Is Your 2006 HHR Running Rough or Stalling?
If you’re dealing with frustrating engine issues like a persistent check engine light, poor fuel economy, or unpredictable stalling, the root cause is often a failing Powertrain Control Module (PCM). The PCM is the central computer of your 2006 Chevrolet HHR, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it starts to fail, it can create a cascade of problems that are difficult to diagnose and can leave you stranded. Don’t let a faulty computer dictate your vehicle’s reliability. This direct-replacement PCM, part number 12599714, is the definitive solution to restore your vehicle’s performance and peace of mind.
Expert Pro Tip
Before condemning your PCM, always perform a thorough check of the vehicle’s battery, charging system, and all main power and ground connections to the module. A corroded ground wire or a weak battery can mimic PCM failure symptoms. Use a multimeter to verify you have a stable 12V+ supply and a clean, solid ground path at the PCM connectors. This simple step can save you from replacing a perfectly good module.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ The engine cranks but refuses to start (no-start condition).
- ✔ Communication errors with diagnostic scan tools.
- ✔ Misfire codes that don’t resolve with new spark plugs or coils.
The Perfect Solution: A Programmed 2006 HHR PCM
Replacing the PCM on modern vehicles isn’t as simple as swapping a part. The module contains vehicle-specific information, including the Vehicle Identification Number (VIN) and anti-theft system data. This unit eliminates the need for expensive dealership programming or specialized tools. We professionally flash this module with the latest, most stable software updates directly from GM, tailored specifically to your vehicle’s VIN. This ensures seamless integration and optimal performance right out of the box. When you provide us with your VIN during checkout, you receive a component that is truly plug-and-play, getting you back on the road faster and with less hassle.
Installation and Setup
While professional installation is always recommended, replacing the PCM is a manageable task for a skilled DIY mechanic. On the 2006 HHR, the PCM is located in the left-hand (driver’s side) rear of the engine compartment. The general process involves disconnecting the vehicle’s battery, carefully releasing the locking tabs on the electrical connectors, unbolting the old module, and installing the new one in its place. After installation, you may need to perform a simple security relearn procedure (often called a ‘key-cycle relearn’) to sync the new PCM with your vehicle’s anti-theft system. This procedure can typically be done without special tools and instructions are widely available.
Guaranteed Compatibility
This Electronic Control Module is a direct replacement for several service numbers, ensuring a perfect fit for your vehicle. It is compatible with the original part number 12599714 and interchangeable with the following service numbers: 12589998, 12597329, 12600882, 12600883, 12605766, and 12605765.
This part is confirmed to fit:
- 2006 Chevrolet HHR (Electronic Control Module; LH rear engine compartment, 2.2L)
- 2005-2006 Chevrolet Cobalt (Electronic Control Module; LH front engine compartment, 2.2L)
- 2005-2006 Pontiac Pursuit (Electronic Control Module; LH front engine compartment, 2.2L)
Frequently Asked Questions
Do I need to get this PCM programmed?
No. This is the primary benefit of our service. We program the module with the latest GM software using the VIN you provide during your purchase. It will arrive at your door ready for installation, saving you a trip to the dealership.
Where is the PCM located on my 2006 HHR?
The PCM is located in the engine compartment on the driver’s side, towards the rear firewall. It’s a silver metal box with multiple large electrical connectors.
What is a security relearn procedure?
A security relearn, or key-cycle relearn, is a simple procedure that synchronizes the new PCM with your car’s existing anti-theft system and keys. It usually involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating this cycle three times. This allows the components to communicate and authorize the new module.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s crucial to ensure other potential causes (like faulty sensors or wiring) have been ruled out first for a complete and lasting repair.
Is this a new or used part?
This is a high-quality, tested, and inspected original equipment part that has been professionally programmed to function as new for your specific vehicle. It provides the reliability of an OE component without the high cost of a brand new unit from a dealer.