Restore Your Vehicle’s Core Performance and Reliability
Is your GM vehicle suffering from frustrating issues like a persistent Check Engine Light, erratic engine behavior, stalling, or a no-start condition? As a technician with over two decades of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can disrupt your entire vehicle’s operation. It’s the brain of your engine, and when it falters, everything from fuel delivery to spark timing is compromised. This isn’t just an annoyance; it affects your vehicle’s safety, fuel economy, and drivability. We offer a dependable, straightforward solution: a professionally programmed ECM, ready for installation right out of the box.
This module, part number 12667189, is meticulously programmed with the latest official GM software updates specifically for your vehicle’s Vehicle Identification Number (VIN). This critical step ensures seamless communication with all other onboard systems, eliminating the need for expensive dealership programming or specialized scan tools. By providing us with your VIN at checkout, you receive a component that is truly plug-and-play, designed to restore your engine’s original performance and efficiency.
From the Diagnostic Bay: The Case of the Intermittent Traverse
A few months back, a 2017 Chevy Traverse was towed to my shop. The owner was at his wit’s end. The SUV would randomly refuse to start, but after sitting for an hour, it would fire right up as if nothing was wrong. There were no consistent trouble codes, just a generic U0100 (Lost Communication with ECM/PCM) that would pop up sporadically. After hours of checking wiring harnesses and power grounds, we finally isolated the fault to an internal failure in the ECM that was heat-sensitive. The dealership quoted him over a thousand dollars for a new module plus programming. Instead, we ordered a VIN-programmed ECM just like this one. The installation took less than 30 minutes, and the problem was solved permanently for a fraction of the cost. It’s a perfect example of how the right part can save you time, money, and a massive headache.
Why Choose Our Programmed 2017 Caprice ECM?
When you’re dealing with a critical component like the ECM, you need a part you can trust. A faulty or improperly programmed module can lead to a cascade of other issues. Our solution is built on precision and reliability. We handle the complex programming so you can focus on the simple installation. This is the ideal fix for both seasoned DIY mechanics and professional repair shops looking for an efficient and dependable parts source.
Common Signs of a Failing Engine Computer
If your vehicle is experiencing any of the following, a failing ECM could be the culprit. A proper diagnosis is always recommended, but these are classic symptoms I’ve seen hundreds of times in the shop.
- ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine stalling, stuttering, or misfiring, especially under load.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Unexplained loss of power and poor acceleration.
A Straightforward Guide to Installation
Installing your new ECM is a manageable job for most DIYers with basic tools. Always consult a vehicle-specific repair manual if you are unsure about any step.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the ECM: The location varies by model. On many of these vehicles, it’s found in the engine compartment (e.g., behind the fan shroud or on the LH side). Refer to your owner’s manual or a repair guide for the exact location.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and disconnect them from the old ECM. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the mounting hardware that secures the ECM to the vehicle and remove the old unit.
- Install the New ECM: Mount your new, pre-programmed ECM in the same location and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses back into the new module, ensuring they click securely into place. Reconnect the negative battery terminal.
- Final Steps: Some vehicles may require a security or crankshaft position sensor relearn procedure after installation, which can often be done without special tools. Check your vehicle’s specific requirements. Start the engine and check for proper operation.
Verified Vehicle Compatibility
This ECM is a direct replacement for part numbers 12667002, 12666070, and 12667189. It is guaranteed to fit the following vehicles with the specified options:
- 2017 Chevrolet Caprice (with 3.6L engine)
- 2017 Chevrolet Traverse (ECM located behind fan shroud)
- 2017-2019 Cadillac XTS (with 3.6L LFX engine, VIN 3)
- 2017 GMC Acadia (Limited models, VIN J – 11th digit)
- 2017 Buick Enclave (ECM located behind fan shroud)
- 2017 Buick Regal (ECM located in LH engine compartment)
- 2017 Buick Verano
- 2017-2019 Chevrolet Impala
- 2017 Chevrolet Equinox (ECM located in LH engine compartment)
- 2017 GMC Terrain (ECM located in LH engine compartment)
Frequently Asked Questions
Do I need to do any programming myself?
No. We flash the module with the latest GM software using the VIN you provide. It arrives ready to install, saving you a trip to the dealer.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact software and calibrations your specific vehicle requires for proper engine management, transmission control, and emissions compliance.
Is this a difficult part to replace?
For most individuals with basic mechanical skills, this is a straightforward replacement. The most important part is ensuring the battery is disconnected and the electrical connectors are handled carefully. Please see our installation guide above.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal failure of the ECM (like codes P0601-P0606), then this part is the correct fix. It’s essential to have your vehicle properly diagnosed to confirm the ECM is the root cause of the problem.
What if my part number is slightly different?
This module is a direct replacement for part numbers 12667002, 12666070, and 12667189. If your part number is listed here, this module will work perfectly for your application.