Get Your GM Vehicle Back on the Road, Fast.
Is your truck, SUV, or performance car suffering from frustrating and unpredictable engine problems? A faulty Engine Control Module (ECM) can cause everything from a persistent check engine light and poor fuel economy to stalling or a complete no-start condition. This isn’t just an inconvenience—it’s a serious issue that compromises your vehicle’s reliability. This professionally programmed Engine Control Module is the definitive, hassle-free solution to restore your vehicle’s performance and your peace of mind.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing ECM is the likely culprit. This unit is the direct solution for:
- Check Engine Light with communication-related trouble codes (e.g., P0601, P0606)
- Engine stalling, stumbling, or misfiring
- Harsh or erratic automatic transmission shifting
- Reduced engine power and poor acceleration
- Intermittent or complete no-start conditions
- Problems with other electronic modules not communicating
Stop chasing symptoms and replace the core component. We make the process simple by shipping you a Programmed 12633055 ECM that is flashed with the latest GM software updates, specifically matched to your vehicle’s unique VIN. This ensures a seamless installation and proper function right out of the box.
Features & Tangible Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s VIN before it ships, eliminating the need for an expensive trip to the dealership for programming.
- ✔ Latest GM Software: Your ECM arrives with the most current factory software, ensuring optimal engine performance, emissions compliance, and fuel efficiency.
- ✔ Direct-Fit Replacement: Guaranteed to be the correct replacement for original part numbers 12633055 and 12633238, ensuring a perfect fit and connection.
- ✔ Restored Drivability: Solves common engine management issues, restoring the smooth, reliable operation you depend on.
- ✔ Cost-Effective Solution: Get a fully functional, programmed module without the high cost and hassle of sourcing one from a dealer.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
As a technician, I’ve seen countless vehicle issues caused by improperly matched control modules. Simply installing a used ECM from a junkyard won’t work on modern GM vehicles. The module contains critical data specific to your vehicle’s engine, transmission, and options. Without the correct VIN programming, you can face communication errors, security system lockouts, and persistent performance problems. Our pre-programming service isn’t just a convenience; it’s a critical step that ensures the module integrates perfectly with your vehicle, just like the original one did from the factory.
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. Please double-check it for accuracy to ensure a perfect match.
Is any additional programming required after installation?
In most cases, this module is ready to go. However, on many GM vehicles, a security relearn procedure (often called a CASE relearn or anti-theft relearn) may be required after installation. This is a simple procedure that can often be done without special tools and syncs the new ECM to your vehicle’s anti-theft system.
Will this Programmed 12633055 ECM fix my check engine light?
If the check engine light is caused by an internal failure of your original ECM (common codes include P0601, P0602, P0606), then this part is the correct fix. It is essential to properly diagnose your vehicle to confirm the ECM is the point of failure before ordering.
How can I confirm this part fits my vehicle?
Please refer to the detailed fitment list on this page. The most reliable method is to match the part number on your existing ECM to one of the numbers listed (12633055 or 12633238). If you are unsure, please contact us with your VIN before ordering.
What does the warranty cover?
This unit is backed by our one-year replacement warranty. This covers any defects in the module itself. For full details, please refer to our warranty policy page.