Restore Peak Performance and Reliability to Your GM Vehicle
Is your 2017 Chevrolet Traverse suffering from a persistent check engine light, erratic shifting, or a frustrating no-start condition? As a technician with over two decades of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can cause a cascade of confusing problems that even experienced mechanics can misdiagnose. This isn’t just a part; it’s the central command for your engine’s performance, fuel economy, and emissions. When it falters, your vehicle’s reliability is compromised. This replacement ECM is your direct, effective solution to get your vehicle running smoothly and dependably again.
We take the guesswork and high costs out of the equation. Each module is meticulously programmed with the latest official GM software updates, tailored specifically to your vehicle’s VIN. This means you get a component that is truly ready for installation right out of the box. You can bypass the expensive trip to the dealership for programming and avoid the need for specialized scan tools. This is the straightforward fix you’ve been looking for to restore your engine’s proper function and your peace of mind.
Case Study: A Tricky Diagnosis
I remember a 2017 Acadia that came into my bay with a complaint of intermittent stalling and a check engine light. The owner had already replaced the throttle body and a camshaft position sensor based on the codes, but the problem persisted. My diagnostic process led me to the ECM. After connecting my scope, I found the 5-volt reference signal was dropping out intermittently, causing the sensors to report false data. We installed a correctly programmed ECM, and the problem was solved instantly. It’s a classic example of how a faulty module can send you chasing ghosts, making this direct-fit, pre-programmed solution invaluable.
Is Your Vehicle Showing These Symptoms?
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Unexplained loss of engine power or poor acceleration.
- ✔ Rough or unstable idling.
- ✔ Decreased fuel efficiency.
- ✔ Vehicle intermittently fails to start or stalls while driving.
- ✔ Communication error codes, such as U0100.
- ✔ Internal processor failure codes, including P0601, P0606, or P062F.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the ECM: On the 2017 Traverse, the ECM is typically located behind the fan shroud in the engine bay. On other compatible models, it may be on the driver’s side (LH) of the engine compartment.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. Use a small flathead screwdriver to release the locking tabs if necessary. Then, unbolt the old module from its mounting bracket.
- ✔ Install the New Module: Mount the new ECM securely onto the bracket and reconnect all electrical harnesses. Ensure they click firmly into place.
- ✔ Final Step: Reconnect the negative battery terminal. The vehicle is now ready to start. In some cases, a security or anti-theft relearn procedure may be required, which can typically be done without special tools (consult your owner’s manual).
Will This Fit My Vehicle?
This ECM is a guaranteed fit for the following vehicles and options. It is a direct replacement for part numbers 12667002, 12666070, and 12667189.
- ✔ 2017 Chevrolet Caprice: 3.6L
- ✔ 2017 Chevrolet Traverse: Located behind fan shroud
- ✔ 2017-2019 Cadillac XTS: 3.6L, with VIN 3 (8th digit, opt LFX)
- ✔ 2017 GMC Acadia: Limited models with VIN J (11th digit), located behind fan shroud
- ✔ 2017 Buick Enclave: Located behind fan shroud
- ✔ 2017 Buick Regal: Located in LH engine compartment
- ✔ 2017 Buick Verano
- ✔ 2017-2019 Chevrolet Impala
- ✔ 2017 Chevrolet Equinox: Located in LH engine compartment
- ✔ 2017 GMC Terrain: Located in LH engine compartment
Frequently Asked Questions
How do I provide my VIN for programming?
After completing your purchase, please send us a message with your vehicle’s 17-digit VIN. We cannot program and ship your module without this information.
Is this ECM truly plug-and-play?
Yes, it comes programmed to your VIN with the latest GM software. In most cases, you simply install it and start the vehicle. Some models may require a simple key relearn procedure, which is outlined in your owner’s manual.
Will this fix my specific problem?
This module corrects issues directly caused by a faulty ECM, such as internal processor errors (P0606) or communication faults. While it resolves many common symptoms, we always recommend a proper diagnosis to confirm the ECM is the root cause of your vehicle’s issue.
Does this part require a core charge?
No, there is no core charge or need to return your old, faulty module. You can recycle it locally.
What if my original part number is different?
This ECM 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.