Restore the peak performance and reliability of your truck with this direct-fit Engine Control Module (ECM), part number 12633238. As the central computer for your vehicle’s engine, a fully functional ECM is critical for managing everything from fuel mixture and ignition timing to transmission shifts and emissions. If your vehicle is suffering from unexplained running issues, a failing computer is a likely cause. This module is the definitive solution, arriving pre-programmed to your specific Vehicle Identification Number (VIN) with the latest factory software updates from GM.
From the Diagnostic Bay
We had a 2011 Silverado 1500 in the shop that was driving the owner crazy. It had an intermittent stalling issue and a persistent check engine light with codes for multiple unrelated sensors. The owner had already replaced the throttle body and a couple of O2 sensors with no luck. After hooking up our diagnostic tools, we noticed the live data from the ECM was erratic. The 5-volt reference signal was dropping out intermittently, causing the sensors to give false readings. Instead of chasing more phantom sensor issues, we identified the root cause: an internal failure in the original ECM. We installed a VIN-programmed unit just like this one, performed the quick security relearn, and the truck ran perfectly. It’s a classic case of how a faulty computer can send you on an expensive wild goose chase for parts you don’t need.
Is Your Truck Showing Signs of ECM Failure?
A failing engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, it might be time to replace your 2010-2013 Avalanche 1500 ECM:
- ✔ Persistent Check Engine Light that won’t clear or returns immediately.
- ✔ Unexplained drop in fuel economy.
- ✔ Engine misfires, stumbles, or runs rough.
- ✔ Vehicle cranks but refuses to start.
- ✔ Intermittent stalling, especially when warm.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our Programmed 2010-2013 Avalanche 1500 ECM?
This isn’t just a replacement part; it’s a comprehensive, hassle-free solution. We take the guesswork and expense out of the repair process. Before we ship your module, our technicians use your vehicle’s VIN to flash the unit with the most current, stable software available from General Motors. This ensures that the ECM is perfectly matched to your vehicle’s specific configuration, including engine, transmission, and factory options. This process eliminates the need for expensive programming tools or a trip to the dealership, saving you time and money. This module is a direct replacement for part numbers 12633238 and 12633055 and fits a wide array of GM vehicles, including the Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, Escalade, and more.
Installation is straightforward. Once you receive the module, simply disconnect the battery, swap the old unit with the new one, and reconnect the battery. You will then need to perform a simple security relearn procedure, which can be done without any special tools and typically takes about 30 minutes. This procedure syncs the new ECM with your vehicle’s anti-theft system. By ordering this pre-programmed 2010-2013 Avalanche 1500 ECM, you are getting a reliable and cost-effective fix to get your truck back on the road and running like new.
Frequently Asked Questions
Do I need to get this ECM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN during or after checkout, and we will flash the module with the correct GM software for your exact vehicle. It will arrive ready for installation.
What is a security relearn procedure?
The security relearn, or anti-theft relearn, syncs the new ECM to your vehicle’s existing keys. It’s a simple process you can do yourself in about 30 minutes. Typically, it involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. We include instructions to guide you.
How can I be sure this part fits my vehicle?
This ECM fits a wide range of GM models listed in the description. The best way to confirm is to check the part number on your original module. This unit directly replaces part numbers 12633238 and 12633055. Providing your VIN for programming also allows us to double-check compatibility.
Will this fix my check engine light?
If the check engine light and associated diagnostic trouble codes (DTCs) are caused by a faulty ECM, then yes, this will resolve the issue. However, it’s essential to properly diagnose the problem first. This module will not fix issues caused by other faulty components like sensors or wiring.
What information do you need from me after I order?
We need your 17-digit Vehicle Identification Number (VIN). This is critical for us to load the correct software and ensure the module communicates properly with your truck’s systems. You can usually find the VIN on your driver’s side dashboard (visible through the windshield) or on the door jamb sticker.