Is Your Buick Regal Running Rough? The Problem Might Be Its Brain.
If your 2017 Regal is suddenly stalling, hesitating, or throwing a check engine light that just won’t go away, the issue often points to the very core of its operations: the Engine Control Module (ECM). As a technician with over two decades of experience under the hood, I’ve seen how a failing ECM can turn a reliable car into a source of constant frustration. It controls everything from fuel mixture to spark timing, and when it falters, the symptoms can be widespread and confusing.
Real-World Diagnostic Story: “A customer’s 2017 Regal came in last week with these exact symptoms: a random P0300 misfire code and terrible fuel economy. They had already replaced plugs and coils with no success. After hooking up my diagnostic scanner and monitoring live data, I noticed the short-term fuel trim on bank 1 was wildly inconsistent. This pointed away from a simple mechanical issue and toward the command center itself. We confirmed the injector driver circuit within the original ECM was failing. Swapping in a properly programmed module like this one solved the problem instantly. The car ran smoothly, and the fuel trims stabilized immediately.”
The Direct Solution: A VIN-Programmed 2017 Regal ECM
Don’t waste time and money chasing down the wrong parts. This Engine Control Module is the definitive solution for a faulty computer. We take the guesswork out of the repair by programming the module specifically to your vehicle’s VIN before it ever leaves our facility. This ensures it communicates perfectly with your car’s other systems, just like the original part did from the factory.
- โ VIN-Specific Programming Included: We flash the module with the latest GM-certified software for your exact vehicle. No dealer visit needed for programming.
- โ Resolves Common Failure Points: Effectively corrects issues like no-start conditions, erratic idling, poor fuel mileage, and persistent diagnostic trouble codes (DTCs).
- โ Guaranteed Compatibility: This module is a direct replacement for part numbers 12667002, 12666070, and 12667189.
- โ Restores Peak Performance: Get your engine’s efficiency, power, and reliability back to factory specifications.
Plug-and-Play Installation: Get Back on the Road Fast
Replacing the ECM on your Regal is a straightforward job you can do in your own driveway. All you need are basic hand tools.
- Safety First: Always disconnect the negative terminal from your car’s battery before working on any electronic components.
- Locate the Module: On the 2017 Regal, the ECM is found in the engine compartment on the left-hand (driver’s) side.
- Disconnect the Harnesses: Carefully release the locking tabs on the wiring connectors and pull them straight out. Never force them, as this can damage the pins.
- Remove the Old ECM: Unbolt the mounting hardware holding the original module in place and remove it from the vehicle.
- Install the New ECM: Mount your new, pre-programmed module in the same location and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new ECM until they click into place. Reconnect the negative battery terminal.
- Final Check: In some cases, a security relearn procedure may be required, which typically involves cycling the key. However, our programming often makes this step unnecessary. Start the vehicle and let it idle for a few minutes to confirm the repair is complete.
Vehicle Fitment Information
This module is a confirmed fit for a wide range of GM vehicles. Please verify your model and options below:
- Buick Regal: 2017 (LH engine compartment)
- Buick Enclave: 2017 (behind fan shroud)
- Buick Verano: 2017
- Cadillac XTS: 2017-2019 (3.6L, VIN 3)
- Chevrolet Caprice: 2017 (3.6L)
- Chevrolet Traverse: 2017 (behind fan shroud)
- Chevrolet Impala: 2017-2019
- Chevrolet Equinox: 2017 (LH engine compartment)
- GMC Acadia: 2017 (Limited, VIN J, behind fan shroud)
- GMC Terrain: 2017 (LH engine compartment)
After purchase, simply provide us with your vehicle’s VIN, and we’ll handle the rest. Restore your vehicle’s health and drive with confidence again.