Restore Peak Performance to Your GM Vehicle
Is your Cadillac, Chevrolet, or GMC suffering from perplexing engine issues? A faulty Engine Control Module (ECM), often called the vehicle’s brain, is a common culprit behind poor performance, reduced fuel economy, and frustrating no-start conditions. This genuine GM Engine Control Module, part number 12669318, is the definitive solution to restore your vehicle’s factory-specified operation. We take the guesswork and dealership hassle out of the equation by pre-programming this module specifically for your vehicle using your VIN. This ensures a seamless installation process and immediate results.
From the Diagnostic Bay
We had a 2015 Silverado 1500 in the shop that was driving the owner crazy. It would randomly stall at stoplights, but then start right back up. He’d already replaced the fuel pump and cleaned the throttle body based on advice he found online, but the problem persisted. After hooking up our diagnostic scanner and monitoring live data, we noticed erratic voltage readings from several key sensors, but only intermittently. The wiring checked out fine. This pointed us to the ECM itself. The internal voltage regulator was failing under specific heat conditions. We installed a VIN-programmed ECM, and the truck ran perfectly. It’s a classic case where throwing parts at a problem doesn’t work; you need to address the core processing unit. This GM Engine Control Module 12669318 is the exact fix for that kind of problem.
Common Symptoms of a Failing ECM
A failing engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, your ECM could be the root cause:
- ✔ Check Engine Light: The most obvious sign. The light may be on constantly or intermittently, often with codes related to sensor circuits, module communication, or processor faults.
- ✔ Engine Stalling or Misfiring: The ECM controls ignition timing and fuel injection. A fault can cause random stalling, rough idling, or misfires that feel like a bad spark plug or coil.
- ✔ No-Start Condition: If the ECM fails to power up or communicate with the ignition and fuel systems, your vehicle will crank but won’t start.
- ✔ Poor Performance and Fuel Economy: An ECM that isn’t correctly managing the engine’s air-fuel mixture and timing will lead to a noticeable drop in power, acceleration, and gas mileage.
- ✔ Shifting Problems (Automatic Transmission): The ECM works in tandem with the Transmission Control Module (TCM). A faulty ECM can send incorrect data, leading to harsh shifting, getting stuck in gear, or other transmission-related issues.
- ✔ Intermittent Electrical Issues: Seemingly unrelated problems, like cooling fans not turning on or erratic gauge behavior, can sometimes be traced back to a failing ECM.
Why Choose Our Pre-Programmed GM Engine Control Module 12669318?
This isn’t just a replacement part; it’s a comprehensive, ready-to-install solution. When you order from us, you’re getting a module that is loaded with the latest, most stable software release from General Motors for your specific vehicle. This process corrects many factory bugs and improves overall vehicle operation. By providing your Vehicle Identification Number (VIN) during checkout, you ensure that the module you receive is a perfect match for your vehicle’s specific configuration, including engine, transmission, and emissions equipment. This eliminates the need for expensive dealership programming or specialized tools, making it a straightforward job for a competent DIYer or any professional mechanic.
This module is a direct replacement for a wide range of popular GM vehicles, including the Cadillac ATS, CTS, and Escalade; the Chevrolet Silverado, Corvette, and Camaro; and the GMC Sierra and Yukon. Please see the detailed fitment list to confirm compatibility with your exact model and year. Replacing your faulty computer with our pre-flashed GM Engine Control Module 12669318 is the most reliable and efficient way to get your vehicle back on the road and running as the manufacturer intended.
Frequently Asked Questions
What is the programming process?
After you place your order, you must provide us with your vehicle’s 17-digit VIN. Our technicians use this VIN to download the latest GM-certified software for your specific vehicle and flash it directly onto the module before it ships. This ensures it’s ready for installation upon arrival.
Is this a plug-and-play installation?
Yes, for most vehicles, this is a direct plug-and-play installation. Once installed, you may need to perform a security relearn procedure (often called a key relearn or anti-theft relearn), which can typically be done without special tools. Instructions are widely available online for this simple procedure.
How do I find my original part number?
Your original part number is printed on a sticker on the housing of your current ECM. This module is a direct replacement for several part numbers, including 12692067, 12676230, 12656993, and 12669318, among others listed in the description.
Will this fix my check engine light?
If the check engine light and associated diagnostic trouble codes (DTCs) are caused by a faulty ECM, then yes, this part will resolve the issue. It is crucial to have your vehicle properly diagnosed to confirm the ECM is the point of failure before ordering.
Do I need to send my old ECM back?
No core charge or return is required for this part. You can keep or responsibly dispose of your old module.