When your vehicle’s brain fails, everything stops. A faulty Engine Control Module (ECM) can bring your work van or daily driver to a grinding halt, causing frustrating no-start conditions, poor fuel economy, and a dashboard lit up with warning lights. Get back on the road quickly and confidently with this direct-fit replacement Engine Control Module, professionally programmed with the latest GM software specifically for your vehicle’s VIN.
Common Symptoms & Your Solution
If you’re experiencing issues like engine misfires, erratic shifting, stalling, or persistent check engine lights with communication error codes (such as U0100) or internal processor failure codes (like P0601, P0606), a failing ECM is the likely culprit. This unit is the definitive solution, engineered to restore communication between all your vehicle’s critical systems and get it running like new again. By providing your VIN at checkout, you receive a unit that is ready for installation, eliminating the need for an expensive trip to the dealership for programming. This is the most efficient way to solve the problem and minimize downtime for your 2016 Savana 3500 ECM 12643636.
- ✔ Plug & Play Installation: Arrives pre-programmed to your vehicle’s unique VIN, ensuring it’s ready to install right out of the box.
- ✔ Restored Factory Performance: Flashed with the newest official GM software updates to optimize fuel efficiency, emissions, and engine performance.
- ✔ Guaranteed Compatibility: A direct replacement for multiple part numbers including 12668866, 12668994, and 12643636, ensuring a perfect fit and function.
- ✔ Eliminate Guesswork: Solves complex electronic issues that cause poor drivability and frustrating diagnostic dead-ends.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
In modern vehicles, the ECM is the central command center. It doesn’t just manage the engine; it communicates with the transmission, ABS, body control module, and more. Simply installing a used, unprogrammed computer will result in a no-start condition because the vehicle’s anti-theft system won’t recognize it. Our VIN-specific programming service correctly calibrates the module to your exact vehicle options and immobilizer system. This crucial step ensures all components work together seamlessly as the manufacturer intended, saving you from hours of troubleshooting and the high cost of dealer-only programming tools.
Frequently Asked Questions
Do I need to do anything after I install this ECM?
While this ECM comes fully programmed to your VIN, some vehicles may require a simple “relearn” procedure after installation. This can often include a security relearn (turning the key on for 10-15 minutes) or a crankshaft position sensor relearn, which can be done with a capable scan tool. These procedures allow the new module to sync perfectly with your vehicle’s existing sensors.
What information do you need from me?
After you complete your purchase, we will need your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to load the correct, factory-specified software and calibration files for your exact make, model, and options.
Will this fix my check engine light?
If the check engine light and associated diagnostic trouble codes (DTCs) are caused by a faulty original ECM, then this replacement unit is designed to be the solution. We always recommend ensuring that the root cause of the failure (e.g., a shorted sensor or wiring) has been repaired to prevent damage to the new module.
Is this a genuine OEM part?
This is a high-quality, tested original equipment part that has been professionally programmed with official GM software. It is designed to meet or exceed all factory specifications for your vehicle, including the 2016 Savana 3500 ECM 12643636.
How can I be sure this fits my vehicle?
This ECM is a direct replacement for the part numbers listed in the description. The most reliable way to ensure compatibility is to match the part number from your old unit. If you are unsure, providing us with your VIN allows us to verify the correct module for your vehicle before we program and ship it.