Restore Peak Performance to Your 2017 Equinox
Is your Chevrolet Equinox or other GM vehicle suddenly stalling, running rough, or refusing to start? A faulty Engine Control Module (ECM) is often the culprit behind these frustrating and unpredictable issues. As a technician with over two decades of experience, I’ve seen firsthand how a failing ECM can mimic a dozen other problems, leading to expensive and incorrect repairs. This pre-programmed ECM, part number 12666070, is the definitive solution to get your vehicle running reliably again.
The biggest hurdle in replacing an ECM has always been the expensive and complex programming required at a dealership. We eliminate that step entirely. When you purchase this module, we use your vehicle’s VIN to flash it with the very latest, most stable software updates directly from GM. This isn’t just a replacement; it’s a restoration of your vehicle’s core logic, ensuring optimal fuel economy, emissions compliance, and engine performance. Your 2017 Equinox ECM will arrive at your door ready for a straightforward installation, saving you time, money, and a trip to the dealer.
From the Diagnostic Bay
I remember a 2017 GMC Terrain (which uses the same ECM) that came into my shop after visiting two other garages. The owner was frustrated with an intermittent no-start condition and a random P0606 (ECM/PCM Processor Fault) code. The other shops had replaced the battery and alternator to no avail. After confirming stable power and ground to the module, my diagnostics pointed directly to an internal ECM failure. We installed one of our VIN-programmed modules, performed the quick security relearn, and the problem was solved permanently. The customer was back on the road in under an hour, avoiding hundreds more in dealership diagnostic fees.
Common Signs of a Failing Engine Computer
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0606, or U-series communication codes.
- ✔ Engine stalling, misfiring, or running rough.
- ✔ Complete no-start or intermittent starting problems.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Issues with automatic transmission shifting.
- ✔ Apparent loss of power and acceleration.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to power down.
- ✔ Locate the ECM: On the 2017 Equinox and Terrain, the ECM is typically found in the engine compartment on the driver’s side (LH). For other models, it may be behind the fan shroud.
- ✔ Disconnect Connectors: Carefully release the locking tabs and disconnect all wiring harnesses from the old ECM. Inspect the connectors for any corrosion or damage.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed ECM and securely reconnect all wiring harnesses. Ensure they click into place.
- ✔ Reconnect Battery: Reattach the negative battery terminal.
- ✔ Perform Security Relearn: You may need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. This allows the new 2017 Equinox ECM to sync with your vehicle’s anti-theft system.
Guaranteed Vehicle Fitment
This module is a direct replacement for part numbers 12667002, 12666070, and 12667189. It is guaranteed to fit the following vehicles:
- 2017 Chevrolet Caprice (3.6L)
- 2017 Chevrolet Traverse (Behind fan shroud)
- 2017-2019 Cadillac XTS (3.6L, VIN 3)
- 2017 GMC Acadia (Limited, VIN J, Behind fan shroud)
- 2017 Buick Enclave (Behind fan shroud)
- 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)
Don’t let a faulty computer keep you off the road. This is the most reliable and efficient way to fix your vehicle’s core electronic issues. By installing our pre-programmed 2017 Equinox ECM, you’re not just replacing a part—you’re restoring your vehicle’s brain.
What exactly is VIN programming?
What exactly is VIN programming?
VIN programming is the process of loading your vehicle’s unique Vehicle Identification Number (VIN) and the latest GM-approved software onto the ECM. This ensures the module communicates perfectly with all other systems in your specific car, from the transmission to the anti-theft system, for flawless, out-of-the-box operation.
Do I need to do anything after I install it?
In most cases, you will need to perform a simple security relearn procedure, which can be done without any special tools. We include instructions for this common procedure. Once that’s done, you’re ready to drive.
How 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 reply to your order confirmation email. We cannot ship the module until we receive your VIN.
How can I be sure this fits my vehicle?
Please check the fitment list on this page. This ECM is a direct replacement for part numbers 12666070, 12667002, and 12667189. As long as your vehicle is on the list and requires one of these parts, it is a guaranteed match.