Is your 2010-2012 Chevrolet Malibu 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 vehicle’s engine performance, fuel economy, and emissions. Don’t let a faulty ECM keep you off the road. This direct-fit ECM, part number 12678513, is the reliable solution to restore your vehicle’s original performance and drivability.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We program the module specifically to your vehicle’s Vehicle Identification Number (VIN) before it ships. This critical step ensures that the ECM communicates perfectly with your car’s existing systems, including the ignition, fuel injectors, and transmission. By loading the latest GM-certified software updates, we also ensure your vehicle benefits from any performance and efficiency improvements released since it left the factory. This eliminates the need for an expensive trip to the dealership for programming, saving you both time and money.
We had a 2011 Malibu come in with a complaint of intermittent stalling and a random P0606 (ECM Processor Fault) code. The owner had already replaced the throttle body and a couple of sensors based on advice from a forum, but the problem persisted. After hooking up our diagnostic scanner and monitoring live data, we noticed erratic voltage readings originating from the ECM’s internal processor. The external sensors were working fine; the computer itself was the source of the issue. We installed a VIN-programmed ECM, performed the security relearn procedure, and the car ran perfectly. It’s a textbook example of how chasing symptoms can be costly, while correctly identifying the root cause—a faulty ECM—provides the real fix.
Common Symptoms of a Failing 2010-2012 Malibu ECM
A failing engine computer can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following issues, your ECM could be the culprit:
- ✔ Check Engine Light: The light is on, and you may have codes related to module communication or processor faults (e.g., P0601, P0606).
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly, run rough, or misfire, especially under load.
- ✔ No-Start Condition: The engine cranks but refuses to start, indicating a potential loss of fuel injector or spark control.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in MPG can be caused by the ECM failing to properly manage the air-fuel mixture.
- ✔ Shifting Problems: In some cases, a bad ECM can interfere with communication to the transmission control module, leading to harsh or erratic shifting.
- ✔ Intermittent Issues: Problems that appear and disappear, often worsening as the engine warms up, can point to failing electronics within the module.
Simple Installation Process
Our goal is to make your repair as straightforward as possible. Here’s how it works:
- Place Your Order: Add this ECM to your cart and complete the checkout process.
- Provide Your VIN: After your purchase, reply to your order confirmation email with your vehicle’s 17-digit VIN. This is essential for programming.
- We Program & Ship: Our technicians will flash the module with your car’s specific software and the latest GM updates. We then ship the ready-to-install part directly to you.
- Install the Module: Simply disconnect the battery, remove the old ECM, and install the new one. Once installed, you will likely need to perform a simple security relearn procedure (often called a ‘key relearn’), which can typically be done without special tools. Instructions are readily available online or in service manuals.
Verified Vehicle Fitment
This ECM is a direct replacement for service numbers 12678513 and 12633264. It is compatible with the following vehicles and engine options:
- CHEVROLET MALIBU: 2010-2012 (3.6L Engine)
- CHEVROLET CAMARO: 2012 (3.6L, 6.2L – ID 12633264), 2013-2015 (6.2L – VIN P)
- CHEVROLET COLORADO: 2010-2012 (5.3L Engine)
- CHEVROLET CORVETTE: 2010-2013 (6.2L – VIN R or T, opt LS9)
- CADILLAC CTS: 2010-2013 (6.2L), 2014 (Cpe, Sdn, SW – 6.2L), 2015 (Cpe)
- GMC CANYON: 2010-2012 (5.3L Engine)
- HUMMER H3: 2010 (5.3L Engine)
Frequently Asked Questions
What is the difference between an ECM, ECU, and PCM?
These terms are often used interchangeably. ECM (Engine Control Module) and ECU (Engine Control Unit) refer to the same computer that manages engine functions. PCM (Powertrain Control Module) is a more inclusive term for a module that controls both the engine and the transmission. For your vehicle, this part serves as the primary engine computer.
Is this part difficult to install?
Physically replacing the module is straightforward for anyone with basic mechanical skills. It typically involves disconnecting the battery and removing a few bolts and electrical connectors. The only additional step is a security relearn procedure, which pairs the new ECM to your vehicle’s anti-theft system. This procedure can usually be done at home without special tools.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard, visible through the windshield.
What happens if I install this without having it programmed?
The module will not work. Programming installs the correct operating software for your Malibu’s specific engine, transmission, and options. Without the correct programming, the vehicle will not start or run properly. Our pre-programming service ensures it’s ready for installation when you receive it.
Does this part come with a warranty?
Yes, all of our electronic modules come with a warranty. Please see the warranty tab on this product page for specific details and duration of coverage.