Dealing with frustrating engine problems in your 2017 Buick Verano? Unexplained stalling, a persistent check engine light, or erratic performance can often point directly to a failing Engine Control Module (ECM). As the central computer for your engine, its health is non-negotiable. This isn’t just a replacement part; it’s a direct-fit, reliable solution designed to restore your vehicle’s performance and get you back on the road with confidence.
We take the guesswork and high costs out of the equation. Before we ship this module, we program it specifically to your vehicle using your VIN. This means it arrives loaded with the latest GM software updates, ready for installation right out of the box. You can bypass the expensive programming fees and scheduling hassles at the dealership, making this a smart, efficient fix for both seasoned mechanics and determined DIYers.
From the Diagnostic Bay
I remember a 2017 Equinox that came into my shop with a laundry list of intermittent issues—stalling at lights, hard starts, and a check engine light that threw a P0601 (Internal Control Module Memory Check Sum Error). The owner had already replaced the spark plugs and a sensor with no luck. After confirming power and ground to the ECM were solid, we knew the computer itself was the culprit. Swapping in a VIN-programmed module like this one resolved every single symptom in under an hour. It’s a classic failure mode for these GM platforms, and a pre-programmed unit is the most efficient fix.
Is Your Vehicle Showing These Symptoms?
A failing ECM can cause a wide range of problems that are often misdiagnosed. If your car is experiencing any of the following, a faulty engine computer could be the root cause:
- ✔ Check Engine Light is on with codes like P0601, P0606, or other internal processor faults.
- ✔ The engine cranks but refuses to start.
- ✔ Intermittent stalling or rough idling for no apparent reason.
- ✔ Noticeable decrease in fuel economy.
- ✔ Poor engine performance, hesitation, or misfires.
- ✔ Communication errors with diagnostic scan tools.
A Straightforward Guide to Your 2017 Verano ECM Installation
Installing your new ECM is a manageable job for most DIYers. Following these steps ensures a smooth process. Always consult a vehicle-specific repair manual if you’re unsure.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the ECM: On many of these models, the ECM is found in the engine compartment, often on the driver’s side (LH) or behind the fan shroud. Identify the module with its distinct wiring harnesses.
- Disconnect and Remove: Carefully unplug the electrical connectors. Most have a locking tab that needs to be released. Once disconnected, unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure the bolts. Reconnect the wiring harnesses, ensuring they click securely into place.
- Final Steps: Reconnect the negative battery terminal. Your vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Start the engine and let it idle to confirm the repair.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12667002, 12666070, and 12667189. It is guaranteed to fit the following vehicles and configurations:
- ✔ 2017 Buick Verano – Electronic Control Module
- ✔ 2017 Buick Regal – Electronic Control Module (LH engine compartment)
- ✔ 2017 Buick Enclave – Electronic Control Module (behind fan shroud)
- ✔ 2017 Cadillac XTS – Electronic Control Module (3.6L, VIN 3, LFX)
- ✔ 2017-2019 Cadillac XTS – Electronic Control Module (3.6L, VIN 3, LFX)
- ✔ 2017 Cadillac CAPRICE – Electronic Control Module (3.6L)
- ✔ 2017 Chevrolet Traverse – Electronic Control Module (behind fan shroud)
- ✔ 2017-2019 Chevrolet Impala – Electronic Control Module
- ✔ 2017 Chevrolet Equinox – Electronic Control Module (LH engine compartment)
- ✔ 2017 GMC Acadia – Electronic Control Module (VIN J, Limited, behind fan shroud)
- ✔ 2017 GMC Terrain – Electronic Control Module (LH engine compartment)
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming after I receive it?
No. We program the module to your car’s specific VIN before shipping. It arrives ready for installation. In some cases, a simple security or key relearn procedure may be necessary, which doesn’t require special tools.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add it as a note during checkout or send it to us in a message referencing your order number.
Is this compatible with other part numbers?
Yes, this ECM is a direct replacement for part numbers 12667002, 12666070, and 12667189. If your original module has one of these numbers, this part will work for you.
What if my problem isn’t fixed after installation?
While this ECM fixes the most common causes of the symptoms listed, automotive diagnostics can be complex. Ensure all connections are secure. If issues persist, it may indicate another underlying problem with wiring, sensors, or other components that should be professionally diagnosed.