Is Your GMC Terrain Running Rough or Showing a Check Engine Light?
A faulty Engine Control Module (ECM) can be the source of countless frustrating and seemingly random issues in your 2017 GMC Terrain. From a no-start condition that leaves you stranded to poor fuel economy that drains your wallet, a failing engine computer compromises your vehicle’s reliability and your peace of mind. This pre-programmed Engine Control Module is the simple, direct, and dependable solution to get your Terrain back on the road and running exactly as it should.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing ECM is a likely culprit. This unit is the definitive fix for these common problems:
- Persistent Check Engine Light (CEL)
- Engine stalling, stumbling, or misfiring
- Drastic decrease in fuel mileage
- Transmission shifting erratically or harshly
- Vehicle won’t start, even with a good battery and starter
- Diagnostic trouble codes (DTCs) related to the processor, such as P0606
Instead of paying for expensive diagnostic time and a costly programming service at a dealership, this module provides a streamlined solution. We handle the complex programming for you, delivering a part that is truly ready for installation. For a reliable fix, trust a correctly programmed 2017 GMC Terrain ECM 12667002.
Features & Benefits
- ✔ Ready for Installation: Arrives fully programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership tools or additional flashing services.
- ✔ Optimized Performance: Flashed with the latest, most stable software updates from GM to ensure peak fuel efficiency, smooth operation, and proper emissions compliance.
- ✔ Fixes Frustrating Issues: The definitive solution for common ECM-related problems like check engine lights, stalling, communication errors, and poor running conditions.
- ✔ Guaranteed Compatibility: A direct-fit replacement for part numbers 12667002, 12666070, and 12667189, ensuring a perfect match for your vehicle.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: The Plug-and-Play Difference
We recently worked with a customer whose 2017 Terrain was plagued with intermittent stalling and a check engine light that three different shops couldn’t solve. The dealership quoted them over $1,200 for a new module and programming. They ordered our pre-programmed 2017 GMC Terrain ECM 12667002, and their local mechanic installed it in under an hour. The vehicle started immediately, the check engine light was gone, and the stalling issues vanished completely. This is the power of a part that’s prepared correctly before it ever leaves our facility—it saves you time, money, and headaches.
Frequently Asked Questions
Do I need to have this ECM programmed by a dealer?
No. This is the biggest benefit of our service. We program the module to the specific VIN you provide during checkout. It will arrive at your door ready to be installed, with no additional programming required.
What information do you need from me?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to load the correct software and ensure perfect compatibility with your 2017 GMC Terrain.
Is this part difficult to install?
The ECM is typically located in the engine compartment. For a qualified mechanic or an experienced DIYer, the physical replacement is straightforward. Since the programming is already done, it becomes a simple plug-and-play installation. We always recommend disconnecting the battery before starting the job.
How do I know for sure that my ECM is the problem?
While symptoms like a check engine light, stalling, or a no-start condition strongly point to the ECM, it’s always best to have a professional diagnosis performed. This ensures you are replacing the correct part and not overlooking other potential issues with sensors or wiring.
Will this fit other vehicles besides the 2017 Terrain?
Yes, this ECM is compatible with a range of GM vehicles from that era, including the Acadia, Traverse, Enclave, and Impala. Please check the fitment list on this page to confirm it is the correct part for your specific make and model.