Restore Peak Performance to Your GM Truck or Car
Is your vehicle suffering from frustrating issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your engine’s most critical functions. Don’t let a faulty module keep your powerful truck or performance car sidelined. This direct-fit replacement ECM, part number 12633238, is the definitive solution to get your vehicle running reliably again.
This isn’t just a generic part off a shelf. We provide a comprehensive service that makes your repair process as smooth as possible. Upon purchase, you will provide us with your vehicle’s VIN. Our technicians will then program the module with the latest, most stable software updates directly from GM. This VIN-specific flashing ensures that the ECM communicates perfectly with your vehicle’s existing systems, including the engine, transmission, and security features, right out of the box. This critical step eliminates the need for an expensive trip to the dealership for programming, saving you both time and money.
From the Diagnostic Bay
We had a 2010 Sierra 2500 with the 6.0L come in that was driving the owner crazy. It had a random misfire that would come and go, and the transmission would occasionally shift hard into second gear. The previous shop had replaced two ignition coils and the mass airflow sensor, but the problem persisted. After hooking up our professional scan tool and monitoring live data, we noticed the short-term fuel trim values were jumping erratically, but only intermittently. All sensor inputs looked good. This pointed us toward the processor itself. We installed one of our VIN-programmed ECMs, performed the security relearn, and the truck ran perfectly. The owner was thrilled to finally have a reliable workhorse again after chasing ghosts for weeks.
Why Choose Our Programmed 2010 Sierra 3500 ECM?
The Engine Control Module is the brain of your vehicle’s powertrain. It makes thousands of calculations per second to control the fuel injectors, ignition timing, camshaft position, and emission systems. When it fails, the symptoms can be widespread and difficult to diagnose. By choosing our pre-programmed module, you are not just buying a part; you are getting a complete, ready-to-install solution. This module is meticulously inspected and tested to ensure it meets or exceeds original equipment specifications for performance and longevity. It is a reliable replacement for original part numbers 12633238 and 12633055, and fits a wide range of GM vehicles, as detailed in our fitment list.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or running rough.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Loss of power and poor acceleration.
- ✔ Communication errors with diagnostic scan tools.
Replacing your faulty module with our professionally programmed 2010 Sierra 3500 ECM is the most effective way to resolve these issues and restore the factory performance and reliability you depend on. The installation process is straightforward for a competent DIY mechanic or any professional technician. After installation, a simple security relearn procedure may be required, which can often be done without special tools. Get back on the road with confidence by ordering today.
Frequently Asked Questions
Is this ECM ready to install right out of the box?
Yes, this ECM comes programmed to the specific VIN you provide after your purchase. This ensures it communicates correctly with your vehicle’s systems. In some cases, a simple security or anti-theft relearn procedure is required after installation, which can typically be done without a scan tool.
How do I provide my vehicle’s VIN?
After you complete your purchase, we will contact you for your 17-digit Vehicle Identification Number (VIN). Our technicians need this to load the correct GM-certified software for your specific engine, transmission, and options.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM, then this replacement part will solve the problem. It is crucial to have a proper diagnosis performed to confirm the ECM is the point of failure and not a separate sensor or wiring issue.
What is the difference between an ECM, ECU, and PCM?
The terms are often used interchangeably. ECM (Engine Control Module) and ECU (Engine Control Unit) typically refer to the same component. PCM (Powertrain Control Module) is a module that controls both the engine and the transmission functions in one unit. For this application, it is the main engine computer.
Does this part fit vehicles other than the 2010 Sierra 3500?
Absolutely. This ECM is compatible with a wide array of GM cars, trucks, and vans from roughly 2010 to 2017, including models like the Silverado, Tahoe, Suburban, Escalade, Camaro, and Express/Savana vans. Please review the detailed fitment list on this page to confirm compatibility with your exact vehicle.