Is your Chevrolet Malibu experiencing perplexing engine problems? A flashing check engine light, poor fuel economy, stalling, or a no-start condition can often point to a failing Engine Control Module (ECM), the brain of your vehicle’s engine management system. This replacement ECM, part number 12633264, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency. It arrives at your door pre-programmed with the latest official GM software, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This eliminates the need for expensive dealership programming, saving you time and money.
From the Diagnostic Bay
We had a 2011 Malibu with the 3.6L V6 come in on a tow truck. The owner had already replaced the fuel pump and all six spark plugs, chasing an intermittent no-start and rough idle condition. The codes were all over the place—random misfires, communication errors, you name it. After an hour of checking wiring harnesses and grounds, we hooked up a scope to the injector drivers at the ECM. We found that the signal for cylinder 3 was erratic. We swapped in one of our pre-programmed ECMs, performed the security relearn, and the engine fired up perfectly. It’s a classic case where a failing internal driver in the computer mimics a mechanical or sensor issue, costing the owner hundreds in unnecessary parts before finding the true source of the problem.
Is Your Vehicle Showing Signs of ECM Failure?
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, it might be time to inspect your ECM.
- ✔ Unexplained Check Engine Light (CEL) illumination, especially with communication-related trouble codes (U-codes).
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Intermittent or complete no-start conditions where the engine cranks but won’t fire.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass emissions testing due to readiness monitor issues.
- ✔ Inconsistent performance that seems to have no other logical cause.
The Plug-and-Play Solution for your 2010-2012 Malibu ECM
Replacing an ECM used to be a job reserved for the dealership, involving complex and expensive programming tools. We’ve simplified the process. When you purchase this module, you provide us with your vehicle’s VIN. Our technicians then flash the unit with the most current GM-certified calibration for your exact make, model, and options. This ensures that all engine parameters, transmission shift points, and emissions controls function exactly as the factory intended. The module you receive is ready for installation, making the repair straightforward for a DIY mechanic or a professional technician. In most cases, a simple security relearn procedure (often called a key relearn) is all that’s needed to get you back on the road.
This ECM, service number 12633264, is also a direct replacement for service number 12678513. It is a genuine OEM-quality component designed for durability and precise operation. Don’t let a faulty computer keep your car off the road. Restore its peak performance and reliability with this pre-programmed engine control module.
Broad GM Vehicle Compatibility
While this is a perfect fit for the 2010-2012 Malibu with the 3.6L engine, this versatile ECM is also the correct component for a wide range of other GM vehicles, including high-performance and utility models. Please verify your part number and application from the list below:
- CANYON 2010-2012 (RH firewall), 5.3L
- COLORADO 2010-2012 (RH firewall), 5.3L
- HUMMER H3 2010 (RH firewall), 5.3L
- CAMARO 2012 (3.6L or 6.2L, ID 12633264)
- CAMARO 2013-2015 (6.2L, VIN P, opt LSA)
- CORVETTE 2010-2013 (6.2L, VIN R or T, opt LS9)
- CTS 2010-2013 (6.2L)
- CTS 2014 (Coupe, Sedan, or Wagon, 6.2L)
- CTS 2015 (Coupe)
Frequently Asked Questions
What is an ECM and what does it do?
The ECM, or Engine Control Module, is a powerful computer that acts as the ‘brain’ of your vehicle’s engine. It takes data from sensors all over the engine and uses it to control fuel injection, ignition timing, emissions systems, and more to ensure optimal performance and efficiency.
What happens after I order this part?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). Our technicians will use your VIN to program the ECM with the latest GM software specific to your vehicle’s configuration. The module is then shipped to you, ready for installation.
Is any additional programming required after installation?
This ECM comes fully programmed for engine and transmission operation. However, you will likely need to perform a security relearn procedure (also known as a key relearn or anti-theft relearn) so the module communicates with your vehicle’s keys. This procedure can typically be done without special tools and instructions are widely available online. A crankshaft position variation relearn may also be needed in some cases, which requires a scan tool.
Will this ECM fix my check engine light?
If the check engine light is on due to an internal failure of your original ECM, then yes, this part will resolve the issue. However, it’s crucial to properly diagnose the vehicle first, as the check engine light can be caused by many other components like sensors, wiring, or mechanical problems.
What is the difference between part numbers 12633264 and 12678513?
These are interchangeable GM service numbers for the same hardware. Part numbers are often updated over time. As long as your original module is one of these numbers, this unit is a correct replacement.