Restore Peak Performance to Your Vehicle
Is your 2005-2006 Pontiac Pursuit, Chevrolet Cobalt, or HHR suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or inconsistent shifting? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. A faulty PCM can disrupt everything from fuel delivery and ignition timing to transmission operation, leading to a frustrating and unreliable driving experience. This replacement PCM, service number 12599714, is the definitive solution, engineered to restore your vehicle’s factory performance and reliability.
This isn’t just a generic part off a shelf. We provide a fully plug-and-play solution by programming the module specifically to your vehicle’s Vehicle Identification Number (VIN) before it ships. This critical step ensures that the PCM communicates flawlessly with all other modules in your car, incorporating the latest GM software updates to correct potential factory bugs and optimize performance. You get a direct-fit replacement that works correctly right out of the box, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We recently had a 2006 Chevy Cobalt come into the shop with a classic complaint: intermittent stalling and a check engine light that previous mechanics couldn’t solve. The owner had already replaced the crankshaft position sensor and the ignition coil pack based on generic code readings. However, after a deep dive with our diagnostic tools, we noticed the 5-volt reference signal from the PCM was dropping out intermittently. The sensors were fine; the PCM itself was failing internally and couldn’t provide them with stable power. Installing a VIN-programmed PCM like this one solved the problem instantly. It’s a powerful reminder that symptoms often point back to the central computer.
Common Symptoms of a Failing 2005-2006 Pursuit PCM
- ✔ Persistent Check Engine Light (CEL) with communication error codes (e.g., U0100).
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ Misfire codes that don’t resolve after replacing plugs or coils.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Illumination of other warning lights, like the traction control or ABS light.
Guaranteed Compatibility and Simple Installation
This module is a direct replacement for a range of GM service numbers, ensuring broad compatibility. If your original module has any of the following numbers, this part is the correct fit for you:
Compatible Service Numbers: 12599714, 12589998, 12597329, 12600882, 12600883, 12605766, 12605765
Fitment:
- 2005 Chevrolet Cobalt (with ID 12589998)
- 2005 Pontiac Pursuit (with ID 12589998)
- 2006 Chevrolet HHR (2.2L Engine)
- 2006 Pontiac Pursuit (2.2L Engine)
- 2006 Chevrolet Cobalt (2.2L Engine, VIN F)
The installation process is straightforward for a DIY mechanic or any professional technician. Simply disconnect the battery, locate and unbolt the old PCM in the engine compartment, swap the connectors to the new unit, and bolt it back in. Once you reconnect the battery, your vehicle is ready to go.
Frequently Asked Questions
Do I need to get this PCM programmed by a dealer?
No. The main benefit of our service is that we program the PCM to your vehicle’s specific VIN before we ship it to you. It will arrive ready for installation, with no additional programming required.
What information do you need from me?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). This allows us to load the correct GM-certified software and calibration for your exact vehicle configuration.
Where is the PCM located on my 2005 Pontiac Pursuit?
On the 2005-2006 Pontiac Pursuit and Chevrolet Cobalt, the PCM is located in the engine compartment on the driver’s side (LH side), near the fuse box.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty PCM, this part is the correct fix. However, a check engine light can be triggered by many other components. It’s always best to have a proper diagnosis performed to confirm the PCM is the point of failure.
What is the difference between a PCM, ECM, and ECU?
The terms are often used interchangeably. PCM (Powertrain Control Module) is the most accurate term for modern vehicles as it typically controls both the engine and transmission. ECM (Engine Control Module) and ECU (Engine Control Unit) are older terms that usually refer to a computer that only manages engine functions.