Restore Peak Performance to Your General Motors Vehicle
Is your Chevrolet Malibu, Cobalt, or GMC Sierra running rough, stalling unexpectedly, or displaying a persistent Check Engine Light? These are common indicators of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle’s engine. A faulty PCM can lead to a cascade of issues, including poor fuel economy, failed emissions tests, and even a no-start condition. This replacement PCM, service number 12612397, is the definitive solution to restore your vehicle’s factory performance, drivability, and reliability.
This isn’t just a part in a box. We provide a comprehensive service that makes your repair process as simple as possible. Upon purchase, you will provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then program the module with the latest, most stable software updates directly from GM. This ensures that the PCM is perfectly matched to your vehicle’s specific configuration, including its engine, transmission, and factory options. This critical programming step eliminates the need for an expensive trip to the dealership for software flashing.
From the Diagnostic Bay
We had a 2011 Chevy Malibu come into the shop with a bizarre set of symptoms. The customer complained of intermittent stalling at stoplights, a wildly fluctuating tachometer, and the transmission occasionally getting stuck in a single gear. The check engine light was on, but the codes were all over the place—from O2 sensor faults to transmission communication errors. After hours of chasing electrical gremlins and testing sensors, we finally focused on the PCM. A bench test confirmed our suspicions: the processor was failing intermittently. We installed one of our VIN-programmed PCMs, performed the quick security relearn procedure, and the car ran like it just rolled off the assembly line. It’s a classic case of the central computer causing widespread, confusing symptoms that can fool even experienced technicians.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various engine or communication codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass state emissions inspections.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our Programmed 2007-2012 Malibu PCM?
This module is a direct-fit replacement for a wide range of GM vehicles, not just the Malibu. It is a reliable and cost-effective alternative to sourcing a new part from a dealership. By having the unit pre-programmed to your VIN, you are receiving a component that is ready for installation right out of the box. While many vehicles will allow for a simple plug-and-play installation, please be aware that some GM security systems may require a brief “Security Relearn” or “CASE Relearn” procedure, which can often be performed by a qualified mechanic with a professional-grade scan tool. This procedure syncs the new PCM with your vehicle’s existing anti-theft and crankshaft position sensor systems.
This unit is a direct replacement for multiple service numbers, including: 12612397, 12594750, 12597125, 12629019, 12635902, and 12611549. Please verify that your original module carries one of these service numbers to ensure compatibility. Restoring your vehicle’s core electronic system is a critical repair, and our VIN-specific programming for your 2007-2012 Malibu PCM ensures it’s done correctly the first time.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is a powerful computer that controls all aspects of your vehicle’s engine and transmission. It reads data from dozens of sensors to manage fuel injection, ignition timing, emissions systems, and transmission shift points to ensure optimal performance, fuel economy, and low emissions.
Do I need to program this module?
No. We handle the programming for you before shipment. You must provide your vehicle’s VIN at checkout or via message so we can load the correct GM-certified software for your specific car or truck. This makes installation much simpler.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on the vehicle itself. Look for a small metal plate on the driver’s side of the dashboard visible through the windshield, or on the sticker inside the driver’s side door jamb.
What is a “Security Relearn” and will I need to do one?
A Security Relearn procedure syncs the new PCM with your vehicle’s anti-theft system (Passlock/Passkey). On many GM vehicles, if this is not performed, the engine may start and then immediately stall. The procedure can often be done without special tools, but sometimes requires a scan tool. We recommend consulting a service manual for your specific vehicle or contacting a professional mechanic.
Is this compatible with part number 12597125?
Yes. This PCM, service number 12612397, is a fully compatible and updated replacement for several older service numbers, including 12597125, 12594750, 12629019, and others listed in the description. It will function identically once programmed for your vehicle.