Is your vehicle running rough, stalling, or showing a persistent check engine light?
A faulty Engine Control Module (ECM) can be the source of countless frustrating and hard-to-diagnose issues, leaving you stranded and facing expensive repair bills. Get your vehicle back on the road with confidence using this professionally programmed Engine Control Module. We take the guesswork out of the repair by flashing the unit with your vehicle’s specific VIN and the latest official GM software updates before it ever leaves our facility. This critical step ensures your new computer communicates flawlessly with your vehicle’s systems right out of the box.
Common Symptoms & Your Solution
If you’re experiencing issues like poor fuel economy, erratic shifting, a no-start condition, or diagnostic trouble codes (DTCs) pointing to internal processor failure, this 12643636 ECM is the definitive solution. It’s designed to resolve these problems and restore the precise engine management your vehicle needs for optimal performance and reliability. Forget about costly towing fees and programming charges at the dealership—this is the direct, plug-and-play fix you need.
- ✔ VIN-Programmed for Your Vehicle: We flash this module with your vehicle’s specific VIN and the latest GM software updates. This ensures perfect compatibility and a true plug-and-play installation, saving you a trip to the dealership.
- ✔ Restores Peak Performance: Corrects common issues like rough idling, poor acceleration, hesitation, and incorrect automatic transmission shifting, bringing your engine’s efficiency and power back to factory specifications.
- ✔ Broad GM Compatibility: This single unit is a direct replacement for multiple part numbers, including 12668866, 12668994, 12663405, and more, making it a versatile and reliable solution for a wide range of GM cars, trucks, and vans.
- ✔ Eliminates Guesswork: By providing a pre-programmed module, we eliminate the most complex step of the repair. Simply install the part, perform any necessary security relearn procedure, and you’re ready to go.
- ✔ One-Year Replacement Warranty: This unit is backed by our one-year replacement warranty, giving you complete peace of mind with your purchase.
Expert Insight: The Critical Role of VIN Programming
Many ECM failures are misdiagnosed. However, when the module itself is the culprit, simply swapping it with a used one from another vehicle won’t work. Modern vehicles operate on a complex network where the ECM must be programmed to the specific VIN to communicate with the transmission controller, anti-theft system (immobilizer), and body control module. Our pre-programming service handles this critical step for you, turning a complex electronic repair into a straightforward component replacement. This is the secret to a successful and stress-free installation.
This 12643636 ECM is your opportunity to fix your vehicle correctly the first time. Restore the smooth operation and dependability you rely on, whether you’re commuting to work, running family errands, or getting the job done at a work site.
Frequently Asked Questions
How does the programming process work?
After you complete your purchase, you must provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians use this VIN to load the correct, updated software from GM for your specific make, model, and options. This makes the unit ready for installation upon arrival.
Is this a true plug-and-play installation?
Because we program the module to your VIN, it is plug-and-play in terms of engine and transmission operation. However, depending on your vehicle’s specific anti-theft system, you may need to perform a simple security relearn procedure, which can typically be done without special tools. Instructions are widely available online for this process.
How do I find my vehicle’s VIN?
Your VIN can be found on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, and on your vehicle’s registration and insurance documents.
Will this fix my check engine light?
If the check engine light and associated symptoms have been correctly diagnosed as a failed ECM, then this part will resolve the issue. We always recommend proper diagnostics to confirm the ECM is the point of failure before ordering.
My original part number isn’t 12643636, will this still work?
Yes. This 12643636 ECM is a direct replacement for several other part numbers, including 12668866, 12668994, 12663405, 12670335, and more as listed in the fitment guide. As long as your vehicle is on the compatibility list, this programmed module will work correctly.
What does the one-year replacement warranty cover?
The warranty covers the failure of the unit itself. If the module fails within one year of the purchase date, we will provide a direct replacement. The warranty does not cover labor costs or issues caused by other faulty components on the vehicle.