Restore Peak Performance and Reliability to Your GM Vehicle
If you’re dealing with frustrating and unpredictable engine problems in your 2017 Buick Enclave—like stalling at intersections, a persistent Check Engine Light, or a complete no-start situation—a failing Engine Control Module (ECM) is often the culprit. As the central computer of your vehicle, a faulty ECM can wreak havoc on drivability, fuel economy, and emissions. This isn’t just an inconvenience; it’s a critical component failure that needs a reliable solution.
This direct-fit replacement ECM, part number 12667189, is the definitive fix. We take the guesswork and dealership expense out of the equation. Before we ship it, our technicians will program the module with the latest GM-certified software, specifically matched to your vehicle’s unique VIN. This ensures that all factory parameters for your engine and transmission are perfectly calibrated, making installation a straightforward process for both professional mechanics and skilled DIYers.
From the Diagnostic Bay: The Case of the Intermittent Traverse
I remember a 2017 Chevy Traverse that came into my shop with a maddeningly intermittent stalling issue. The owner had already replaced the battery and alternator, but the problem persisted. No specific sensor codes were stored, only a generic P0606 (ECM Processor Fault) that would appear and disappear. After running a full diagnostic, we found that the ECM’s internal processor was failing under heat load. Once the engine compartment warmed up, the module would malfunction. Swapping in a pre-programmed ECM like this one resolved the issue instantly. The customer was back on the road the same day, without the lengthy and expensive diagnostic guesswork that often accompanies these failures.
Is Your Enclave Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Unexplained Check Engine Light with codes like P0601, P0606, or other internal processor faults.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Vehicle refuses to start, even with a good battery and starter.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Poor engine performance, hesitation, or misfires.
- ✔ Communication errors with diagnostic scan tools.
A Straightforward Guide to Installation
Installing your new 2017 Enclave ECM is a manageable job that can be done with basic hand tools. Following these steps will ensure a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the ECM: On the 2017 Enclave, the ECM is typically located behind the engine’s fan shroud. You may need to remove the shroud for access.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old ECM. Inspect the connectors for any signs of corrosion or damage and clean them if necessary.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the mounting hardware, as you will reuse it.
- Install the New Module: Mount the new, pre-programmed ECM in place and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses into the new module until they click. Reconnect the negative battery terminal.
- Perform Security Relearn: In many cases, you will need to perform a simple security relearn procedure (often called a ‘key-on, key-off’ cycle) to sync the new ECM with your vehicle’s anti-theft system. This procedure can typically be found in your owner’s manual or online and requires no special tools.
Verified Vehicle Compatibility
This module is a guaranteed fit for a wide range of GM vehicles. Please verify your make, model, and year against the list below. This unit is a direct replacement for part numbers 12667002, 12666070, and 12667189.
- ACADIA: 2017 (Limited models, VIN J 11th digit, behind fan shroud)
- CAPRICE: 2017 (3.6L)
- ENCLAVE: 2017 (behind fan shroud)
- EQUINOX: 2017 (LH engine compartment)
- IMPALA: 2017-2019
- REGAL: 2017 (LH engine compartment)
- TERRAIN: 2017 (LH engine compartment)
- TRAVERSE: 2017 (behind fan shroud)
- VERANO: 2017
- XTS: 2017-2019 (3.6L, VIN 3 8th digit, LFX)
Frequently Asked Questions
What do you mean by ‘programmed to my VIN’?
Before shipping, we use your Vehicle Identification Number (VIN) to load the module with the specific software and calibrations for your car’s engine, transmission, and options. This makes it a true plug-and-play part, eliminating the need for an expensive trip to the dealership for programming.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot ship the part until we receive your VIN.
Is this a difficult part to install myself?
For someone with basic mechanical skills and tools, this is a very manageable installation. The most important steps are disconnecting the battery and carefully handling the electrical connectors. The security relearn procedure is simple and requires no special equipment.
Will this 2017 Enclave ECM fix my specific problem?
This module is the correct solution for failures internal to the ECM itself, which cause the symptoms we’ve listed. While it resolves the most common issues, we always recommend a proper diagnosis to rule out other potential problems like faulty sensors or wiring.
Do I need to send my old ECM back?
This listing does not require a core return. You can keep or responsibly dispose of your old module.