Get Your GM Running Like New Again
A faulty Engine Control Module (ECM) can bring your vehicle to a standstill, causing immense frustration and costly downtime. If you’re experiencing issues like a no-start condition, erratic engine behavior, a persistent check engine light, or poor fuel economy, your vehicle’s brain may be the culprit. This replacement Engine Control Module, corresponding to part numbers 12633055 and 12633238, is the definitive solution to restore your vehicle’s performance and reliability. We take the guesswork and hassle out of the repair by pre-programming each unit to your specific Vehicle Identification Number (VIN) before it ships. This ensures a seamless, plug-and-play installation, getting you back on the road with confidence.
Common Symptoms & Your Solution
If your truck, van, or SUV is suffering, it might display several warning signs of ECM failure. This module is the direct fix for problems such as:
- Complete failure to start
- Stalling or rough idling
- Noticeable drop in fuel efficiency
- Transmission shifting problems
- Check Engine Light with communication error codes (like U0100) or internal processor codes (like P0606)
Ordering our Programmed 12633055 ECM is the most efficient way to resolve these issues. We handle the complex programming, so you can focus on the straightforward installation.
Features & Tangible Benefits
- ✔ Plug & Play Installation: We pre-program this module to your vehicle’s specific VIN, eliminating the need for a costly trip to the dealership for programming.
- ✔ Latest GM Software: Your ECM arrives with the newest stable software updates from General Motors, ensuring optimal performance, emissions compliance, and efficiency.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for part numbers 12633055 and 12633238, ensuring a perfect fit and function for the extensive list of compatible GM vehicles.
- ✔ Restored Drivability: By replacing your failing computer, you’ll resolve common issues like rough idling, stalling, poor fuel economy, and check engine lights, making your vehicle dependable once more.
- ✔ Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
Many vehicle owners don’t realize that a modern ECM is not a one-size-fits-all part. It’s a blank computer that needs specific instructions to communicate with your vehicle’s other systems—from the transmission to the anti-lock brakes. Without the correct VIN-specific software, the vehicle simply won’t run correctly, if at all. Our mandatory VIN programming service bridges that critical gap. We ensure the Programmed 12633055 ECM you receive is perfectly matched to your vehicle’s factory specifications, saving you from the compatibility headaches that plague many DIY repairs.
Frequently Asked Questions
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically reply to your order confirmation email or follow the instructions provided after checkout. We cannot ship your part until we receive this information.
Is this a simple plug-and-play installation?
Yes, because we program the ECM to your VIN, it is designed to be a direct, plug-and-play installation. In some rare cases, a security or CASE relearn procedure may be required, which can be performed with a capable scan tool.
Will this fix my specific check engine light code?
This ECM is the correct solution for internal module failure codes (e.g., P0600-P0606) and communication faults. However, it’s crucial to properly diagnose your vehicle. If the code is for a faulty sensor, replacing the ECM will not fix the root cause. Always confirm your diagnosis before ordering.
Is this a new or used part?
This is a quality, inspected, and tested used OEM part that has been verified for full functionality before being programmed with the latest software for your vehicle.
What is the difference between part numbers 12633055 and 12633238?
These are interchangeable hardware numbers from GM. Our Programmed 12633055 ECM is a verified replacement for either part number and will function identically once programmed for your vehicle.