Restore Your Enclave’s Performance and Reliability
If you’re dealing with a frustrating check engine light, erratic engine behavior, or a no-start condition in your 2017 Buick Enclave, a failing Engine Control Module (ECM) is a very likely culprit. As the central computer for your engine, the ECM manages everything from fuel mixture and ignition timing to transmission shifting. When it falters, the symptoms can be widespread and confusing. I’ve spent two decades diagnosing these exact issues, and I know how a faulty module can bring an otherwise healthy vehicle to a standstill.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle and high cost of dealership programming out of the equation. Simply provide your vehicle’s VIN during checkout, and our technicians will flash this module with the latest, most stable GM software specific to your Enclave. This ensures seamless communication with your vehicle’s other systems, restoring the smooth, efficient performance you expect. A properly functioning 2017 Enclave ECM is critical for engine health and fuel economy.
Case Study: A Tricky Diagnosis
A customer brought in a 2017 Chevy Traverse—which uses the same platform and ECM as the Enclave—with a complaint of intermittent stalling at stoplights and a persistent P0606 (ECM Processor Fault) code. They had already replaced the spark plugs and a coil pack with no success. After verifying power and ground to the ECM, my scan tool showed inconsistent data streams from the throttle position sensor, but only when the engine was hot. Experience told me the sensor wasn’t the issue; the ECM itself was failing internally under thermal stress. We installed a VIN-programmed ECM, and the problem was solved instantly. This highlights how a failing 2017 Enclave ECM can mimic other sensor failures, making accurate diagnosis key.
Common Signs of a Failing ECM
- ✔️ Persistent Check Engine Light (CEL) that won’t clear
- ✔️ Diagnostic Trouble Codes (DTCs) such as P0601, P0606, or U0100
- ✔️ Engine cranks but refuses to start
- ✔️ Noticeable drop in fuel mileage
- ✔️ Harsh or erratic automatic transmission shifting
- ✔️ Stalling, sputtering, or misfiring while driving
- ✔️ Communication errors with diagnostic scan tools
A Straightforward Guide to Installation
Replacing your ECM is a manageable job for a DIYer with basic tools. Because this unit arrives pre-programmed, you skip the most complicated step. The typical location for this module on the Enclave is behind the fan shroud.
- 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 mounted behind the engine’s cooling fan shroud. You may need to remove the shroud for access.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out. Never force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
- Install the New ECM: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Firmly plug the electrical connectors back into the new module until they click into place. Reconnect your negative battery terminal.
- Final Step: In many cases, a security relearn procedure is required for the vehicle to start. This simple procedure typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. Consult your owner’s manual for the specific procedure for your vehicle.
Verified Vehicle Compatibility
This module is a direct-fit replacement for original part numbers 12666070, 12667002, and 12667189. It is guaranteed to fit the following vehicles:
- ✔️ 2017 Buick Enclave (behind fan shroud)
- ✔️ 2017 Buick Regal (LH engine compartment)
- ✔️ 2017 Buick Verano (LH engine compartment)
- ✔️ 2017 Cadillac XTS (3.6L, VIN 3)
- ✔️ 2017 Chevrolet Caprice (3.6L)
- ✔️ 2017 Chevrolet Traverse (behind fan shroud)
- ✔️ 2017-2019 Chevrolet Impala
- ✔️ 2017 Chevrolet Equinox (LH engine compartment)
- ✔️ 2017 GMC Acadia (Limited, VIN J, behind fan shroud)
- ✔️ 2017 GMC Terrain (LH engine compartment)
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before shipment. We flash the module with the latest GM software using the VIN you provide, making it ready for installation right out of the box. You may need to perform a simple key/security relearn procedure, which does not require special tools.
What is a VIN and why do you need it?
The Vehicle Identification Number (VIN) is a unique 17-digit code for your car, found on your dashboard (driver’s side) or door jamb sticker. We need it to load the exact software and calibrations your specific vehicle requires for proper engine, transmission, and emissions system operation.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (e.g., codes P0601-P0606), then yes, this part will resolve the issue. However, you should always ensure other potential problems like faulty sensors or wiring have been ruled out for a complete repair.
Is this a brand new part?
This is a high-quality, fully tested replacement part that meets or exceeds original equipment specifications. It is professionally prepared and programmed to provide a reliable, long-term solution for your vehicle.
What if my part number isn’t listed?
This module replaces part numbers 12666070, 12667002, and 12667189. If your original module has a different number, please contact us with your VIN. We can verify compatibility or find the correct part for your application.