Restore Your Vehicle’s Performance and Reliability
Is your vehicle running rough, displaying a persistent check engine light, or failing to start altogether? A faulty Engine Control Module (ECM) can be the hidden cause of countless frustrating issues, disrupting everything from fuel economy to engine stability. This replacement Engine Control Module, compatible with part number 12651994, is the definitive solution to get your car, truck, or SUV back on the road with confidence. We take the guesswork and complexity out of the repair by programming the unit specifically to your vehicle’s VIN before it ships. This means no expensive trips to the dealership for programming—it’s ready for installation right out of the box.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing ECM is a likely culprit. This professionally prepared unit is designed to resolve these exact problems:
- Persistent Check Engine Light (CEL) with codes like P0601, P0603, or P0606
- Unexplained engine stalling or misfiring
- Poor acceleration and reduced engine power
- Noticeably worse fuel mileage
- Erratic or harsh transmission shifting
- Complete no-start condition where the engine cranks but won’t turn over
By installing our programmed 12651994 ECM, you are not just replacing a part; you are restoring the central ‘brain’ of your vehicle’s engine management system to its optimal state.
Features & Tangible Benefits
- ✔ VIN-Specific Programming Included: We flash the module with the latest GM software updates using your vehicle’s VIN. This ensures perfect compatibility and function without any additional programming required.
- ✔ Plug-and-Play Design: Because the unit is pre-programmed, installation is dramatically simplified. In most cases, it’s a direct swap that a competent home mechanic can perform.
- ✔ Restored Engine Efficiency: With fresh programming and a fully functional computer, your engine’s fuel delivery and ignition timing are optimized, which can lead to improved MPG and smoother operation.
- ✔ Broad GM Compatibility: This module is a direct replacement for multiple part numbers (12651994, 12643248, 12652814, AA69) and fits a wide range of Cadillac, Chevrolet, Buick, and GMC models.
- ✔ Cost-Effective Dealership Alternative: Save hundreds of dollars compared to the cost of sourcing, purchasing, and programming a new module at a dealership.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight from the Shop Floor
We recently had a 2012 GMC Acadia with an intermittent stalling issue that had stumped two other mechanics. The owner had already replaced the fuel pump and crankshaft sensor with no success. After confirming the diagnostic trouble codes pointed to an internal processor error, we supplied a programmed 12651994 ECM. The owner installed it in his driveway in under an hour. The vehicle started immediately and has been running flawlessly ever since. It’s a powerful reminder that sometimes the most complex electronic gremlins have a straightforward solution.
Frequently Asked Questions
How do I provide my vehicle’s VIN?
After you complete your purchase, you can add your 17-digit VIN to the order notes or reply to your order confirmation email. We cannot ship your part until we receive the VIN, as the programming is essential.
Will I need to do anything after installing the ECM?
In many cases, no. However, some vehicles may require a simple security relearn procedure (often called a CASE relearn or anti-theft relearn) to sync the new ECM with your keys. This procedure can typically be done without special tools and instructions are widely available online for your specific model.
Is this a brand new part?
This is a high-quality, fully tested replacement part that is guaranteed to meet or exceed original equipment performance. Each unit undergoes rigorous inspection and preparation to ensure reliability.
What happens if I provide the wrong VIN?
Providing the correct VIN is absolutely critical. A module programmed with an incorrect VIN will not allow the vehicle to start or run properly. Please double-check the VIN from your driver’s side door jamb or dashboard plate before sending it to us.
Will this fix my specific problem?
If your vehicle’s issues have been properly diagnosed as a faulty engine computer, this programmed 12651994 ECM is the correct solution. It’s always best to have a qualified mechanic diagnose the issue to ensure you are replacing the right part.