Restore Peak Performance to Your Chevrolet Impala
Is your 2010 or 2011 Chevrolet Impala suffering from frustrating issues like a persistent check engine light, poor fuel economy, stalling, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer responsible for managing your vehicle’s engine performance, emissions, and transmission. A faulty ECM can make your vehicle unreliable and unsafe. This replacement ECM, part number 12635901, is the definitive solution to restore your car’s original drivability and efficiency.
This isn’t just a part in a box; it’s a complete, ready-to-install solution. Upon purchase, we require your vehicle’s 17-digit Vehicle Identification Number (VIN). Our expert technicians will then program the module with the latest, most stable software updates directly from General Motors. This VIN-specific programming ensures that the ECM is a perfect match for your Impala’s specific configuration, including its engine, transmission, and factory options. This crucial step eliminates the need for expensive dealership programming and allows for a much simpler installation process.
From the Diagnostic Bay
We recently had a 2011 Impala in the shop that was driving the owner crazy. It had an intermittent stalling problem and a random misfire code (P0300) that wouldn’t go away, despite the owner replacing spark plugs, ignition coils, and fuel injectors. After hours of diagnostics, we hooked up an oscilloscope to the injector control circuits at the ECM. We discovered that the ECM itself was intermittently failing to send the signal to fire the injectors. It was a classic case of a failing internal driver. We installed one of our VIN-programmed modules, performed the quick security relearn, and the car ran perfectly. It’s a powerful reminder that the component controlling everything is often the root cause of the most elusive problems.
Common Symptoms of a Failing 2010-2011 Impala ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes, especially communication codes (U-codes) or internal processor fault codes.
- ✔ Unexplained drop in fuel efficiency.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Complete no-start or no-spark condition where the engine cranks but will not fire.
- ✔ Cooling fans running constantly or not turning on at all.
- ✔ Failure to pass state emissions testing.
A Plug-and-Play Solution for a Complex Problem
Replacing an ECM can seem daunting, but our pre-programming service simplifies the job immensely. By flashing the module to your VIN before shipping, we handle the most complex part of the repair. Once you receive the unit, the physical installation is straightforward, typically involving disconnecting the battery, unplugging the old module, and installing the new one. In most cases, a simple security relearn procedure (often called a ‘key-on/key-off’ cycle) is the only additional step required to sync the new ECM with your vehicle’s anti-theft system. This can usually be done in your driveway without any special tools.
Broad GM Compatibility
While this unit is a perfect fit for the 2010-2011 Impala, this versatile ECM was used across a wide range of General Motors vehicles. This part is a direct replacement for multiple service numbers, ensuring broad compatibility and OEM-level function. If your original module has one of the following numbers, this unit will work for you:
Compatible Service Numbers: 12597125, 12612397, 12594750, 12629019, 12635902, 12611549, and others.
This ECM is also found in models such as the Chevrolet Silverado 1500, Malibu, Cobalt, HHR, Express Van; GMC Sierra 1500, Savana Van; Pontiac G5, G6, Solstice; and Saturn Aura, Sky, and Vue. Please verify the part number on your original module to ensure a perfect match.
Frequently Asked Questions
Do I need to get this ECM programmed?
No. We handle the programming for you before we ship the part. All you need to do is provide us with your vehicle’s 17-digit VIN during or after checkout. We will flash the module with the correct GM software for your specific vehicle, making the installation process much simpler.
What is a security relearn procedure?
The security relearn, or anti-theft relearn, is a simple procedure that syncs the new ECM to your vehicle’s existing keys and security system. For most GM vehicles of this era, it involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. This allows the components to recognize each other. Instructions are readily available online for your specific model.
Where is the ECM located on my 2010-2011 Impala?
On the 2010-2011 Chevrolet Impala, the Engine Control Module (ECM) is typically located inside the air filter housing assembly. You will need to open or remove the air cleaner box to access it. Always disconnect the negative battery terminal before attempting to remove or install any electronic module.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM, then yes, this part will resolve the issue. However, the check engine light can be triggered by hundreds of potential problems. It is always best to have the vehicle properly diagnosed with a scan tool to confirm that the ECM is the source of the fault codes before ordering.
Is this a brand new part?
This is a high-quality, tested replacement part that has been meticulously inspected and prepared to meet or exceed original equipment standards. It is programmed with the latest GM software to ensure optimal performance and longevity.