pass emissions testing
- ✔ Communication errors with diagnostic scan tools
Upon receiving your order, we will contact you to obtain your vehicle’s VIN. Our technicians will then flash the module with the specific software for your car. Once installed, the final step required is a security relearn, often called a vehicle theft deterrent relearn. This procedure pairs the new ECM to your vehicle’s anti-theft system and keys. This is a standard procedure for this type of repair and may require a professional scan tool or access to GM’s TIS2Web system. Other vehicle-specific relearns, such as for the crankshaft position sensor or fuel injectors, may also be necessary to ensure optimal performance.
This module is a direct fit for a wide range of General Motors vehicles. Please verify that your original module carries the service number 12669908 to ensure perfect compatibility. This part is known to fit models such as the Chevrolet Volt, Equinox, Malibu, Cruze; Cadillac ATS, CTS; Buick Regal, LaCrosse; and GMC Acadia across various model years and engine options.
Frequently Asked Questions
What is an ECM and what does it do?
The ECM, or Engine Control Module, is your car’s main computer for the engine. It takes data from sensors all over the engine (like oxygen, temperature, and crankshaft position sensors) and uses it to control fuel delivery, spark timing, and emissions, ensuring the engine runs efficiently and powerfully.
How do I provide my VIN for programming?
After you complete your purchase, we will reach out to you via email to request your 17-digit Vehicle Identification Number (VIN). Please reply promptly with the correct VIN to avoid any delays in programming and shipping your part.
Is this part new or used?
This is a genuine, used OEM part that has been carefully sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
What do I need to do after installing this ECM?
After installation, you or your mechanic will need to perform a vehicle theft deterrent relearn. This procedure syncs the ECM with your car’s security system. In some cases, other relearns like a crankshaft variation relearn may also be required. This is the responsibility of the installer.
Will this ECM fit my 2020 Buick Envision?
While the initial search may have been for a 2020 Envision, this specific part number, 12669908, fits a wide range of other GM vehicles from approximately 2017-2019, including the Equinox, Malibu, and Acadia. It is critical to match the service number (serv. no) from your original ECM to 12669908 to guarantee compatibility.
What if my car still doesn’t start after the security relearn?
If a no-start condition persists after a successful security relearn, it indicates the original problem may not have been the ECM. We guarantee our programming is correct for the VIN you provide, but we cannot diagnose your vehicle remotely. You should re-check all connections, fuses, and consider other potential causes like fuel or ignition system issues.