Is Your 2017 Buick Enclave Running Rough? The ECM Might Be the Culprit.
The Engine Control Module (ECM), often called the engine computer, is the central command center for your 2017 Buick Enclave’s engine. It meticulously manages critical functions like fuel injection, ignition timing, emissions systems, and transmission shifting to ensure optimal performance, fuel economy, and reliability. When this vital component begins to fail, it can trigger a cascade of confusing and frustrating problems, from a simple check engine light to a vehicle that won’t start at all. If you’re experiencing erratic engine behavior, you’ve come to the right place for a dependable solution.
This is a direct-fit replacement Engine Control Module for your vehicle, part number 12667002. To make your repair as simple as possible, we program the module specifically to your vehicle using the VIN you provide at checkout. This critical step ensures that the computer has the correct software and calibrations for your Enclave’s specific options and emissions requirements, straight from GM’s latest updates. This eliminates the need for expensive dealership programming, saving you time and money.
From the Diagnostic Bay
We had a 2017 Acadia (which uses the same platform as the Enclave) come into the shop with a persistent P0300 Random Misfire code. The owner had already replaced all the spark plugs, ignition coils, and even a fuel injector, but the check engine light kept coming back. After hours of chasing phantom vacuum leaks and testing sensors, we connected our diagnostic tool and monitored the live data from the ECM. We noticed the short-term fuel trim on Bank 1 was behaving erratically, commanding wild swings for no apparent reason. A quick check of the ECM’s internal processor performance confirmed our suspicion: the driver circuit for the Bank 1 injectors was failing internally. We installed a VIN-programmed ECM, performed the security relearn, and the misfire was gone for good. It’s a classic case where the problem isn’t the parts being controlled, but the controller itself.
Common Symptoms of a Failing 2017 Enclave ECM
- ✔ Check Engine Light: The most common sign is an illuminated Malfunction Indicator Lamp (MIL) with various trouble codes stored.
- ✔ Poor Engine Performance: You may notice a significant loss of power, hesitation during acceleration, or rough idling.
- ✔ Reduced Fuel Economy: A faulty ECM can’t properly manage the fuel-to-air ratio, leading to a noticeable drop in MPG.
- ✔ Engine Stalling or Misfiring: The engine may stall intermittently, especially when coming to a stop, or you might feel a distinct misfire or shudder.
- ✔ No-Start Condition: In severe cases of failure, the ECM may prevent the engine from starting at all by failing to control the fuel pump or ignition system.
- ✔ Transmission Shifting Issues: The ECM works with the Transmission Control Module (TCM), and a fault can cause harsh shifting, delayed engagement, or getting stuck in a gear.
- ✔ Communication Errors: Diagnostic scan tools may be unable to communicate with the ECM, indicating a major internal fault.
The Right Part for a Lasting Repair
Don’t let a faulty engine computer keep your vehicle off the road. This module is a reliable solution, ensuring that your engine’s brain is functioning exactly as the manufacturer intended. By providing us with your Vehicle Identification Number (VIN), you receive a module that is loaded with the most current GM software for your exact vehicle configuration. This unit is compatible with part numbers 12667002, 12666070, and 12667189, offering a wide range of coverage.
Installation is straightforward for a qualified technician. Once the new module is physically installed, a security relearn procedure may be required to sync the new ECM with your vehicle’s anti-theft system. This is a standard procedure that can be performed with the proper tools.
Vehicle Fitment:
This module is a confirmed fit for the following vehicles:
- 2017 Buick Enclave (located behind fan shroud)
- 2017 Chevrolet Caprice (3.6L)
- 2017 Chevrolet Traverse (located behind fan shroud)
- 2017-2019 Cadillac XTS (3.6L, VIN 3, LFX)
- 2017 GMC Acadia (Limited, VIN J, 11th digit)
- 2017 Buick Regal (LH engine compartment)
- 2017 Buick Verano
- 2017-2019 Chevrolet Impala
- 2017 Chevrolet Equinox (LH engine compartment)
- 2017 GMC Terrain (LH engine compartment)
Please verify your part number and vehicle compatibility before ordering. Providing your VIN is mandatory for us to complete the programming service and ship your part.
Frequently Asked Questions
What does the ECM do in my 2017 Enclave?
The Engine Control Module (ECM) is your vehicle’s main computer. It controls all aspects of engine operation, including fuel delivery, spark timing, variable valve timing, and emissions controls, to ensure your engine runs efficiently and powerfully.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to flash the ECM with the exact software and calibration file from GM for your specific vehicle. This ensures compatibility with your engine, transmission, and factory options, preventing performance issues and error codes.
Is this part ready to install out of the box?
The module comes programmed to your VIN and is ready for physical installation. However, most GM vehicles of this era require a security relearn procedure (also known as a key relearn or anti-theft relearn) after installation to allow the vehicle to start. This is a standard procedure for any professional mechanic.
Can a bad ECM cause transmission problems?
Yes. The ECM and Transmission Control Module (TCM) are in constant communication. If the ECM provides incorrect data about engine speed or load, it can cause poor shifting, hesitation, or error codes related to the transmission.
How do I find my original part number?
You can find the part number on a sticker attached to your original ECM. It is typically a silver or white label with the number printed in bold. The ECM on a 2017 Enclave is located behind the engine’s cooling fan shroud.