Restore Peak Performance to Your GM Vehicle
Dealing with a frustrating check engine light, poor fuel economy, or a car that just won’t start? A failing Engine Control Module (ECM) is often the culprit. As the central computer for your engine, it controls everything from fuel mixture and ignition timing to transmission shifting. When it falters, the entire vehicle suffers. This isn’t just an inconvenience; it can lead to failed emissions tests and leave you stranded. We provide a reliable, straightforward solution to get you back on the road with confidence.
This is a genuine GM Engine Control Module, part number 12667189, which also replaces part numbers 12667002 and 12666070. The critical advantage we offer is our professional programming service. Before we ship the module, we flash it with the latest, most stable GM software updates, specifically matched to your vehicle’s VIN. This eliminates the need for expensive dealership programming or specialized tools, turning a complex repair into a manageable one for both seasoned mechanics and determined DIYers. By installing our pre-programmed 2017 Verano ECM, you’re not just replacing a part; you’re ensuring your vehicle’s engine management system is operating exactly as the manufacturer intended.
Case Study: A Tricky Diagnosis
I remember a 2017 Impala that came into the shop with a complaint of intermittent stalling at stoplights. There were no consistent check engine lights, just a history code for U0100 (Lost Communication with ECM). We checked the wiring, grounds, and power feeds to the ECM—everything looked perfect. On a hunch, we monitored the internal module temperature with a high-end scan tool. We found that as the ECM heated up in the engine bay, its internal processor would start to fail, causing the communication loss and stalling. Replacing it with a standard, un-programmed module would have meant towing the car to a dealer. Instead, we used a VIN-programmed module just like this one. The swap took less than 30 minutes, and the car ran perfectly, with no further issues. It’s a prime example of how a reliable, pre-programmed part saves immense time and hassle.
Is Your GM Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, it might be time for a replacement:
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U0100
- ✔ Vehicle refuses to start or has difficulty starting
- ✔ Noticeable decrease in fuel efficiency
- ✔ Rough idling, engine stalling, or misfires
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to pass state emissions testing
A Straightforward Guide to Installation
Installing your new 2017 Verano ECM is a manageable task that requires basic tools and careful attention to detail. While specifics can vary slightly by model, this general guide covers the core process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow capacitors to discharge before starting work.
- Locate the ECM: On many of these models, the ECM is found in the engine compartment, often on the driver’s side (LH) or behind the fan shroud. Consult a service manual for your specific vehicle if you’re unsure.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses connected to the old ECM. Never pull on the wires themselves; gently wiggle the connector body. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. It’s typically held in place by a few bolts or nuts.
- Install the New Module: Mount your new, pre-programmed ECM in the same location and secure it with the original hardware. Do not overtighten the bolts.
- Reconnect Everything: Firmly plug the wiring harnesses into the new ECM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: After installation, you will likely need to perform a security relearn procedure (often called a Passlock or anti-theft relearn). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. This allows the new ECM to sync with your vehicle’s anti-theft system.
Verified Vehicle Compatibility
This module is guaranteed to be a direct-fit replacement for the following vehicles, provided the options match. Please provide your VIN upon purchase to ensure perfect programming.
- 2017 Buick Verano – Electronic Control Module
- 2017 Buick Regal – Electronic Control Module; (LH engine compartment)
- 2017 Buick Enclave – Electronic Control Module; (behind fan shroud)
- 2017 Cadillac Caprice – Electronic Control Module; 3.6L
- 2017-2019 Cadillac XTS – Electronic Control Module; (3.6L), VIN 3 (8th digit, opt LFX)
- 2017-2019 Chevrolet Impala – Electronic Control Module
- 2017 Chevrolet Traverse – Electronic Control Module; (behind fan shroud)
- 2017 Chevrolet Equinox – Electronic Control Module; (LH engine compartment)
- 2017 GMC Acadia – Electronic Control Module; VIN J (11th digit, Limited), (behind fan shroud)
- 2017 GMC Terrain – Electronic Control Module; (LH engine compartment)
Frequently Asked Questions
What exactly is an ECM?
The Engine Control Module (ECM) is your vehicle’s main computer, responsible for managing engine performance. It takes data from sensors all over the vehicle to control the fuel injectors, ignition coils, and emissions systems for optimal power, efficiency, and low emissions.
Is this module truly plug-and-play?
Yes, for the most part. We program it to your vehicle’s VIN so it has the correct software. However, you will still need to perform a simple ‘Security Relearn’ procedure after installation so the ECM can communicate with your vehicle’s anti-theft system. This procedure does not require any special tools.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
Will this fix my specific check engine light codes?
This module will resolve issues directly caused by a faulty ECM, including common internal failure codes like P0601 and P0606. However, if your codes are related to a bad sensor or wiring issue, you will still need to fix that underlying problem. A new 2017 Verano ECM is the solution when the computer itself is the point of failure.
Is this part compatible with other numbers?
Yes, this ECM, part number 12667189, is a direct replacement for part numbers 12667002 and 12666070.