Restore Your HHR’s Performance and Reliability
Is your Chevrolet HHR running rough, stalling unexpectedly, or displaying a persistent check engine light? These frustrating issues often point to a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. This replacement PCM, part number 12597125, is the definitive solution to get your vehicle back to factory-spec performance. We take the guesswork out of the repair by professionally programming the module to your vehicle’s specific VIN. This means it arrives at your door ready for a straightforward installation, eliminating the need for expensive dealership programming or specialized tools. Regain the smooth, responsive, and reliable drive you depend on.
Warning Signs and How to Overcome Them
A failing engine computer can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following, this module is your solution:
- ✔ Unexplained Check Engine Light with codes like P0601, P0606, or U0100.
- ✔ Rough idling, engine stumbling, or hesitation during acceleration.
- ✔ A sudden and significant drop in fuel economy.
- ✔ Intermittent stalling or complete failure to start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
An Expert’s Story: The HHR That Wouldn’t Communicate
“A customer brought in an ’09 HHR that had been to two other shops. It would crank but never start, and no scan tool could communicate with the PCM. They had already replaced the fuel pump and crank sensor. We suspected the computer was internally shorted. After confirming power and ground to the module were good, we installed one of our pre-programmed units. The moment we connected the battery, the dash lit up normally. The engine fired on the first crank and ran perfectly smooth. It wasn’t a complex mechanical issue; it was a digital roadblock. Providing a VIN-programmed module saved the customer hundreds in diagnostic fees and got them back on the road with confidence.”
Effortless Steps for a Confident Fix
Installing your pre-programmed 2007-2011 HHR PCM is a manageable job for a DIY enthusiast. Follow these general steps for a successful replacement:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On the HHR, the PCM is typically found in the left (driver’s side) rear of the engine compartment.
- Disconnect Connectors: Carefully release the locking tabs and unplug the electrical harnesses from the old PCM. Avoid forcing them.
- Remove the Old Unit: Unbolt the old module from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock in place.
- Reconnect Battery: Re-attach the negative battery terminal. The vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes.
- Start and Verify: Start the engine and let it idle. Check for a smooth idle and ensure the check engine light is off. Your repair is complete!
Tailored Fit for Your Ride
This module is a direct-fit replacement for a wide range of General Motors vehicles. Please verify your service number (found on the original module’s sticker) matches one of the following: 12612397, 216140, 12594750, 12597125, 12629019, 12635902, or 12611549. While this is the correct 2007-2011 HHR PCM, it also fits:
- Buick Lucerne: 2009-2011 (3.9L)
- Chevrolet Cobalt: 2007-2010
- Chevrolet Express/GMC Savana 1500: 2008-2009 (4.3L)
- Chevrolet Impala: 2010-2011
- Chevrolet Malibu: 2007-2012
- Chevrolet Silverado/GMC Sierra 1500: 2007-2009 (4.3L)
- Pontiac G5/G6: 2007-2010
- Pontiac Solstice/Saturn Sky: 2008-2010 (2.4L)
- Saturn Aura: 2008-2009 (2.4L)
- Saturn Vue: 2008-2010 (2.4L)
IMPORTANT: After purchase, please send us your vehicle’s 17-digit VIN. This is essential for us to program the module with the latest GM software updates specific to your car, ensuring perfect function and compatibility.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Because we program the module to your VIN, it is ready for installation. In most cases, you will only need to perform a simple security relearn procedure, which involves leaving the key in the ‘ON’ position for about 10-15 minutes before starting. No expensive scan tools are required.
What is a VIN-programmed module?
A VIN-programmed module means we flash the computer with the specific software and calibrations for your vehicle’s exact make, model, year, and options. This ensures all systems, from the engine to the transmission and anti-theft, work together correctly, just as they did from the factory.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine and transmission functions. If the module is failing, it can send incorrect signals to the transmission, causing harsh or erratic shifting. A new, properly functioning PCM often resolves these communication-based shifting issues.
Is this a guaranteed fix for my check engine light?
This module will resolve any issues and check engine light codes directly caused by a faulty computer (like P0601-P0606). However, if the light is on due to a separate failed sensor or mechanical part, that component will still need to be addressed.
How do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.