Restore Your Vehicle’s Heartbeat and Drive with Renewed Confidence
Is your daily drive plagued by a persistent Check Engine light, unpredictable stalling, or a frustrating no-start condition? These aren’t just annoyances; they’re signals from your vehicle’s brain—the Powertrain Control Module (PCM)—that something is critically wrong. Don’t let a faulty computer dictate your day or compromise your safety. This direct-fit Engine Control Module, service number 12597125, is the definitive solution to restore your vehicle’s performance, efficiency, and reliability, arriving at your doorstep fully programmed to your specific Vehicle Identification Number (VIN).
Warning Signs Your Engine Computer Needs Attention
A failing PCM can manifest in confusing ways. If you’re experiencing any of the following, it’s time to stop guessing and start solving the problem. This module is engineered to resolve these exact issues:
- ✔ Persistent Check Engine Light: Especially with internal module error codes like P0601, P0606, or U0100.
- ✔ Engine Stalling or Misfiring: Unpredictable engine behavior that makes driving stressful and unsafe.
- ✔ No-Start Condition: The engine cranks but refuses to start, often due to a lack of fuel or spark command from the PCM.
- ✔ Poor Fuel Economy: A sudden, unexplained drop in MPG as the computer fails to manage the engine efficiently.
- ✔ Erratic Transmission Shifting: Harsh or delayed shifts as communication between the engine and transmission breaks down.
- ✔ Failed Emissions Test: Inability to pass smog inspections due to computer-related faults.
A Word From a Seasoned Technician
“I once had a customer with a Chevy Malibu who had replaced nearly every sensor on the engine chasing a ghost. The car would run fine for a day, then stall at the worst possible moments. The issue wasn’t a bad sensor; it was a failing PCM giving faulty commands. We installed a VIN-programmed module just like this one, and it was like flipping a switch. The car ran perfectly. Getting a module pre-programmed to the VIN isn’t just a convenience—it’s the difference between a quick, successful repair and weeks of frustration.”
Your Straightforward Path to a Smooth-Running Engine
We’ve eliminated the most complex part of the repair: the programming. By flashing the module with the latest GM software updates using your VIN, we deliver a component that is truly ready for installation. Follow these simple steps to get back on the road.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Old Module: Find your current PCM. Its location varies by model (e.g., under the battery tray on a Silverado, in the LH rear engine compartment on an HHR).
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed module in the same location. Securely reconnect the wiring harnesses, ensuring the locking tabs click into place.
- Reconnect the Battery: Reattach the negative battery terminal and tighten it.
- Perform Security Relearn: Your vehicle may require a simple security relearn procedure (often called CASE or Passlock/VATS) to sync the new PCM with your keys. This typically takes 10-30 minutes and can be done without special tools. We include clear instructions to guide you.
Guaranteed Compatibility for Your GM Vehicle
This module is a direct replacement for service number 12597125 and is compatible with a wide range of General Motors vehicles. Please verify your model and engine below to ensure a perfect match. This is the correct Programmed HHR PCM for 2.2L and 2.4L models, as well as many others:
- Buick: Lucerne (2009-2011, 3.9L)
- Chevrolet: Cobalt (2007-2010), Express 1500 Van (2008-2009, 4.3L), HHR (2007-2011, 2.2L/2.4L), Impala (2010-2011), Malibu (2007-2012), Silverado 1500 (2007-2009, 4.3L)
- GMC: Savana 1500 Van (2008-2009, 4.3L), Sierra 1500 (2007-2009, 4.3L)
- Pontiac: G5 (2007-2010), G6 (2008-2010), Solstice (2008-2010, 2.4L)
- Saturn: Aura (2008-2009, 2.4L), Sky (2008-2010, 2.4L), Vue (2008-2010, 2.4L)
This part directly interchanges with the following service numbers: 12612397, 12594750, 12629019, 12635902, and 12611549.
Frequently Asked Questions
Do I need to do anything after I purchase?
Yes. After you complete your purchase, you MUST provide us with your vehicle’s 17-digit VIN. We cannot program and ship your module without it. This ensures the unit is a perfect match for your vehicle’s specific systems.
Is this a simple plug-and-play installation?
Almost. Because the module is pre-programmed to your VIN, it eliminates the need for expensive dealer tools. However, most GM vehicles require a security relearn procedure to recognize the new module. This is a simple process you can do yourself in about 30 minutes with just your car key. Instructions are provided.
Will this fix my specific problem?
This Programmed HHR PCM is a common solution for a wide range of engine performance issues, including stalling, misfires, and various diagnostic trouble codes. While it resolves the vast majority of computer-related faults, we always recommend proper vehicle diagnosis to confirm the PCM is the root cause of your issue.
What if I have aftermarket modifications?
This module is programmed with the latest stock GM calibration for your VIN. It is designed for vehicles with original factory equipment and is not intended for vehicles with significant performance modifications.
Is there a core charge?
This listing does not require you to send back your old module, so there is no core charge. You can dispose of your old part responsibly.