Restore Peak Performance to Your Vehicle with a VIN-Programmed Engine Control Module
Is your 2010-2011 Buick LaCrosse, Cadillac CTS, or Chevy Equinox suffering from frustrating and unpredictable issues? Symptoms like a persistent check engine light, poor fuel economy, rough idling, or even a no-start condition often point to a single culprit: a failing Engine Control Module (ECM). As the central computer of your vehicle, the ECM is responsible for managing everything from fuel injection and ignition timing to transmission shifting. When it falters, the entire vehicle’s performance and reliability are compromised.
This is not just a replacement part; it’s a direct solution. We offer a genuine GM Engine Control Module, part number 12642665, that arrives at your door programmed specifically for your vehicle. By providing us with your Vehicle Identification Number (VIN) during checkout, we flash the module with the latest, most stable software updates directly from GM. This critical step ensures seamless communication between the ECM and all other vehicle systems, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2011 Equinox come in with a bizarre complaint: it would randomly stall at stoplights, but only when the A/C was on. No codes were stored initially. After hours of chasing wiring diagrams and testing sensors, we noticed a slight voltage drop at the ECM connector during our live data scan right before a stall. We swapped in a known-good, programmed ECM, and the problem vanished. The original ECM had an internal fault on one of its logic boards that couldn’t handle the specific load change from the A/C compressor clutch engaging. It’s a classic example of how a failing ECM can create symptoms that seem unrelated, making a reliable, correctly programmed replacement essential.
Is a Failing ECM the Source of Your Problems?
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indication that your ECM needs attention. Replacing your failing unit with our pre-programmed module can resolve these common issues:
- ✔ Check Engine Light: The light is on, and you may have codes related to sensors, misfires, or module communication errors (like U-codes).
- ✔ Engine Performance Issues: Noticeable loss of power, hesitation during acceleration, or engine stumbling.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG.
- ✔ Rough or Erratic Idling: The engine idles too high, too low, or surges unpredictably.
- ✔ Starting Problems: The vehicle cranks but won’t start, or it starts intermittently.
- ✔ Transmission Shifting Problems: Harsh shifting, delayed engagement, or getting stuck in a gear (limp mode).
- ✔ Communication Failures: Your scan tool cannot communicate with the ECM.
The Superior Solution: A Programmed 2010-2011 LaCrosse ECM
Why choose our module? We take the guesswork and additional cost out of the repair. A used module from a junkyard will not work, as it’s programmed to the donor vehicle’s VIN and options. Our service bridges that gap. This specific module, also known by part numbers 12616889, 12630908, 12637106, 12650256, and 12651993, is a direct-fit replacement for a wide array of GM vehicles. By programming it before shipment, we ensure that when you install it, it’s ready to integrate with your vehicle’s specific systems, including the anti-theft (immobilizer) system, which may require a simple key relearn procedure upon installation.
Broad Compatibility Across the GM Lineup
While this is a perfect fit for the 2010-2011 LaCrosse ECM, part number 12642665 is also the correct module for many other popular GM models. Please verify your part number and check the detailed fitment list below to ensure compatibility with your vehicle. This module fits various configurations of the Buick Allure, Cadillac CTS & SRX, Chevrolet Camaro, Captiva Sport, Equinox, Impala, Orlando, GMC Terrain, and Saab 9-5 from 2010 through 2013.
Frequently Asked Questions
Do I need to do any programming after I receive the ECM?
No! We program the ECM with the latest GM software using the VIN you provide. In most cases, the only additional step required is a security relearn procedure (also known as a key relearn), which can typically be done in your driveway without any special tools. We include instructions for this simple process.
How do I provide my VIN?
Simply enter your 17-digit Vehicle Identification Number in the designated box during the checkout process or send it to us in a message after your purchase. We cannot ship your part until we have this information.
Is this a brand new part?
This is a high-quality, tested, and verified genuine GM part. Each module undergoes a rigorous inspection and programming process to ensure it meets or exceeds original factory specifications for performance and reliability.
Will this fix my car’s problem for sure?
While this ECM will fix any issues caused by a faulty engine computer, it’s crucial to ensure your vehicle has been properly diagnosed. The ECM is often the solution, but problems with wiring, sensors, or other modules can cause similar symptoms. We recommend a thorough diagnosis by a qualified technician before ordering.
What is your warranty policy?
We stand behind our products with a comprehensive warranty. Please see the warranty tab on this product page for full details and terms of our coverage.