Is your 2005 Chevrolet Cobalt suffering from frustrating and unpredictable engine problems? Issues like stalling, rough idling, poor fuel economy, or a persistent check engine light often point to a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer keep you off the road. This direct-fit PCM, part number 12615197, is the reliable solution to restore your vehicle’s performance and drivability.
The PCM is responsible for managing critical systems, including fuel injection, ignition timing, transmission shifting, and emissions controls. When it begins to fail, it can cause a cascade of confusing symptoms that are often misdiagnosed, leading to wasted time and money on unnecessary parts. By replacing your old module with this professionally programmed unit, you are addressing the root cause of these electronic issues.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is on with various, often unrelated, trouble codes (e.g., U-codes, P0601-P0606).
- ✔ Engine misfires, runs rough, or stalls unexpectedly.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle won’t start, but the battery and starter are good (no-crank or crank-no-start).
- ✔ Intermittent issues that are difficult to replicate, often worse when the engine is warm.
- ✔ Failure to communicate with a diagnostic scan tool.
The Best Solution for Your 2005 Cobalt PCM
Why choose our module? Because we eliminate the guesswork and extra steps. Each PCM is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This process ensures that the module has the correct software and calibrations for your Cobalt’s engine, transmission, and factory options. We load the latest software updates available from GM, which can resolve underlying drivability issues that were present even when the car was new. This means you receive a part that is ready for installation, saving you a trip to the dealership and their expensive programming fees.
This module is a direct replacement for several part numbers, including 12589320, 12579132, and 12615197. Please verify fitment for your specific vehicle below.
Guaranteed Fitment For:
- ✔ Chevrolet Cobalt 2005 (Electronic Control Module; LH front engine compartment, ID 12589320)
- ✔ Chevrolet Malibu 2004-2005 (Electronic Control Module; LH side of dash, VIN Z, 2.2L)
- ✔ Pontiac Pursuit 2005 (Electronic Control Module; LH front engine compartment, ID 12589320)
- ✔ Saturn Ion 2004-2005 (Electronic Control Module; 2.0L Red Line package, opt LSJ)
Frequently Asked Questions
Do I need to have this PCM programmed?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN after purchase, and the module will arrive ready to be installed.
What is a VIN and where do I find it?
The VIN is your vehicle’s unique 17-digit identification number. You can find it on your driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will I need to do anything after installing the new module?
In most cases, you will need to perform a simple security relearn procedure, also known as a Passlock or anti-theft relearn. This procedure can be done without any special tools and typically involves a sequence of turning the key. Instructions are readily available online for your specific model. Some vehicles may also require a Crankshaft Variation (CASE) relearn, which requires a capable scan tool.
How can I be sure my old PCM is the problem?
While the symptoms listed are strong indicators, a definitive diagnosis is best. A professional technician can check for communication with the module, verify power and ground signals, and rule out other potential causes like wiring issues or faulty sensors. Common diagnostic codes for internal PCM failure include P0601, P0602, P0603, P0604, P0605, and P0606.
Is this a new or used part?
This is a high-quality, tested, and verified component that has been restored to full functionality. Each unit is inspected and programmed to meet or exceed original equipment specifications, ensuring reliable performance.