Restore Your Vehicle’s Performance and Reliability
Is your vehicle suffering from a persistent Check Engine Light, erratic engine behavior, or poor fuel economy? These are classic signs of a failing Engine Control Module (ECM), the computer that serves as your engine’s brain. When it malfunctions, it can cause a host of frustrating and performance-robbing issues. This direct-fit ECM, part number 12667002, is the definitive solution to get your vehicle running smoothly and efficiently again.
As a seasoned technician, I’ve seen firsthand how a faulty ECM can lead to expensive misdiagnoses. Owners often replace perfectly good sensors and parts, only to find the root cause was the computer all along. We eliminate the guesswork and the hassle. This module isn’t just a part; it’s a complete service. We program it with the latest GM-certified software specifically for your vehicle using the VIN you provide. This means it arrives at your door ready for a straightforward installation, saving you a costly trip to the dealership for programming.
From the Diagnostic Bay: The Intermittent Stall Mystery
A customer brought in a 2017 Chevy Traverse a few months back. The complaint was a tricky one: it would randomly stall at stoplights, but not every time. No consistent codes were stored, just a few random communication errors that would clear themselves. Two other shops had already replaced the fuel pump and a camshaft sensor with no success. After hooking up my scan tool and monitoring live data, I noticed the 5-volt reference signal would occasionally dip for a split second—just enough to cause a hiccup. This pointed directly to an internal fault in the ECM. We installed a VIN-programmed module just like this one, and the problem was solved instantly. It’s a perfect example of how a failing 2017 Caprice ECM (or in this case, a compatible Traverse ECM) can create phantom issues that are nearly impossible to trace without experience.
Signs Your Engine’s Brain is Failing
A failing ECM can manifest in various ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. Look out for these common symptoms and diagnostic trouble codes (DTCs):
- ✔ Check Engine Light is illuminated
- ✔ Engine stalling, stuttering, or misfiring
- ✔ Noticeable decrease in fuel efficiency
- ✔ Vehicle won’t start or has trouble starting
- ✔ Shifting problems with the automatic transmission
- ✔ Stored diagnostic codes such as P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault)
A Straightforward Guide to Installation
Installing your pre-programmed 2017 Caprice ECM is a manageable job for a confident DIYer or any professional mechanic. Since the programming is done for you, no special scan tools are required for the initial setup.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On many of these GM models, the ECM is found in the engine compartment. Common locations include the driver’s side of the engine bay (Equinox, Terrain, Regal) or behind the fan shroud (Traverse, Enclave, Acadia).
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount the new, pre-programmed ECM in the same location and secure it with the bolts. Reconnect the wiring harnesses, ensuring they click securely into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Security Relearn (If Needed): In some cases, a simple security relearn procedure may be necessary. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your vehicle’s service manual for specific instructions. Start the engine and verify the Check Engine Light is off.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12667002, 12666070, and 12667189. It is guaranteed to fit the following vehicles with the specified options. Please provide your VIN upon checkout to ensure perfect programming.
- 2017 Chevrolet Caprice (3.6L)
- 2017 Chevrolet Traverse (Behind fan shroud)
- 2017-2019 Cadillac XTS (3.6L, VIN 3, LFX)
- 2017 GMC Acadia (VIN J, Limited, Behind fan shroud)
- 2017 Buick Enclave (Behind fan shroud)
- 2017 Buick Regal (LH engine compartment)
- 2017 Buick Verano
- 2017-2019 Chevrolet Impala
- 2017 Chevrolet Equinox (LH engine compartment)
- 2017 GMC Terrain (LH engine compartment)