Restore Your Vehicle’s Brain and Bring Back That Smooth, Reliable Drive
Is your Chevrolet HHR, Cobalt, or Malibu acting erratically? Stalling at stoplights, suffering from poor fuel mileage, or displaying a stubborn Check Engine Light can be incredibly frustrating. These aren’t just annoyances; they’re signs that your vehicle’s central command center—the Powertrain Control Module (PCM)—may be failing. This isn’t just a part; it’s the brain of your engine. When it falters, the entire system suffers. Take back control and restore the performance and peace of mind you deserve with this professionally programmed, direct-fit PCM.
We take the guesswork and high dealership costs out of the equation. Each module is meticulously programmed with the latest GM software updates specifically for your vehicle’s VIN. This means no extra trips to a mechanic for expensive flashing. It arrives at your doorstep ready for a straightforward installation, allowing you to get back on the road quickly and confidently. This is the definitive solution for a lasting repair.
Warning Signs Your PCM Needs Attention
- ✔ Persistent Check Engine Light with diagnostic trouble codes (DTCs) like P0601, P0602, P0606, or U0100.
- ✔ Unexplained engine stalling, hesitation, or rough idling.
- ✔ A noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ The vehicle fails to start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
Expert Diagnostic Tip
Before condemning the PCM, always verify the integrity of your vehicle’s battery, grounds, and wiring harness. A corroded ground wire or a weak battery can mimic PCM failure symptoms. A simple voltage check and visual inspection can save you time and ensure you’re replacing the right part the first time. A solid foundation is key to any electronic component’s longevity.
Guided Installation for Your HHR PCM Replacement
Replacing the PCM is a manageable task for a confident DIYer. Follow these steps carefully for a successful installation and get back to a worry-free drive.
- Safety First: Disconnect the Battery. Before touching any electronic components, always disconnect the negative terminal of your vehicle’s battery to prevent electrical shorts.
- Locate the Old PCM. On most HHR models, the PCM is found in the engine compartment, on the driver’s side, near the rear. It’s a silver box with multiple large electrical connectors.
- Carefully Disconnect and Remove. Gently release the locking tabs on the electrical connectors and pull them straight out. Then, unbolt the module from its mounting bracket. Avoid forcing any connections.
- Install the New Module. Mount your new, pre-programmed PCM onto the bracket and securely re-attach the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery. Re-attach the negative battery terminal and tighten it securely.
- Perform the Security Relearn Procedure. This is a critical final step that syncs the new PCM with your vehicle’s anti-theft system. The procedure typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. Consult your owner’s manual for the exact steps for your model.
Verified Compatibility for Your Vehicle
This module is a direct replacement for service numbers 12597125, 12612397, 126140, 12594750, 12629019, 12635902, and 12611549. It is guaranteed to fit and function in the following vehicles:
Important: After purchase, please provide your vehicle’s 17-digit VIN to ensure we program the module perfectly for your specific make, model, and options.
Frequently Asked Questions
Do I need to get this computer programmed by a dealer?
No. We handle all the programming for you before shipment. This module will arrive flashed with the latest GM software updates tailored to your specific VIN, making it a true plug-and-drive solution.
What is the security relearn procedure and why is it necessary?
The security relearn, or anti-theft relearn, syncs the new PCM with your vehicle’s existing keys and security system. Without this step, the vehicle will not start. It’s a simple procedure that you can do yourself in about 30 minutes with just your car key.
Where is the PCM located on a 2009 Chevy HHR?
On the 2007-2011 Chevrolet HHR, the Powertrain Control Module (PCM) is typically located in the left-hand (driver’s side) rear of the engine compartment, near the firewall.
Will this HHR PCM Replacement fix my check engine light?
If the check engine light is caused by an internal failure of the old PCM (indicated by codes like P0601), then yes, this part is the correct fix. However, if the light is on for other reasons (like a faulty sensor), those issues will need to be addressed separately.
How quickly will you ship my part after I provide my VIN?
We pride ourselves on fast service. Once you provide your VIN after purchase, we typically program and ship the module within one business day so you can get your vehicle repaired as soon as possible.