Restore Peak Performance to Your GM Vehicle
As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Engine Control Module (ECM) can turn a reliable vehicle into a source of constant frustration. Random stalling, a persistent check engine light, and unexplainable performance drops are more than just annoyances—they’re signs that your vehicle’s brain is in trouble. This isn’t just a part; it’s the central command for your engine’s health and efficiency. We offer a dependable solution: a professionally programmed Engine Control Module, part number 12667189, designed to get your vehicle back to factory-spec operation without the dealership price tag.
The biggest hurdle with ECM replacement has always been the programming. In the past, you’d buy the part, install it, and then have to get your vehicle towed to a dealer or a specialized shop with expensive tools to get it programmed. We eliminate that entire step. When you order from us, you provide your Vehicle Identification Number (VIN), and we flash the module with the very latest GM-certified software specifically for your car. This ensures your new 2017 Acadia Engine Control Module communicates flawlessly with all other systems, from the transmission to the fuel injectors, right out of the box.
Is Your GM Vehicle Showing These ECM Failure Signs?
A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module may need replacement. I’ve diagnosed hundreds of these, and these are the most common symptoms I see in the shop:
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Diagnostic Trouble Codes (DTCs) related to internal processor failure, such as P0601, P0603, or P0606.
- ✔ Communication loss codes like U0100, indicating the ECM isn’t talking to other modules.
- ✔ Unexplained engine stalling, hesitation, or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling or erratic engine performance.
- ✔ Automatic transmission shifting harshly or at the wrong times.
From the Diagnostic Bay
I remember a 2017 Chevy Traverse that was brought to my shop. The owner was frustrated with an intermittent stalling problem that two other shops couldn’t solve. The vehicle would run fine for days, then suddenly die at a stoplight. It was throwing a P0606 (ECM/PCM Processor Fault) code. The first step in any ECM diagnosis is to meticulously verify all power and ground circuits to the module—a bad ground can mimic a bad computer. After confirming the wiring was solid, we knew the ECM itself was the culprit. By providing a pre-programmed module like this one, we saved the customer over $400 compared to the dealer quote and had them safely back on the road the same afternoon. This is the kind of straightforward, effective repair we aim to provide.
A Straightforward Guide to Installation
Installing your new 2017 Acadia Engine Control Module is a manageable job for a confident DIYer or any professional technician. Since we handle the programming, your main job is the physical swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to ensure all systems are powered down.
- Locate the Old ECM: On many of these models (like the Acadia, Traverse, and Enclave), the ECM is located behind the fan shroud. On others (like the Regal, Equinox, and Terrain), it’s typically found in the engine compartment on the driver’s side (LH). Consult a service manual for your specific vehicle if you’re unsure.
- Disconnect and Remove: Carefully unplug the electrical connectors. Most have a locking tab or lever that needs to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New ECM: Mount your new, pre-programmed ECM securely onto the bracket. Reconnect the electrical harnesses, making sure they click firmly into place. A clean, tight connection is critical.
- Reconnect Power: Reattach the negative battery terminal.
- Final Steps: In some cases, a security relearn procedure may be necessary for the vehicle to recognize the new module. This is often a simple process (e.g., turning the key to the ‘ON’ position for 10-15 minutes) that doesn’t require special tools. Check your owner’s manual for the specific procedure for your vehicle.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12667002, 12666070, and 12667189. It is guaranteed to fit the following vehicles with the specified options. Please provide your VIN upon purchase to ensure perfect programming for your specific model.
- 2017 ACADIA – Electronic Control Module; VIN J (11th digit, Limited), (behind fan shroud)
- 2017 CAPRICE – Electronic Control Module; 3.6L
- 2017 ENCLAVE – Electronic Control Module; (behind fan shroud)
- 2017 EQUINOX – Electronic Control Module; (LH engine compartment)
- 2017-2019 IMPALA – Electronic Control Module
- 2017 REGAL – Electronic Control Module; (LH engine compartment)
- 2017 TERRAIN – Electronic Control Module; (LH engine compartment)
- 2017 TRAVERSE – Electronic Control Module; (behind fan shroud)
- 2017 VERANO – Electronic Control Module
- 2017-2019 XTS – Electronic Control Module; (3.6L), VIN 3 (8th digit, opt LFX)
Frequently Asked Questions About the 2017 Acadia Engine Control Module
Frequently Asked Questions
Is this part truly plug-and-play?
Yes. Because we program the module to your vehicle’s specific VIN before shipping, it arrives ready for installation. In most cases, no further programming is required, though a simple key-cycle security relearn may be needed.
Where do I find my VIN to send to you?
Your 17-digit VIN can be found on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
What if my original ECM has a different part number?
This module is a direct replacement for several part numbers, including 12667002 and 12666070. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.
Will this fix my vehicle’s check engine light?
If the check engine light is caused by an internal failure of the original ECM (e.g., codes P0601-P0606), then this replacement module is the correct fix. It’s crucial to properly diagnose the issue first to ensure the ECM is the root cause.
Do I need any special tools for installation?
For most installations, you will only need basic hand tools like a socket set to remove the module’s mounting bolts and disconnect the battery. No specialized electronic or programming tools are required.