Is Your Chevrolet Impala Running Rough?
If your 2010 or 2011 Chevrolet Impala is experiencing frustrating issues like a persistent check engine light, poor fuel economy, stalling, or a complete no-start condition, the problem may lie with a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the symptoms can be widespread and difficult to diagnose. This replacement ECM, part number 12611549, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We recently had a 2011 Impala towed in that had its owner completely stumped. The car would crank but wouldn’t start, and when it occasionally did, it ran terribly and threw a dozen different codes. The owner had already replaced the fuel pump and spark plugs with no success. After hooking up our diagnostic tools, we noticed erratic data from multiple sensors and communication failures between modules. This pointed directly to the central processor – the ECM. The owner had considered buying a used module from a salvage yard, but we explained that without proper VIN programming, it would be a useless metal box. We installed one of our VIN-programmed units, performed the quick security relearn, and the car fired up instantly and ran as smoothly as the day it left the factory. Don’t waste time and money on guesswork; a correctly programmed ECM is critical.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling, misfiring, or running rough
- ✔ Noticeable decrease in fuel efficiency
- ✔ Vehicle entering ‘limp mode’ with reduced power
- ✔ Transmission shifting issues or harsh engagement
- ✔ Complete failure to start the engine (no spark or no fuel)
- ✔ Communication errors with diagnostic scan tools
The Plug-and-Play Solution: A Pre-Programmed 2010-2011 Impala ECM
Replacing the ECM on your Impala doesn’t have to be a complicated ordeal that ends with a tow to the dealership. We eliminate the most difficult step by pre-programming this module specifically for your vehicle. When you place your order, simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then flash the unit with the latest, most stable GM-certified software for your exact car. This ensures that the module communicates perfectly with your Impala’s existing components, including the engine, transmission, and anti-theft system.
This module is a direct replacement for service number 12611549 and is also compatible with a wide range of other GM part numbers, including 12597125, 12612397, 12594750, 12629019, and 12635902. It’s built to meet or exceed original equipment specifications, providing a reliable and long-lasting repair.
Installation and Setup
Once you receive your pre-programmed ECM, installation is straightforward. The ECM on the 2010-2011 Impala is typically located in the lower part of the air cleaner box assembly, making it accessible for a DIY mechanic. After physically swapping the modules, you may need to perform a simple security relearn procedure (also known as a VATS relearn). This process allows the new ECM to synchronize with your vehicle’s anti-theft system and keys. It can typically be done in your driveway in about 30 minutes without any special tools. Instructions for this procedure are widely available and easy to follow. In some cases, a Crankshaft Variation (CASE) relearn may be needed to clear a P1336 code, which requires a capable scan tool.
Frequently Asked Questions
Do I need to have this ECM programmed?
No. We handle the programming for you before shipment. All you need to do is provide your vehicle’s VIN during checkout, and we will flash the module with the correct GM software for your specific car. It arrives ready for installation.
What tools are needed for installation?
Basic hand tools like a socket set are all that’s required to physically replace the module. No special programming tools are needed. However, you may need to perform a security relearn procedure, which involves a sequence of key turns in the ignition.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty ECM, then this part will be the correct fix. It is crucial to have your vehicle properly diagnosed to ensure the ECM is the root cause of the problem, as other failing sensors or wiring issues can sometimes mimic ECM failure.
Where is the ECM located on my 2010-2011 Impala?
The Engine Control Module on this generation of Chevrolet Impala is located inside the lower portion of the air cleaner filter box assembly in the engine bay. This placement protects it from excessive heat and vibration.
What other vehicles does this part fit?
While this listing is focused on the Impala, this versatile ECM (service no. 12611549 and its equivalents) also fits a wide variety of other GM vehicles, including certain model years of the Silverado, Malibu, Cobalt, HHR, G6, and more. Please verify the part number for your specific application.