Is your Chevrolet Malibu or other compatible GM vehicle suffering from frustrating and hard-to-diagnose engine problems? A faulty Engine Control Module (ECM) is often the hidden culprit behind issues like a persistent check engine light, poor engine performance, stalling, or even a no-start condition. This direct-fit ECM, compatible with service number 12638026 and others, is the definitive solution to restore your vehicle’s factory performance and reliability.
The ECM is the central computer of your vehicle’s powertrain, responsible for managing everything from fuel mixture and ignition timing to transmission shift points and emissions controls. When it fails, it can create a cascade of problems that can be mistaken for bad sensors or other mechanical failures. Instead of chasing down endless potential issues, replacing the core component can save you time, money, and headaches.
We take the guesswork and complexity out of the replacement process. Unlike a generic module from a parts store or salvage yard, each unit we ship is professionally programmed with the latest GM-certified software updates. We use the Vehicle Identification Number (VIN) you provide at checkout to ensure the module is a perfect match for your vehicle’s specific configuration, options, and anti-theft system. This VIN-specific programming is critical for a seamless installation and proper vehicle operation.
From the Diagnostic Bay
We had a 2011 Malibu come in that was driving the owner crazy. It would randomly stall at stoplights and had a rough idle, but threw no consistent codes. The owner had already replaced the MAP sensor and cleaned the throttle body with no luck. After hooking up our professional scan tool, we noticed the live data for the ignition timing was erratic and jumping all over the place. This wasn’t a sensor issue; the ECM’s internal processor was failing under load. We installed a VIN-programmed ECM just like this one, performed the 10-minute security relearn, and the car ran like new. It’s a classic case of the ‘brain’ failing, not the ‘senses’.
Common Symptoms of a Failing 2007-2012 Malibu ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or erratic idling
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Vehicle cranks but refuses to start
- ✔ Communication error codes (U-codes) stored in the system
- ✔ Misfire codes even after replacing plugs and coils
This module is a direct replacement for multiple service numbers, including 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549, ensuring wide compatibility across a range of GM vehicles like the Chevrolet Cobalt, HHR, Impala, GMC Sierra, Pontiac G6, Saturn Aura, and more. Please verify your part number and consult the fitment list to confirm compatibility. Upon installation, a simple security relearn procedure may be required, which typically can be performed without special tools and instructions are readily available online.
Don’t let a faulty computer keep your car off the road. Restore its performance and dependability with this professionally programmed engine control module. Provide your VIN at checkout and let us handle the complex part, so you can enjoy a simple, plug-and-play style repair.
What is an ECM and what does it do?
The Engine Control Module (ECM), sometimes called the Powertrain Control Module (PCM), is your vehicle’s main computer. It controls the engine’s fuel injection, spark timing, and emissions systems to ensure optimal performance, fuel efficiency, and low emissions. It’s essentially the brain of your engine.
Will this ECM be plug-and-play?
Yes, this ECM comes pre-programmed to your vehicle’s specific VIN. This means it is ready to be installed without needing a trip to the dealership for expensive programming. In most cases, you will only need to perform a simple security relearn procedure (also known as a key relearn), which can be done in your driveway in about 10-15 minutes.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add this as a note during checkout or send it to us in a message referencing your order number. We cannot ship your part until we receive the VIN.
Where is the ECM located on my 2007-2012 Malibu?
On many GM vehicles from this era, including the Malibu, the ECM is located in the engine bay. It’s often found on the driver’s side, near the air filter box or under the battery tray. It is a silver metal box with multiple large electrical connectors. Always disconnect the vehicle’s battery before attempting to remove or install the ECM.
Does this part fit other vehicles besides the Malibu?
Absolutely. This ECM is compatible with a wide range of GM models and years, including the Chevy Cobalt, HHR, Impala, Silverado 1500, GMC Sierra 1500, Pontiac G6, Saturn Aura, and more. Please refer to the detailed fitment list on this page to confirm it matches your specific make, model, year, and engine option.