Is your GM vehicle running rough, showing confusing error codes, or failing to start? A faulty Engine Control Module (ECM) can bring your daily driver to a standstill, causing major disruptions to your work and family life. Get back on the road with confidence with this direct-fit, professionally programmed engine computer, designed to restore the performance and reliability you depend on.
Common Symptoms & Your Solution
If you’re experiencing issues like a persistent Check Engine Light, poor fuel economy, erratic engine performance, harsh transmission shifting, or a complete no-start condition, a failing ECM is a likely culprit. Diagnostic Trouble Codes (DTCs) such as U0100 (Lost Communication with ECM), P0601, P0602, or P0606 (Internal Control Module Faults) often point directly to a computer failure. This isn’t just a replacement part; it’s a complete, hassle-free solution. Our programmed 12633238 ECM arrives at your door ready for installation, flashed with the latest GM software updates specific to your vehicle’s unique VIN.
- โ Plug-and-Play Installation: This module is pre-programmed to your VIN, eliminating the need for expensive dealership programming or special tools. Simply install the unit, and you’re ready to go.
- โ VIN-Specific Flashing: We ensure perfect compatibility by programming the ECM to your exact vehicle, restoring all factory settings and communication between critical systems.
- โ Latest GM Software Updates: Your new ECM comes loaded with the most current software from General Motors, which can resolve common factory bugs and improve overall vehicle efficiency and performance.
- โ Direct OEM Fit and Function: Engineered to match the original specifications for part numbers 12633238 and 12633055, guaranteeing a seamless fit and flawless operation.
- โ Rigorously Inspected: Each unit undergoes a thorough inspection and testing process to ensure it meets our high standards for quality and reliability.
- โ This unit is backed by our one-year replacement warranty.
An Expert’s Note on Programming: As a technician for over 20 years, I’ve seen countless headaches caused by improperly matched control modules. A generic, unprogrammed ECM can create more problems than it solves, from transmission issues to security system lockouts. That’s why we insist on programming every module to your specific VIN. It ensures all the vehicle’s systems communicate correctly from the moment you turn the key, just as the factory intended. It’s the difference between a quick fix and a lasting repair.
Frequently Asked Questions
Do I need to do any additional programming after installation?
No. This ECM is a complete plug-and-play solution. We program it to your vehicle’s VIN before shipping, so it’s ready for installation right out of the box. In some cases, a security or crank-relearn procedure may be required, which can be done with a capable scan tool.
How do I provide my VIN number?
After you complete your purchase, you can add your VIN to the order notes or simply reply to your order confirmation email with the 17-digit VIN. We cannot ship your part until we have this information.
Is this the correct ECM for my vehicle?
This module fits a wide range of GM vehicles. Please check the part number on your original unit and compare it to our extensive fitment list. This programmed 12633238 ECM is the correct part if your vehicle is listed and your original part number is 12633238 or 12633055.
What if my original part number is 12633055?
This module is a fully compatible, direct replacement for original units with part number 12633055 as well. It will function identically once programmed to your VIN.
Will this fix my specific problem?
While this part is the definitive solution for a failed engine computer, it is essential that your vehicle is diagnosed correctly. This programmed 12633238 ECM will resolve issues directly caused by a faulty module, but it will not fix problems related to other bad sensors, wiring, or mechanical components.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty.