Is Your GM Truck or SUV Running Rough? Get It Back in Top Form.
There’s nothing more frustrating than an unreliable vehicle, especially when it’s the heart of your daily work or family life. If you’re dealing with a persistent check engine light, stalling, erratic shifting, or a vehicle that won’t start at all, a failing Engine Control Module (ECM) is often the culprit. This isn’t just an inconvenience; it’s a critical failure that affects performance, fuel economy, and safety. Instead of facing the high costs and long wait times at a dealership, get the precise, reliable solution delivered right to your door. This is the brain of your engine, restored to perfect working order.
Common Symptoms & Your Solution
A faulty ECM can cause a wide range of confusing issues. If you’re experiencing any of the following, this pre-programmed computer is your definitive solution:
- Persistent Check Engine Light (CEL) with various communication or sensor codes.
- Engine Stalling or Misfiring for no apparent reason.
- No-Start Condition where the engine cranks but won’t turn over.
- Poor Fuel Economy and a noticeable loss of power.
- Harsh or Incorrect Automatic Transmission Shifting.
- Communication issues with diagnostic scan tools.
This module is a direct replacement for part numbers 12633238 and 12633055, providing a seamless fix. We handle the complex part for you by programming this Programmed 12633238 ECM with the latest GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). It arrives ready to install, getting you back on the road with confidence.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s exact VIN, ensuring it works perfectly right out of the box. No expensive trips to the dealer for programming are required.
- ✔ Latest GM Software Updates: Your ECM will be loaded with the newest factory software, often correcting issues the original programming had and improving overall vehicle operation.
- ✔ Plug-and-Play Installation: Once you receive the module, the physical installation is straightforward for any competent mechanic or experienced DIYer. Simply disconnect the battery, swap the modules, and reconnect.
- ✔ Cost-Effective Solution: Avoid the premium costs associated with a dealership parts department and labor. This is a smart, effective repair that saves you time and money.
- ✔ One-Year Protection: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Programming
As a technician, I’ve seen countless vehicle issues caused by improperly matched computers. Many sellers ship blank units, forcing you to find a specialized shop for programming. Worse, an incorrect program can trigger the vehicle’s anti-theft system (like GM’s Passlock/VATS), leaving you with a truck that still won’t start. We eliminate that entire headache. By programming the module to your VIN before it ships, we ensure all systems—from the engine to the security—recognize the new ECM as the correct component, making for a smooth and successful repair.
Frequently Asked Questions
Do I need to do any additional programming after installation?
No. This Programmed 12633238 ECM arrives fully flashed to your vehicle’s VIN and is ready for installation. In most cases, no further action is needed. Some vehicles may require a simple security relearn procedure, which can be done without any special tools and instructions can be readily found online.
How do I provide you with my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us via direct message. We cannot ship your part until we receive the VIN.
Where can I find my VIN?
Your VIN can be found on a metal plate on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my vehicle’s anti-theft or security system issues?
Because we program the ECM with your vehicle’s specific VIN, it correctly syncs with the existing security system. This prevents the anti-theft lockouts that occur when installing a non-programmed or incorrectly programmed module.
Is this a brand new part from the dealer?
This is a quality, tested OEM replacement part that has been verified to meet or exceed original factory specifications. It is professionally programmed to ensure reliability and performance.