Programmed 2017 Equinox ECM 12666070 for GM vehicles. This engine computer module resolves check engine lights, stalling, and no-start conditions.

Programmed 2017 Equinox ECM 12666070 | Engine Control Module

End Your Engine Troubles for Good

Get your 2017 Equinox running smoothly again with this professionally programmed Engine Control Module. We flash the ECM to your vehicle’s VIN with the latest GM software, so it arrives ready to install. This is the ideal solution for fixing check engine lights, stalling, and no-start issues without a costly trip to the dealership. Order today to restore your vehicle’s reliability and performance!

$199.95

+11.99 USPS Priority Shipping

Availability: In stock

SKU: 590-10080-13 Categories: Engine Control Module (ECM), GM

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Restore Peak Performance and Reliability to Your GM Vehicle

Are you dealing with frustrating engine problems in your 2017 Chevrolet Equinox? Issues like a persistent check engine light, unexpected stalling, rough idling, or a no-start condition can often be traced back to a single component: the Engine Control Module (ECM). As the central computer of your vehicle, the ECM is responsible for managing everything from fuel mixture and ignition timing to transmission shifting. When it fails, the symptoms can be unpredictable and difficult to diagnose. This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s performance, fuel economy, and reliability.

We offer a straightforward and dependable solution. This ECM, part number 12666070, is a direct-fit replacement for your original module. The most significant benefit we provide is our professional programming service. Before we ship the part, our technicians will use your vehicle’s VIN to flash the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and function, eliminating the need for an expensive and time-consuming trip to the dealership. You receive a part that is truly ready for installation, designed to restore the precise performance your vehicle had when it left the factory.

Case Study: A Tricky Diagnosis

I remember a 2017 GMC Terrain that came into my shop with a whole host of bizarre electrical issues. The owner reported random stalling at stoplights, occasional hard shifting, and a check engine light that would come and go. His previous mechanic had replaced the alternator and battery to no avail. After scanning the vehicle, I found communication error codes (U-codes) alongside a history of intermittent misfires. Instead of just throwing parts at it, we checked the power and ground circuits to the ECM, which were solid. This pointed to an internal failure of the module itself. We installed one of our pre-programmed ECMs, performed the security relearn, and the Terrain ran perfectly. The customer saved hundreds compared to the dealership quote and was thrilled to have his reliable daily driver back.

Key Signs of a Failing Engine Computer

A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer may need replacement. Look out for:

✔ The check engine light is illuminated, especially with codes like P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or U0100 (Lost Communication With ECM).
✔ Your vehicle fails to start or starts intermittently.
✔ Noticeable decrease in fuel efficiency.
✔ The engine runs rough, misfires, or stalls unexpectedly.
✔ Problems with automatic transmission shifting, such as harsh or delayed shifts.
✔ Loss of power and poor acceleration.

A Straightforward Guide to Installation

Installing your new 2017 Equinox ECM is a manageable task for a confident DIYer or any professional technician. Because we handle the programming, you can skip the most complex step. Follow these general guidelines for a successful installation:

Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow the system to fully discharge.
Locate the ECM: On the 2017 Equinox and Terrain, the ECM is 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. Consult a service manual for your specific vehicle if you’re unsure.
Disconnect the Module: Carefully unplug the wiring harness connectors from the old ECM. There are usually release tabs that need to be pressed or lifted. Never force the connectors.
Remove the Old ECM: Unbolt the old module from its mounting bracket. Keep the hardware as you will need it for the new module.
Install the New ECM: Mount the new, pre-programmed ECM in place and secure it with the original hardware. Reconnect the wiring harnesses, ensuring they click securely into place.
Reconnect the Battery: Reattach the negative battery terminal.
Perform Security Relearn (CRITICAL): Your vehicle’s anti-theft system will likely need to be synchronized with the new ECM. This procedure is simple and requires no special tools. Typically, it involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times before starting the engine. We will include specific instructions for your vehicle.

Guaranteed Vehicle Compatibility

This module is professionally programmed to work with your vehicle and is a direct replacement for part numbers 12667002, 12666070, and 12667189. It is guaranteed to fit the following makes and models with the specified options:

2017 Cadillac XTS: (3.6L), VIN 3 (8th digit, opt LFX)
2017-2019 Chevrolet Impala
2017 Chevrolet Caprice: 3.6L
2017 Chevrolet Traverse: (behind fan shroud)
2017 Chevrolet Equinox: (LH engine compartment)
2017 Buick Regal: (LH engine compartment)
2017 Buick Verano
2017 Buick Enclave: (behind fan shroud)
2017 GMC Acadia: VIN J (11th digit, Limited), (behind fan shroud)
2017 GMC Terrain: (LH engine compartment)