Is Your Vehicle Running Poorly, Stalling, or Showing a Check Engine Light?
The Engine Control Module (ECM), often called the engine computer, is the brain of your vehicle’s engine management system. It controls critical functions like fuel injection, ignition timing, and emissions systems. When it begins to fail, it can cause a wide range of frustrating and difficult-to-diagnose issues, leaving your vehicle unreliable or even undriveable. Symptoms can start small, like a slight hesitation or decreased fuel economy, and escalate to a no-start condition that leaves you stranded. Don’t let a faulty computer dictate your vehicle’s performance. This genuine, used GM ECM 12669908 is the direct-fit, reliable solution to restore your vehicle’s factory operation.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light: The most common indicator, often with codes related to module communication or sensor circuits (e.g., U-codes, P0606).
- ✔ No-Start or Hard Starting: The engine cranks but won’t start, or takes an unusually long time to fire up.
- ✔ Poor Engine Performance: Noticeable loss of power, hesitation during acceleration, and rough idling.
- ✔ Reduced Fuel Economy: The engine may run too rich or too lean, causing a sudden and significant drop in MPG.
- ✔ Intermittent Stalling: The vehicle may stall for no apparent reason, either while driving or at a stop.
- ✔ Transmission Shifting Issues: The ECM communicates with the transmission controller, and a fault can lead to harsh or erratic shifting.
The Smart Solution: A VIN-Programmed GM ECM 12669908
Replacing a modern ECM isn’t as simple as swapping a part. The module is specific to the vehicle’s VIN, containing information about its engine, transmission, and factory options. Our service eliminates the guesswork and the expensive trip to the dealership. We take this genuine, used OEM module and program it with the latest GM factory software specific to your vehicle’s VIN. This ensures that all systems communicate correctly and your engine operates exactly as the manufacturer intended.
Here’s how it works:
- Place your order for this ECM.
- Provide us with your vehicle’s 17-digit VIN.
- Our technicians will flash the module with the correct, updated calibration file from GM.
- We ship the programmed module directly to you, ready for installation.
Understanding the Installation and Relearn Process
Once you receive your programmed GM ECM 12669908, you or your mechanic will install it. In many cases, the vehicle will not start immediately after installation. This is normal and is due to the vehicle’s anti-theft system. A Vehicle Theft Deterrent (VTD) relearn, also known as a security relearn, must be performed. This procedure syncs the new ECM with your vehicle’s keys and other security modules.
IMPORTANT: This VTD relearn, along with any other necessary procedures like a crankshaft position variation relearn or injector flow rate programming, is the responsibility of the installer. These procedures typically require a professional scan tool or access to GM’s TIS2Web programming system. We provide the correctly programmed part; the final integration into the vehicle must be completed on-site.
Verified Vehicle Fitment for Part 12669908
This module is a direct replacement for service number 12669908 and fits a wide range of GM vehicles. Please verify your original part number before ordering. This part is compatible with the following models and options:
- Acadia: 2017 (2.5L, VIN Z), 2018 (2.5L)
- ATS: 2017 (2.0L)
- Cruze: 2017-2018 (Gasoline)
- CTS: 2017 (2.0L)
- Equinox: 2018 (1.5L or 2.0L), 2019 (1.5L, ID 12669908)
- LaCrosse: 2018 (2.5L)
- Malibu: 2017, 2018 (1.8L or 2.0L)
- Regal: 2018 (2.0L)
- Volt: 2017-2018 (Gasoline)
Frequently Asked Questions
What information do you need to program the ECM?
We require your vehicle’s 17-digit Vehicle Identification Number (VIN). This allows us to load the exact factory software and calibrations for your specific engine, transmission, and options. Please provide the VIN during or after checkout.
Is this part plug-and-play?
No. While we program the module to your VIN, a security relearn (Vehicle Theft Deterrent relearn) is almost always required after installation. Other relearns, like for the crankshaft position sensor, may also be necessary. This must be done by the installer using a capable scan tool.
Why choose a used, programmed ECM?
A used OEM ECM offers the best of both worlds: the reliability and perfect compatibility of a genuine factory part at a fraction of the cost of a new one. By having it pre-programmed, you save on the high labor costs and hassle of dealership programming.
How do I find my original part number?
The part number, or service number (serv. no.), is printed on a sticker on the case of your current ECM. You will need to locate the ECM in your vehicle’s engine bay (often on the driver’s side) to read the label. Matching this number is the best way to ensure compatibility.
What if I install it and the car doesn’t start?
This is the expected behavior in most cases. The vehicle’s anti-theft system needs to be synchronized with the replacement ECM. This is done via the security relearn procedure. Please consult a professional mechanic or your vehicle’s service manual for the specific steps.