Is your 2017 GMC Terrain running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These frustrating issues often point to a failing Engine Control Module (ECM), the brain of your vehicle. Don’t let drivability problems disrupt your daily life. This is the direct, reliable solution to restore your vehicle’s performance and get you back on the road with confidence. We provide a professionally programmed ECM, flashed with the latest GM software specifically for your vehicle’s VIN, making the repair process as simple and cost-effective as possible.
Common Symptoms & Your Direct-Fit Solution
A failing ECM can cause a wide range of confusing symptoms. If you’re experiencing any of the following, this module is the solution you need:
- Persistent Check Engine Light (CEL) with codes like P0601, P0606, or other communication errors.
- Unexplained engine stalling or hesitation during acceleration.
- Rough or erratic idling.
- Noticeable decrease in fuel economy.
- Transmission shifting problems or harsh shifts.
- Complete no-start condition where the engine cranks but won’t turn over.
This unit is your answer, a Programmed 2017 GMC Terrain ECM that arrives ready for installation, bypassing the need for expensive dealership tools and programming fees.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s exact VIN and the latest GM software updates before it ships. This ensures perfect compatibility and a true plug-and-play installation experience.
- ✔ Restored Engine Performance: A correctly programmed module restores factory settings for fuel delivery, ignition timing, and emissions, bringing back the smooth and efficient performance you expect.
- ✔ Cost-Effective Repair: Avoid the high costs and scheduling delays associated with dealership service departments. This is the smart, affordable way to fix your vehicle correctly.
- ✔ Guaranteed Compatibility: This module is a direct replacement for part numbers 12667002, 12666070, and 12667189, ensuring a perfect physical and electronic fit.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: A customer with a 2017 Equinox faced a classic ECM failure—intermittent stalling at stoplights and a persistent P0606 code. Their local mechanic confirmed the ECM was faulty but quoted them over a thousand dollars for a dealer-supplied part and the required programming. Instead, they ordered this Programmed 2017 GMC Terrain ECM (which also fits their Equinox). We flashed it to their VIN, shipped it out, and their mechanic installed it in under 30 minutes. The vehicle started immediately and has run flawlessly ever since, saving them significant time and money.
Guaranteed Vehicle Fitment:
This computer is a confirmed fit for the following vehicles with the specified options:
- CAPRICE 2017 Electronic Control Module; 3.6L
- TRAVERSE 2017 Electronic Control Module; (behind fan shroud)
- XTS 2017-2019 Electronic Control Module; (3.6L), VIN 3 (8th digit, opt LFX)
- ACADIA 2017 Electronic Control Module; VIN J (11th digit, Limited), (behind fan shroud)
- ENCLAVE 2017 Electronic Control Module; (behind fan shroud)
- REGAL 2017 Electronic Control Module; (LH engine compartment)
- VERANO 2017 Electronic Control Module
- IMPALA 2017-2019 Electronic Control Module
- EQUINOX 2017 Electronic Control Module; (LH engine compartment)
- TERRAIN 2017 Electronic Control Module; (LH engine compartment)
Frequently Asked Questions
Do I need to do any programming or flashing myself?
Absolutely not. The main benefit of our service is that we handle all the programming for you. We use your vehicle’s VIN to load the correct, updated software before we ship the part. It arrives ready to be installed.
Where do I provide my vehicle’s VIN?
You can add your VIN in the ‘notes’ section during checkout. If you forget, don’t worry! We will contact you via email after your purchase to request the VIN, as we cannot ship the module without it.
Is this a difficult part to install?
For someone with basic mechanical skills, the physical replacement is straightforward as the ECM is typically in an accessible location in the engine bay. However, some vehicles may require a security ‘relearn’ procedure after installation, which can often be done without special tools. We recommend consulting a service manual for your specific vehicle or having a qualified mechanic perform the installation.
What if my original part number is slightly different?
The part numbers listed (12667002, 12666070, 12667189) are often interchangeable. The most important factor is programming the module to your specific VIN. If you are unsure, please contact us with your VIN and we can confirm compatibility for you.
How do you get the correct software for my car?
We use your VIN to access the official General Motors service databases. This allows us to download the exact factory software file that your vehicle was built with, including any subsequent updates released by GM for improved performance and reliability.