Is Your Truck’s Brain Failing? Restore Peak Performance Today.
If your GM truck or vehicle is suffering from baffling issues like a persistent check engine light, rough idling, stalling, or poor fuel economy, the problem often lies with a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and spark timing to transmission shifting and emissions control. When it starts to fail, it can cause a cascade of frustrating and difficult-to-diagnose problems.
Don’t let a faulty computer keep your powerful truck off the road. This replacement ECM, part number 12633055 (also interchangeable with 12633238), is the definitive solution. We take the guesswork and high dealership costs out of the equation. Before we ship your part, our technicians will program it with the latest official GM software updates, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This ensures a seamless installation and restores your engine’s original factory performance and efficiency.
From the Diagnostic Bay
We recently had a 2011 Sierra 2500 with the 6.0L V8 come in with a complaint of intermittent stalling at stoplights and harsh, unpredictable shifting. The check engine light was on with a generic communication error code. The owner had already replaced multiple sensors without success. After verifying power and ground to the module, we connected our diagnostic tools and found the ECM would periodically drop communication. This pointed to an internal failure. We installed a VIN-programmed ECM, performed the security relearn, and the truck immediately ran like new. These internal failures are common as these modules age, and a pre-programmed replacement is the fastest, most reliable fix.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine misfires, stumbles, or runs rough.
- ✔ Unexplained stalling or difficulty starting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle will not start at all (no-crank or crank-no-start).
- ✔ Failure to pass state emissions testing.
The Direct-Fit Solution: Your 2010 Silverado 3500 ECM
This module is a direct-fit replacement for a wide array of General Motors vehicles, from hardworking trucks like the Silverado and Sierra to performance cars like the Corvette and Camaro. By providing us with your VIN during checkout, you receive a unit that is plug-and-play, ready to be installed without requiring a trip to the dealer for expensive programming. This process ensures all vehicle-specific parameters and security information are correctly loaded, making the installation process as simple as possible for you or your mechanic. This is the most efficient way to solve complex electronic issues and get your vehicle running reliably again.
Upon installation, a simple security relearn procedure may be required, which can often be done without special tools. This ensures the new ECM communicates correctly with your vehicle’s anti-theft system. Restore the power, reliability, and efficiency you depend on with a properly functioning, fully updated engine computer.
Frequently Asked Questions
Do I need to have this ECM programmed?
No. We handle the programming for you before shipment. Simply provide your vehicle’s VIN when you place your order, and the module will arrive ready for installation with the latest GM software.
What is a VIN and where do I find it?
The VIN is your vehicle’s unique 17-digit identification number. You can typically find it on the driver’s side of the 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 else after installing the module?
In most cases, you will need to perform a security relearn procedure (also known as a key relearn or anti-theft relearn). This syncs the new ECM with your vehicle’s existing keys and security system. This procedure can typically be done without special tools and instructions are readily available online for your specific model. A Crankshaft Variation (CASE) relearn may also be needed, which requires a capable scan tool.
How do I know for sure that my old ECM is the problem?
While the symptoms listed are strong indicators, it’s always best to have a proper diagnosis performed by a qualified mechanic. They can rule out other potential issues like bad wiring, faulty sensors, or fuel delivery problems before you replace the ECM.
Is this compatible with other part numbers?
Yes, this ECM is a direct replacement for part numbers 12633055 and 12633238. It fits a very wide range of GM vehicles, including various years of the Silverado, Sierra, Tahoe, Yukon, Camaro, Corvette, and Express/Savana vans. Please check the detailed fitment list to confirm compatibility.