Is Your GM Vehicle Acting Up? It Could Be The Brains of the Operation.
If your 2017 Chevrolet Caprice, Traverse, Acadia, or other compatible GM vehicle is suffering from mysterious and frustrating issues like stalling, poor fuel economy, a persistent Check Engine Light, or even a no-start condition, the problem may lie with its most critical component: the Engine Control Module (ECM). The ECM is the central computer that governs everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the entire vehicle’s performance and reliability are compromised.
Don’t let a faulty computer keep you off the road. This is a direct replacement ECM, part number 12666070, that arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We handle the complex flashing process, loading the latest, most stable software updates directly from GM. This ensures that when you receive the part, it’s ready for a straightforward installation, saving you a costly trip to the dealership and the hassle of specialized programming tools.
We had a 2017 Chevy Traverse come into the shop with a classic case of what the owner thought was a bad ECM. The car would randomly stall at idle and had a P0606 (ECM Processor Fault) code stored. He had already replaced the throttle body and MAF sensor with no luck. Before condemning the expensive computer, we did a full systems check. We found a corroded ground wire on the engine block, barely making contact. After cleaning and securing the ground, all the symptoms vanished. The original ECM was perfectly fine. This is a crucial reminder: always verify power and ground integrity to the module before replacing it. A simple check can save you hundreds of dollars and a lot of frustration.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Vehicle refuses to start or has difficulty starting.
- ✔ Noticeable decrease in engine performance and power.
- ✔ Poor fuel economy and rough idling.
- ✔ Stalling or misfiring for no apparent reason.
- ✔ Automatic transmission shifting issues or harsh shifts.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our Pre-Programmed 2017 Caprice ECM?
The key to a successful ECM replacement is proper programming. An unprogrammed module is just a metal box; it cannot communicate with the other modules in your vehicle. Our service eliminates this critical and often difficult step. By providing us with your VIN during checkout, you are ensuring that the 2017 Caprice ECM you receive is a true plug-and-play solution. We flash the unit with the correct calibration files and software updates from General Motors, tailored specifically for your vehicle’s original factory options. This process restores factory performance and can often resolve drivability issues caused by outdated software.
Simple Installation Process
Once you receive your programmed module, the installation is typically straightforward. Locate your old ECM (positions vary by model, as noted in the fitment list), disconnect the negative battery terminal, carefully unplug the wiring harnesses, and unbolt the old unit. Install the new module, reconnect the harnesses and battery, and you’re nearly done. In many cases, a simple security relearn procedure (which can be done without special tools) is all that’s needed to get your vehicle running again. This part is a reliable and cost-effective alternative to expensive dealership repairs.
Guaranteed Fitment
This ECM is a direct fit for a wide range of GM vehicles. Please verify your part number and vehicle model against the list below to ensure compatibility. This module is an interchangeable replacement for part numbers 12667002, 12666070, and 12667189.
- CAPRICE 17 Electronic Control Module; 3.6L
- TRAVERSE 17 Electronic Control Module; (behind fan shroud)
- XTS 17-19 Electronic Control Module; (3.6L), VIN 3 (8th digit, opt LFX)
- ACADIA 17 Electronic Control Module; VIN J (11th digit, Limited), (behind fan shroud)
- ENCLAVE 17 Electronic Control Module; (behind fan shroud)
- REGAL 17 Electronic Control Module; (LH engine compartment)
- VERANO 17 Electronic Control Module
- IMPALA 17-19 Electronic Control Module
- EQUINOX 17 Electronic Control Module; (LH engine compartment)
- TERRAIN 17 Electronic Control Module; (LH engine compartment)
Restore your vehicle’s reliability and performance with a properly programmed 2017 Caprice ECM. Order today and experience the difference that a correctly functioning engine computer makes.
Frequently Asked Questions
Do I need to have this ECM programmed by a dealer?
No. We program the ECM to your vehicle’s VIN before we ship it. This means it will be ready for installation right out of the box, saving you a trip to the dealership and additional programming fees.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically find this on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my car’s problem for sure?
While this ECM will resolve issues caused by a faulty module, it’s crucial to ensure a proper diagnosis has been performed. Many other issues, such as bad sensors, wiring problems, or poor grounds, can mimic ECM failure. We recommend having a qualified technician diagnose the issue before ordering.
Is any other procedure required after installation?
In many GM vehicles, you may need to perform a security relearn procedure (also known as a Passlock or anti-theft relearn). This procedure pairs the new ECM to your vehicle’s anti-theft system and can typically be done without any special tools. Instructions are widely available online for your specific model. A Crankshaft Variation (CASE) relearn may also be needed with a scan tool for optimal performance.
What if I install it without providing a VIN?
An ECM that is not programmed to your specific VIN will not work. It will not be able to communicate with the other modules in your vehicle, and the engine will not start. Providing your VIN is a mandatory step for this part to function correctly.