Restore Your Vehicle’s Performance and Reliability
Is your Chevrolet Equinox or other GM vehicle acting erratically? Experiencing frustrating issues like a persistent Check Engine Light, poor fuel economy, stalling, or rough shifting? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your engine’s performance. When the ECM falters, it can feel like your vehicle has lost its mind. This isn’t just an inconvenience; it affects safety, fuel costs, and your daily confidence on the road.
We provide a dependable and straightforward solution. This ECM, part number 12667002, is meticulously prepared and programmed with the latest official GM software updates specifically for your vehicle. By providing your Vehicle Identification Number (VIN) at checkout, you receive a module that is truly plug-and-play. This eliminates the need for an expensive trip to the dealership for programming, saving you significant time and money. Installing our 2017 Equinox ECM is the most efficient way to get your vehicle running smoothly again.
From the Diagnostic Bay: The Phantom Misfire Case
A few months back, a 2017 Traverse came into my shop with a problem that had stumped two other mechanics. The owner reported random, intermittent misfires (P0300 code) that wouldn’t point to a specific cylinder. They had already replaced plugs, coils, and even injectors. The engine would run fine for days, then suddenly start stumbling at a stoplight. After hooking up my diagnostic scope, I noticed the injector pulse width signals were becoming erratic, but only after the engine was fully warmed up for 30+ minutes. This pointed away from the components and toward the component controller—the ECM. Heat soak was causing an internal fault in the ECM’s driver circuit. We installed a VIN-programmed ECM, and the phantom misfire was gone for good. It’s a perfect example of how a failing computer can mimic a mechanical failure.
Is Your GM Vehicle Showing These Red Flags?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer needs attention:
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U0100.
- ✔ Unexplained drop in fuel efficiency.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Hard starting or failure to start at all.
- ✔ Rough or erratic automatic transmission shifting.
- ✔ Loss of communication with other vehicle modules.
Your Straightforward Installation Guide
With the programming already handled by our experts, the physical swap is a manageable job for a DIYer with basic tools. While the exact location varies by model (check your service manual), the general process is consistent. Here’s a typical workflow for replacing your 2017 Equinox ECM:
- Safety First: Always 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, it’s 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.
- Disconnect Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. It’s usually held in place by a few small bolts or nuts.
- Install the New Module: Mount your new, pre-programmed ECM securely onto the bracket. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reconnect Battery: Reattach the negative battery terminal. The vehicle may require a security relearn procedure, which often involves turning the key to the ‘ON’ position for 10-15 minutes. Check your owner’s manual for specific instructions.
Verified Fitment For These GM Models
This module is a direct-fit replacement for several vehicles and part numbers, ensuring broad compatibility. It is a reliable solution for the following models, cross-referencing with part numbers 12667002, 12666070, and 12667189.
- 2017 Cadillac XTS: (3.6L, VIN 3)
- 2017-2019 Cadillac XTS: (3.6L, VIN 3, opt LFX)
- 2017 Chevrolet Caprice: (3.6L)
- 2017 Chevrolet Equinox: (LH engine compartment)
- 2017-2019 Chevrolet Impala
- 2017 Chevrolet Traverse: (Behind fan shroud)
- 2017 GMC Acadia: (VIN J, Limited, behind fan shroud)
- 2017 GMC Terrain: (LH engine compartment)
- 2017 Buick Enclave: (Behind fan shroud)
- 2017 Buick Regal: (LH engine compartment)
- 2017 Buick Verano
Why is VIN programming so important?
Your vehicle’s VIN is tied to its specific factory options, security system (anti-theft), and emissions calibration. Programming the ECM with your VIN ensures it communicates perfectly with all other modules in your car, just like the original part from the factory. This avoids compatibility issues and warning lights.
Is any additional programming required after installation?
No. This ECM arrives pre-programmed and ready for installation. In some cases, a simple, tool-free “security relearn” or “idle relearn” procedure may be necessary, which you can typically do yourself. Instructions are widely available online or in your owner’s manual.
Will this fix my specific problem?
This part is designed to correct issues directly caused by a faulty ECM, such as internal processor faults (P0606), memory errors (P0601), or failed driver circuits. While it resolves the most common electronic engine problems, you should always ensure your diagnosis is accurate and that mechanical parts (like sensors or wiring) are in good condition.
Where is the ECM located on my 2017 Equinox?
On the 2017 Chevrolet Equinox, the Engine Control Module is conveniently located in the engine bay on the driver’s side (left-hand side), making it relatively easy to access for replacement.
What happens if I don’t provide my VIN?
Providing your VIN is mandatory for this purchase. We cannot program or ship the module without it, as the part would not function correctly in your vehicle. This step is critical to ensuring a successful repair.