Is Your Chevrolet HHR Running Rough?
If your 2007-2011 Chevrolet HHR is experiencing frustrating issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition, a failing Powertrain Control Module (PCM) is a very likely culprit. The PCM 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, often leading to costly and unnecessary repairs.
The Direct Solution for Your Vehicle’s Brain
This replacement Powertrain Control Module, compatible with service number 12611549, is the definitive solution to restore your vehicle’s performance and reliability. We take the guesswork out of the repair process. Unlike a generic module from a parts store or salvage yard, this unit is specifically programmed for your vehicle using your unique Vehicle Identification Number (VIN). We flash it with the latest, most stable software updates directly from General Motors, ensuring optimal engine performance, fuel efficiency, and emissions compliance right out of the box.
From the Diagnostic Bay
We had a 2009 HHR come into the shop with a complaint of intermittent stalling and a check engine light that previous mechanics couldn’t solve. They had already replaced the spark plugs, ignition coils, and even the fuel pump. After hooking up our scanner, we saw erratic data from multiple sensors, but the sensors themselves tested fine. This pointed us directly to the PCM. Instead of just swapping it, we installed one of our pre-programmed units. The car started immediately, the check engine light was gone, and all sensor data stabilized. The customer was thrilled to finally have a reliable car again after weeks of chasing the wrong parts.
Common Symptoms of a Failing 2007-2011 HHR PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off while driving.
- ✔ Rough idling or misfires.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions or smog test.
- ✔ The engine cranks but will not start.
- ✔ Communication errors with diagnostic scan tools.
Plug-and-Play Installation with Your VIN
Our process is designed for simplicity and success. After you place your order, simply provide us with your vehicle’s VIN. Our technicians will then program the module to match your car’s exact specifications, including engine size, transmission type, and any specific options. This ensures a seamless installation process. While the module is programmed for your vehicle, you may need to perform a simple security relearn procedure (often called a CASE relearn or anti-theft relearn) after installation, which can typically be done without special tools. This synchronizes the new PCM with your vehicle’s anti-theft system.
Broad GM Compatibility
While this is a perfect solution for the 2007-2011 HHR PCM, this versatile E37 controller fits a wide range of other General Motors vehicles. It is a direct replacement for multiple service numbers, including 12597125, 12612397, 12594750, 12629019, 12635902, and others. This module is found in popular models such as the Chevrolet Cobalt, Malibu, Silverado 1500, Pontiac G6, Saturn Aura, and more. Please verify the service number on your original module or check the fitment list to ensure compatibility.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Yes. While the module is programmed to your VIN, you will need to perform a security relearn procedure. This is a simple process that pairs the new computer to your vehicle’s anti-theft system and can usually be done in your driveway. Instructions are widely available online for your specific model.
How do I provide my VIN number?
After you complete your purchase, you can send us a message with your 17-digit VIN. We cannot program and ship your module until we receive this information.
Is this a new or used part?
This is a high-quality, fully tested replacement part. Each unit undergoes a rigorous inspection and programming process to ensure it meets or exceeds original factory specifications.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, this part will resolve the issue. However, it’s crucial to ensure your vehicle’s underlying mechanical or electrical problems (like a bad sensor) have been addressed first, as the PCM can only function with good inputs.
What if I have a different service number on my computer?
This module replaces several service numbers, including 12597125, 12612397, 12594750, and more. As long as your original service number is on our compatibility list, this part will work for your vehicle.