Is Your GM Truck, Van, or SUV Running Poorly?
A failing Engine Control Module (ECM) can be the source of some of the most frustrating and difficult-to-diagnose vehicle problems. If you’re dealing with a persistent check engine light, unexplained stalling, rough idling, or a no-start condition, the brain of your engine might be the culprit. This vital component manages everything from fuel injection and ignition timing to emissions controls. When it fails, your vehicle’s performance and reliability suffer dramatically. Don’t let a faulty computer keep you off the road. We offer a dependable and straightforward solution.
From the Diagnostic Bay
We recently had a 2009 Silverado 2500 in the shop with a laundry list of confusing symptoms. The owner reported random stalling at stoplights and a check engine light that would come and go. Our scan tool pulled codes for a misfire on cylinder 3, an O2 sensor heater circuit, and a P0606 (ECM Processor Fault). After verifying the wiring and sensors were good, we knew the ECM was internally faulted. Instead of a costly trip to the dealership for a new unit and programming, we installed a pre-programmed module just like this one. After a quick security relearn, the truck was running perfectly, all codes were gone, and the customer was back to work. This is the exact solution for that kind of problem.
Why Choose Our Programmed ECM 12625455?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealer expense out of the equation. When you order, you provide us with your vehicle’s VIN. Our technicians then flash the module with the latest, most stable GM-certified software specific to your exact vehicle configuration. This ensures that all factory parameters for your engine, transmission, and emissions systems are correctly loaded. The module arrives at your door ready for a simple installation, getting you back on the road faster and with less hassle.
Common Symptoms of a Failing GM Engine Computer
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine misfires, stumbles, or stalls unexpectedly.
- ✔ Vehicle cranks but refuses to start.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Poor engine performance and hesitation during acceleration.
- ✔ Inability to communicate with the ECM using a diagnostic scan tool.
- ✔ Erratic automatic transmission shifting behavior.
This Programmed ECM 12625455 is a direct replacement for a wide range of popular 2009 and 2010 General Motors vehicles, including the Chevrolet Silverado, Express, Suburban, Tahoe, and the GMC Sierra, Savana, and Yukon, among many others. It is also compatible with alternate part number 12629009. Please verify your part number and consult the detailed fitment list to ensure compatibility with your specific model and engine option.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before the part is shipped to you. The module is flashed with the latest GM software using your vehicle’s VIN. In most cases, you will only need to perform a simple security relearn procedure (often called a key relearn or anti-theft relearn), which can typically be done without special tools and takes about 30 minutes.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module until we receive this information.
Is this a plug-and-play part?
It’s very close. Because it’s pre-programmed, it eliminates the need for expensive dealer tools. You will need to install the part and then perform the security relearn procedure for your vehicle to recognize the new module and start. Instructions for this procedure are widely available online for your specific model.
What is the difference between an ECM, ECU, and PCM?
These terms are often used interchangeably. ECM stands for Engine Control Module. ECU is a more generic term for Electronic Control Unit. PCM, or Powertrain Control Module, typically controls both the engine and the transmission. For this application, the part functions as the primary engine computer.
How can I be sure this Programmed ECM 12625455 will fit my vehicle?
The best way is to match the part number (12625455 or 12629009) from your original module. You can also use the detailed fitment list provided on this page to confirm compatibility with your vehicle’s year, make, model, and engine size.