Restore Peak Performance and Reliability to Your GM Vehicle
Is your vehicle suffering from frustrating, hard-to-diagnose issues? A faulty Engine Control Module (ECM) is often the culprit behind poor engine performance, stalling, or even a no-start condition. This isn’t just an inconvenience; it’s a disruption to your work, your family, and your peace of mind. Get your truck, SUV, or performance car back in top form with this professionally programmed Engine Control Module, a direct replacement for part numbers 12633055 and 12633238.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing ECM could be the cause. This unit is the definitive solution for:
- Illuminated Check Engine Light (CEL) with communication-related trouble codes.
- Unexplained stalling or rough idling.
- Noticeable decrease in fuel economy.
- Engine misfires or hesitation during acceleration.
- Complete no-start condition where the engine cranks but won’t fire.
- Intermittent electrical issues affecting other vehicle systems.
Instead of paying steep dealership prices or risking an incorrect part, our programmed ECM 12633055 provides a reliable and straightforward fix. We flash the module with the latest official GM software updates using the VIN you provide, ensuring it’s perfectly matched to your vehicle’s specific configuration.
Features & Benefits
- ✔ VIN-Specific Programming: Arrives pre-programmed to your exact vehicle. This critical step ensures seamless communication with your car’s other modules, eliminating compatibility errors.
- ✔ Plug-and-Play Design: Simply install the module and perform the vehicle’s security relearn procedure. No expensive dealership programming tools required.
- ✔ Updated GM Software: We load the newest software available from the manufacturer, which can resolve factory bugs and improve overall engine efficiency and performance.
- ✔ Broad Compatibility: A direct replacement for a wide range of popular GM vehicles, including the Silverado, Sierra, Corvette, Camaro, Tahoe, and Escalade.
- ✔ Restored Drivability: Get back the smooth, reliable performance you expect from your vehicle, whether it’s a work truck or a family SUV.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: The ECM is the brain of your engine. It manages everything from fuel injection timing to transmission shift points. When it fails, the symptoms can be chaotic and misleading. We often see vehicles where owners have replaced multiple sensors trying to chase a problem that was in the computer all along. Installing a correctly programmed ECM 12633055 isn’t just about replacing a part; it’s about restoring the central command system. The VIN-matching process is non-negotiable for a successful repair, as it ensures all the vehicle’s specific options—from the transmission type to the emissions system—are correctly recognized.
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). You can typically add it as a note during checkout or reply to your order confirmation email. We cannot program and ship your module without it.
Is any additional programming required after installation?
While the core engine programming is complete, you will need to perform a security relearn procedure (often called a VATS relearn or Passlock relearn) so the module recognizes your vehicle’s keys. This is a simple procedure that typically takes 10-30 minutes and does not require special tools.
My original part number is 12633238. Will this work?
Yes. This ECM is a direct, compatible replacement for both 12633055 and 12633238 part numbers. As long as your vehicle is on the fitment list, it will function correctly.
Will this programmed ECM 12633055 fix my exact problem?
This module will correct any issues directly caused by a faulty ECM. However, proper vehicle diagnosis is essential. Please ensure that other potential causes (like wiring, sensors, or fuel system components) have been ruled out by you or your mechanic.
What does the warranty cover?
This unit is backed by our one-year replacement warranty. This covers the module itself in the event of failure during the warranty period. It does not cover labor, diagnostics, or shipping costs.