Restore Your Vehicle’s Core Performance and Reliability
Is your 2017 Chevrolet Equinox or other GM vehicle experiencing frustrating issues like stalling, erratic shifting, a persistent check engine light, or a complete no-start condition? These are often hallmark signs of a failing Engine Control Module (ECM), the central computer responsible for managing your engine’s performance. When the ECM falters, it can disrupt everything from fuel delivery and spark timing to transmission operation, leaving you with an unreliable vehicle and costly diagnostic headaches. In my 20+ years in the shop, I’ve seen how a faulty ECM can mimic a dozen other problems, but replacing it is often the definitive fix.
This isn’t just a replacement part; it’s a complete solution. We provide a genuine GM ECM, part number 12667189 (also compatible with 12667002 and 12666070), that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures seamless communication with your vehicle’s other electronic systems. We flash it with the latest, most stable software updates directly from GM, which often correct underlying factory bugs that may have contributed to the original failure. By installing our pre-programmed 2017 Equinox ECM, you are not only replacing a failed component but also ensuring your engine operates with the most efficient and reliable software available.
From the Diagnostic Bay: A Tricky Intermittent Stall
A customer brought in a 2017 GMC Terrain with a complaint that stumped two other shops: it would randomly stall at stoplights, but with no consistent check engine codes. It ran perfectly otherwise. We couldn’t find any vacuum leaks or fuel pressure drops. On a hunch, I hooked up a lab scope to the 5-volt reference circuit supplied by the ECM to the throttle body and MAP sensor. After letting it idle for nearly 30 minutes, we finally saw it—the 5V signal would momentarily crash to zero, causing the stall, and then recover instantly. The ECM was internally shorting but not long enough to set a hard fault code. Replacing the ECM with a properly programmed unit solved the problem for good. It’s a classic example of how ECM failures can be elusive without hands-on experience.
Is Your Vehicle Showing These Symptoms?
- ✔️ Persistent Check Engine Light (CEL) that won’t clear.
- ✔️ Common Diagnostic Trouble Codes (DTCs) like P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or U-series communication codes.
- ✔️ Unexplained drops in fuel economy or engine power.
- ✔️ Engine stalling, stuttering, or misfiring intermittently.
- ✔️ Harsh or erratic automatic transmission shifting.
- ✔️ Complete no-start condition where the engine cranks but will not fire up.
- ✔️ Problems with other electronic systems, like anti-theft or throttle control.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all system capacitors to discharge.
- ✔ Locate the ECM: On the 2017 Equinox and Terrain, the ECM is typically found in the left-hand (driver’s side) of the engine compartment. On other models like the Traverse or Acadia, it may be behind the fan shroud. Consult a service manual if you’re unsure.
- ✔ Disconnect and Remove: Carefully unplug the electrical harness connectors from the old ECM. Press the release tabs firmly to avoid damaging them. Once disconnected, unbolt the module from its mounting bracket and remove it from the vehicle.
- ✔ Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely tighten the bolts. Reconnect the electrical harnesses, ensuring they click firmly into place.
- ✔ Reconnect Power: Reattach the negative battery terminal. The vehicle may require a security relearn or idle relearn procedure, which can often be completed by turning the key to the ‘ON’ position for 10-15 minutes before starting the engine.
Verified Vehicle Compatibility
This module is a direct-fit replacement for the following vehicles and configurations. We program it specifically for your VIN to guarantee compatibility.
- ✔️ 2017 Chevrolet Caprice: with 3.6L engine
- ✔️ 2017 Chevrolet Traverse: located behind fan shroud
- ✔️ 2017-2019 Cadillac XTS: with 3.6L engine (VIN 3, LFX)
- ✔️ 2017 GMC Acadia: Limited models (VIN J, 11th digit), located behind fan shroud
- ✔️ 2017 Buick Enclave: located behind fan shroud
- ✔️ 2017 Buick Regal: located in LH engine compartment
- ✔️ 2017 Buick Verano
- ✔️ 2017-2019 Chevrolet Impala
- ✔️ 2017 Chevrolet Equinox: located in LH engine compartment
- ✔️ 2017 GMC Terrain: located in LH engine compartment
By ordering this pre-programmed 2017 Equinox ECM, you’re choosing a reliable, cost-effective solution that gets your vehicle back on the road without the high costs and scheduling delays of a dealership visit. Trust our expertise to deliver a part that works right out of the box.
Frequently Asked Questions
Do I need to do any programming after I receive it?
No. This ECM comes fully programmed to your vehicle’s VIN. It is ready for installation right out of the box. In some cases, a simple security or idle relearn procedure may be necessary, which does not require any special tools.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship the module until we receive this information, as it is essential for the programming process.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (like codes P0601 or P0606), then yes, this will resolve the issue. However, you should always ensure that the root cause of the problem is the ECM and not a faulty sensor or wiring issue.
Is this compatible with other part numbers?
Yes, this ECM, part number 12667189, is a direct replacement for part numbers 12667002 and 12666070, offering the same form, fit, and function.