Restore Peak Performance to Your Chevrolet or Pontiac
Is your 2005-2006 Chevrolet Cobalt, HHR, or Pontiac Pursuit suffering from mysterious engine problems? A faulty Engine Control Module (ECM), also known as a Powertrain Control Module (PCM), is often the hidden culprit behind issues that can sideline your vehicle. This replacement ECM, service number 12599714, is the definitive solution, providing a reliable, pre-programmed component that restores your vehicle’s factory operation. As the central computer for your engine, the ECM governs critical functions like fuel mixture, ignition timing, and emissions control. When it fails, the symptoms can range from annoying to debilitating. This unit is a direct replacement for your original part, ensuring a perfect fit and restored functionality.
From the Diagnostic Bay
We recently had a 2006 Chevy HHR towed in with a classic ‘crank-no-start’ condition. The owner had already replaced the battery and checked the fuel pump. Our initial scan showed no communication with the engine computer. After confirming the module had proper power and ground connections, we knew the internal circuitry had failed. We installed one of our VIN-programmed ECMs, performed the simple 10-minute security relearn procedure, and the 2.2L Ecotec engine fired up on the first try. It’s a common failure on these platforms that can often be misdiagnosed, costing owners time and money on unnecessary parts.
Is Your Vehicle Showing Signs of ECM Failure?
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following symptoms, a faulty ECM could be to blame:
- ✔ Check Engine Light is on with communication error codes (e.g., U-codes).
- ✔ Engine cranks but refuses to start.
- ✔ Rough or erratic idling and frequent stalling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Failure to pass an emissions test.
- ✔ Seemingly random electrical issues or warning lights.
Why You Need a Reliable 2005-2006 Cobalt ECM
Don’t settle for a generic, unprogrammed module from a junkyard that will not work in your vehicle. Our process ensures you receive a fully functional component tailored specifically for your car. We take your vehicle’s Vehicle Identification Number (VIN) and program the module with the latest, most stable software updates directly from GM. This not only matches the unit to your car’s specific options and calibration but can also resolve underlying software bugs that may have existed from the factory. This attention to detail makes installation straightforward, getting you back on the road faster. This is the most effective way to replace the brain of your vehicle’s powertrain.
Plug-and-Play Installation
This 2005-2006 Cobalt ECM is designed for a simple, direct-fit installation. Once you receive the module, you simply disconnect the battery, remove the old unit, and install the new one. After reconnecting the battery, you will likely need to perform a security relearn procedure (often called a ‘key relearn’), which pairs the new ECM to your vehicle’s anti-theft system. This process typically takes about 10-15 minutes and can be done in your driveway without any special tools. Instructions are widely available online or in your vehicle’s service manual.
Guaranteed Compatibility
This module is a direct replacement for several service numbers, ensuring broad compatibility. It fits the following vehicles:
- 2005 Chevrolet Cobalt: Electronic Control Module; (LH front engine compartment), ID 12589998
- 2006 Chevrolet Cobalt: Electronic Control Module; (LH front engine compartment), 2.2L (VIN F, 8th digit)
- 2006 Chevrolet HHR: Electronic Control Module; (LH rear engine compartment), 2.2L
- 2005 Pontiac Pursuit: Electronic Control Module; (LH front engine compartment), ID 12589998
- 2006 Pontiac Pursuit: Electronic Control Module; (LH front engine compartment), 2.2L
This part replaces the following service numbers: 12599714, 12589998, 12597329, 12600882, 12600883, 12605766, 12605765. By ordering this pre-programmed 2005-2006 Cobalt ECM, you are getting a reliable part that is ready to solve your vehicle’s issues.
Frequently Asked Questions
What is an ECM and what does it do?
The Engine Control Module (ECM) is your vehicle’s main computer. It controls the performance of the engine by managing the fuel injectors, spark plugs, and emissions systems to ensure optimal power, fuel efficiency, and low emissions.
Is this ECM ready to install when it arrives?
Yes! This ECM is programmed to the specific VIN you provide at checkout. It arrives ready to be installed. In most cases, you will only need to perform a simple security relearn procedure after installation, which does not require a mechanic or special tools.
Where is the ECM located on my 2005 Cobalt?
On the 2005-2006 Chevrolet Cobalt and Pontiac Pursuit, the ECM is located in the engine compartment on the driver’s side (LH side), near the fuse box. On a 2006 Chevrolet HHR, it’s located in the left-hand rear of the engine compartment.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add this in the notes section during checkout or reply to your order confirmation email. We cannot ship your part until we receive the VIN.
Will this part fix my car’s problem for sure?
This module will correct any issues directly caused by a failing ECM. While the symptoms listed are very common for ECM failure, they can sometimes be caused by other faulty sensors or wiring. Proper vehicle diagnosis is always recommended to ensure you are replacing the correct part.