Get Your Vehicle Running Right Again
Is your vehicle suffering from a persistent check engine light, poor performance, or a frustrating no-start condition? A failing Engine Control Module (ECM) is often the culprit, acting as the brain of your engine. This genuine GM Engine Control Module is the definitive solution, designed to restore your vehicle’s performance and reliability. We take the guesswork and hassle out of the repair by professionally programming this unit to your vehicle’s specific VIN before it ever leaves our facility. This means you get a part that’s ready for a straightforward installation, getting you back on the road with confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing computer is the likely cause. This Programmed 12670335 ECM is the reliable fix you need.
- Persistent Check Engine Light (CEL)
- Engine stalling or misfiring unexpectedly
- Vehicle refuses to start
- Noticeable decrease in fuel economy
- Erratic or poor automatic transmission shifting
- Communication error codes (e.g., P0600, P0601, P0606)
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module with the latest GM-certified software using your VIN. This ensures perfect compatibility and function right out of the box, saving you a costly trip to the dealership.
- ✔ Restored Engine Performance: A correctly functioning ECM is critical for optimal fuel delivery, ignition timing, and emissions control. Expect a return to the smooth, efficient performance you depend on.
- ✔ Direct-Fit Replacement: This unit is a direct replacement for a wide range of original part numbers, including 12668866, 12643636, and 12663405, guaranteeing a perfect fit and connection.
- ✔ Cost-Effective Solution: Avoid the high costs and programming fees associated with a dealership repair. This is the professional-grade solution at a sensible price.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
As a technician, I’ve seen countless vehicle owners try to save a few dollars by installing a used ECM from a salvage yard. It almost never works. Modern GM vehicles have sophisticated anti-theft systems (like Passlock/VATS) that link the ECM directly to your specific vehicle’s VIN and key. A mismatched module will prevent the car from starting, period. Our process of programming this Programmed 12670335 ECM to your VIN *before* shipping eliminates this critical failure point. We ensure the module is ready to communicate with your vehicle’s other systems, making the installation process as smooth as possible.
Whether you’re depending on your Silverado 2500 for a tough job or your Cruze for the daily commute, this module is the key to restoring its core function. Don’t let a faulty computer keep you sidelined. Order your Programmed 12670335 ECM today and take the first step towards a reliable repair.
Frequently Asked Questions
What is an ECM and what does it do?
The Engine Control Module (ECM), or engine computer, is the central processor for your vehicle’s engine. It controls critical functions like fuel injection, spark timing, and emissions systems to ensure the engine runs efficiently and reliably.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot ship your part until we receive this information, as it is essential for programming the module correctly.
Is any additional programming required after I install it?
In most cases, no additional programming is needed. The unit arrives ready to install. However, some vehicles may require a simple, key-on/key-off security relearn procedure that you can perform yourself. Instructions are readily available online for this process.
How can I be sure this part will fit my vehicle?
Please review the detailed fitment list on this page. This module replaces several original part numbers. The most crucial step is providing us with your VIN, which allows us to program it specifically for your vehicle’s make, model, and options, guaranteeing compatibility.
What are the most common signs of a bad ECM?
The most common symptoms include a constant check engine light, engine misfires, stalling, poor fuel mileage, and a complete no-start condition. You may also have diagnostic codes related to internal processor failure.