Is your vehicle’s engine computer failing? Restore its core functionality with our professionally programmed Engine Control Module (ECM), part number 12629020. This module is the central command center for your engine’s performance, fuel delivery, and emissions systems. A faulty ECM can lead to a host of frustrating and difficult-to-diagnose issues. This replacement unit is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN), ensuring it has the correct software and calibrations directly from GM’s latest updates. This eliminates guesswork and provides a reliable foundation for restoring your vehicle’s performance and dependability.
The Engine Control Module, often called the Powertrain Control Module (PCM), is responsible for interpreting data from dozens of sensors throughout your vehicle. It uses this information to make real-time adjustments to the fuel injectors, ignition timing, and transmission shift points. When it begins to fail, the signals can become erratic, leading to symptoms that can mimic failures in other, more expensive components. By replacing your failing unit with our pre-programmed module, you are addressing the root cause of these complex electronic issues.
From the Diagnostic Bay
We had a 2009 HHR come in that was driving the owner crazy. It would randomly stall at traffic lights, and the dash would light up with different warning lights each time. The local shop had replaced the alternator and a couple of sensors, but the problem persisted. After hooking up our professional scan tool, we noticed intermittent communication drops with the ECM. A thorough check of the wiring and grounds confirmed they were solid. The culprit was an internally failing ECM. Once we installed a VIN-programmed module like this one and performed the security relearn, the HHR ran perfectly, and all the ghost-like electrical issues vanished. It’s a reminder that the ECM is the central command, and when it fails, it can cause a cascade of confusing symptoms.
Is Your Chevy HHR Experiencing These Symptoms?
- ✔ Check Engine Light is on with multiple, seemingly unrelated codes.
- ✔ Poor engine performance, rough idling, or stalling.
- ✔ Decreased fuel economy for no apparent reason.
- ✔ The vehicle won’t start, but the battery and starter are good.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Unexplained warning lights on the instrument cluster.
Restore Peak Performance with a Programmed 2007-2011 HHR ECM
Don’t let a faulty computer keep your car off the road. This 2007-2011 HHR ECM is the definitive solution for restoring your vehicle’s brainpower. We take the hassle out of the replacement process. Upon purchase, simply provide us with your vehicle’s VIN. Our technicians will then flash the module with the most current GM software specific to your car’s make, model, year, and options. This service ensures compatibility and often resolves issues that were present even from the factory. This module is a direct replacement for service numbers 12597125, 12629020, 12612397, 12594750, 12629019, 12635902, and 12611549, making it a versatile solution for a wide range of GM vehicles including the Cobalt, Malibu, G6, Silverado, and many more. Please verify your service number and consult the fitment list to ensure this is the correct part for your application.
Installation is straightforward for a knowledgeable DIYer or any professional technician. After the physical installation, a ‘Security Relearn’ or ‘Key Relearn’ procedure is typically required to sync the new module with your vehicle’s anti-theft system. This procedure is simple and can usually be done without special tools. Instructions are widely available online or in service manuals.
What is the process after I place my order?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. You can add this in the order notes or send it to us in a message. We cannot program and ship the module without it. Once we have your VIN, we will program the ECM with the latest GM software for your specific vehicle and ship it out to you.
Is this module difficult to install?
The physical installation is generally simple, involving disconnecting the battery and swapping the module. However, after installation, you will need to perform a security relearn procedure (also known as a key relearn or Passlock relearn) to synchronize the new ECM with your vehicle’s anti-theft system. This procedure typically takes 30-40 minutes and does not require a scan tool.
Why is my VIN so important?
Your VIN allows us to load the exact software and calibrations that your vehicle was built with. This includes parameters for the engine, transmission, tire size, gear ratios, and any other specific options. Programming with the VIN ensures the module works seamlessly with your vehicle’s other systems.
Will this part fix my vehicle’s problem?
This ECM will resolve any issues directly caused by a faulty engine computer. However, it’s crucial that your vehicle has been properly diagnosed. This part will not fix problems related to bad sensors, faulty wiring, or other mechanical issues. We always recommend a thorough diagnosis by a qualified technician to confirm the ECM is the point of failure.
Does this fit models other than the Chevy HHR?
Yes, this ECM is compatible with a wide variety of GM vehicles from 2007-2012, including the Chevy Cobalt, Malibu, Impala, GMC Sierra, Pontiac G5/G6, and Saturn Aura/Vue, among others. Please refer to the detailed fitment list on this page to confirm compatibility with your specific year, make, model, and engine size.