Is Your Chevy HHR Running Rough?
If your 2007-2011 Chevrolet HHR is experiencing frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition, a failing Powertrain Control Module (PCM) could be the culprit. The PCM is the central computer of your vehicle, responsible for managing everything from the engine’s air-fuel mixture and ignition timing to the transmission’s shift points. When it fails, it can cause a wide range of problems that can be difficult to diagnose and leave you stranded.
From the Diagnostic Bay
We once had a 2009 HHR come into the shop with a random misfire code (P0300) that the owner had been chasing for months. He had replaced the spark plugs, ignition coil pack, and even the fuel injectors, but the check engine light always returned. After connecting our diagnostic scanner, we noticed that the fuel trim and ignition timing data were completely erratic. Instead of continuing to replace parts, we inspected the PCM. We found that the module’s internal processor was failing, causing it to send incorrect signals. Installing a correctly programmed PCM solved the problem instantly. It’s a powerful reminder that sometimes the issue lies with the brain, not the body.
Common Symptoms of a Failing HHR PCM
- ✔ Persistent Check Engine Light (CEL) with various fault codes.
- ✔ Engine stalling, stumbling, or misfiring.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass emissions testing.
- ✔ The engine cranks but refuses to start.
- ✔ Communication errors with diagnostic scan tools.
The Plug-and-Play Solution: A Programmed 2007-2011 HHR PCM
Don’t let a faulty computer keep your vehicle off the road. This Powertrain Control Module, service number 12618028, is the definitive solution for your vehicle. We take the guesswork out of the repair by pre-programming the module specifically for your HHR. When you place your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will then flash the unit with the latest official GM software updates that match your exact vehicle configuration. This ensures that the module communicates flawlessly with your engine, transmission, and all other onboard systems right out of the box.
This module is a direct replacement for a wide range of GM vehicles and is compatible with numerous service numbers, including 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549. While this listing focuses on the 2007-2011 HHR PCM, it also fits many other models like the Cobalt, Malibu, G6, Silverado 1500, and more, making it a versatile and reliable component for many GM platforms.
Frequently Asked Questions
Do I need to program this PCM?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for installation with the latest GM software for your specific vehicle.
What is a security relearn procedure?
After installation, you may need to perform a simple security relearn procedure, also known as a key relearn. This syncs the new PCM with your vehicle’s anti-theft system. It typically involves turning the key to the ‘ON’ position for 10-15 minutes and can be done without any special tools. Instructions are readily available online for your specific model.
Where is the PCM located on my 2007-2011 Chevy HHR?
On the Chevrolet HHR, the PCM is typically located in the left-hand (driver’s side) rear of the engine compartment. Always disconnect the battery before attempting to remove or install the module.
How do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my check engine light?
If the check engine light and associated diagnostic trouble codes (DTCs) are being caused by a faulty PCM, then this replacement part will resolve the issue. It is always recommended to have a proper diagnosis performed to confirm the PCM is the point of failure before ordering.