Restore Peak Performance to Your Chevrolet Traverse
Is your 2017 Traverse suffering from a persistent check engine light, erratic engine behavior, or a frustrating no-start condition? A failing Engine Control Module (ECM) is often the hidden culprit behind these complex issues. As the brain of your vehicle’s engine, the ECM governs everything from fuel injection and ignition timing to transmission shifting. When it falters, the symptoms can be confusing and lead to costly, incorrect repairs. This replacement ECM, part number 12667002, is the definitive solution to get your vehicle running reliably again.
We take the guesswork and high dealership costs out of the equation. Each module is professionally programmed with the latest official GM software updates, tailored specifically to your vehicle using its VIN. This ensures perfect compatibility and restores the original factory performance and efficiency. You’re not just buying a part; you’re getting a complete, ready-to-install solution for your 2017 Traverse ECM problems.
A Technician’s Notebook: The Misleading Stumble
A customer brought in a 2017 Acadia—which uses the same platform and ECM as the Traverse—with an intermittent stalling issue that was driving them crazy. Two other shops had already replaced the fuel pump and a camshaft sensor, but the problem persisted. When I connected my scan tool, I saw no hard fault codes, but monitoring live data revealed something critical: the ECM’s internal processor voltage would momentarily dip just before a stall. This isn’t something a basic code reader picks up. It was a classic sign of internal ECM failure. We installed a VIN-programmed module, and the vehicle has run flawlessly ever since. It’s a powerful reminder that for complex electrical issues, the root cause is often the central computer itself.
Common Signs of a Failing Engine Computer
If you’re experiencing any of the following, a faulty ECM could be the cause. In my 20+ years of diagnostic work, these are the most frequent indicators I’ve seen linked directly to a failing module:
- âś” Check Engine Light (CEL) is on with codes pointing to internal processor failure (e.g., P0601, P0606, P060A).
- âś” Engine cranks but refuses to start.
- âś” Unexplained drops in fuel economy.
- âś” Rough idling, stalling, or hesitation during acceleration.
- âś” Loss of communication codes (U-codes) from other modules.
- âś” Seemingly random misfire codes that don’t resolve with new plugs or coils.
A Straightforward Guide to Installation
Replacing the 2017 Traverse ECM is a manageable job for a DIYer with basic tools. The key is our pre-programming service, which eliminates the need for expensive dealer equipment.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for capacitors to discharge.
- Locate the ECM: On the 2017 Traverse, the ECM is typically located behind the engine’s cooling fan shroud. You may need to remove the shroud for access.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs, so be gentle. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed ECM into place. Reconnect the wiring harnesses, ensuring they click securely into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Security Relearn: Your vehicle may require a simple key-cycle security relearn procedure to recognize the new ECM. This procedure typically takes 10-15 minutes and does not require special tools. We include instructions for this process.
Will This Fit My Vehicle?
This module is a direct-fit replacement for several GM vehicles and is guaranteed to be compatible if your original part number is 12667002, 12666070, or 12667189. Please verify your part number before ordering.
- ACADIA 2017 (VIN J, Limited)
- CAPRICE 2017 (3.6L)
- ENCLAVE 2017
- EQUINOX 2017
- IMPALA 2017-2019
- REGAL 2017
- TERRAIN 2017
- TRAVERSE 2017
- VERANO 2017
- XTS 2017-2019 (3.6L, VIN 3)
Frequently Asked Questions About the 2017 Traverse ECM
Do I really need to provide my VIN?
Do I really need to provide my VIN?
Yes, absolutely. Providing your Vehicle Identification Number (VIN) is mandatory. We use it to program the ECM with the correct software and calibrations for your specific vehicle options. This step is critical for ensuring plug-and-play functionality and avoiding drivability problems.
Is any additional programming required after installation?
No, the main engine programming is completely handled by us before shipping. However, you will likely need to perform a simple security relearn procedure (also known as a Passlock or anti-theft relearn) so the vehicle recognizes the new module. This can be done at home with just your key and takes about 10-15 minutes. Instructions are provided.
What is the difference between an ECM, ECU, and PCM?
The terms are often used interchangeably. ECM (Engine Control Module) specifically manages engine functions. ECU (Electronic Control Unit) is a more generic term. PCM (Powertrain Control Module) typically controls both the engine and the transmission. For this specific GM application, it is referred to as an ECM.
Will this fix my specific check engine light codes?
This module is a guaranteed fix for internal processor and memory failure codes (like P0601 or P0606). While it can resolve many other issues, it’s crucial to properly diagnose your vehicle first. A faulty sensor or wiring problem can sometimes mimic ECM failure. If you are unsure, we recommend consulting a professional mechanic.