Get Your Vehicle Back on the Road, Fast.
Is your Chevrolet SS, Caprice, Silverado, or another GM vehicle acting erratically, refusing to start, or flashing a persistent check engine light? A failing Engine Control Module (ECM) can bring your entire vehicle to a halt, causing immense frustration. This isn’t just an inconvenience; it’s a critical failure that compromises performance, fuel economy, and reliability. We offer the definitive solution: a professionally programmed ECM, part number 12633238, flashed specifically to your vehicle’s VIN for a seamless installation.
Common Symptoms & Your Solution
A faulty ECM is the hidden culprit behind many perplexing vehicle issues. If you’re experiencing any of the following, this module is the reliable fix you need:
- Complete no-start condition or intermittent starting
- Stalling or rough idling for no apparent reason
- Poor engine performance and reduced power
- Drastically decreased fuel efficiency
- Check Engine Light (CEL) with communication-related codes (U-codes)
- Inaccurate or failing sensor readings despite new sensors
- Transmission shifting problems or other electronic module malfunctions
Replacing the ECM with our VIN-programmed unit restores the central command system of your vehicle, correcting these issues and returning it to factory-specified operation. Our process ensures this part integrates perfectly with your vehicle’s existing systems, eliminating the need for an expensive trip to the dealership for programming.
Features & Tangible Benefits
- โ Programmed to Your VIN: We flash the module with your vehicle’s specific information and the latest GM software updates before it ships. This ensures a true plug-and-play experience.
- โ Restored Peak Performance: A correctly functioning ECM is essential for proper fuel delivery, ignition timing, and transmission control, bringing back the power and responsiveness you expect.
- โ Direct OEM Replacement: This unit is a direct fit for GM part numbers 12633238 and 12633055, guaranteeing proper mounting and connection for a wide range of vehicles.
- โ Cost-Effective Solution: Avoid the high costs and scheduling hassles of dealership programming. This is a straightforward fix for independent repair shops and skilled DIY mechanics.
- โ Assured Reliability: This unit is backed by our one-year replacement warranty, giving you confidence and peace of mind in your repair.
From the Technician’s Bench: In today’s vehicles, the ECM doesn’t just run the engine; it’s the hub of a complex communication network. When it fails, it can send confusing signals that make diagnosing the root cause nearly impossible. Mechanics often chase phantom sensor codes for weeks, replacing perfectly good parts. A pre-programmed ECM is a game-changer. It provides a known-good foundation, instantly restoring communication and allowing the vehicle’s systems to work in harmony again. It’s the difference between a frustrating repair and a confident, successful one.
Frequently Asked Questions
Is this ECM truly plug-and-play?
Yes. We program the unit using the VIN you provide, which loads all the correct software and calibrations for your specific vehicle. This allows it to work with your existing components right out of the box. In some cases, a simple security relearn procedure may be required, which can be done without special tools.
What information do you need from me after I order?
After you complete your purchase, you will need to send us your vehicle’s 17-digit Vehicle Identification Number (VIN). We cannot program and ship your part without it.
How do I know if this will fix my car’s problem?
This module is the solution for a faulty ECM. While it can’t fix a bad sensor or wiring issue, it resolves the problems listed above, such as no-start conditions, communication error codes, and erratic behavior directly caused by a failing computer. Proper vehicle diagnostics are always recommended.
My original part number is 12633055. Will this work?
Absolutely. This ECM is a direct replacement for both part numbers 12633238 and 12633055. Please also verify your vehicle’s make, model, and year against the detailed fitment list provided.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty. This gives you security and peace of mind knowing you’re covered in case of any issues with the module.