Restore Your Vehicle’s Brain Without the Dealer Price Tag
Dealing with a faulty Engine Control Module (ECM) can be one of the most frustrating diagnostic challenges. If your Buick, Chevy, Cadillac, or GMC is suffering from a persistent check engine light, erratic engine behavior, a no-start condition, or inexplicable communication errors, the ECM is often the culprit. As a technician with over two decades of experience, I’ve seen how a failing module can mimic a dozen other problems, costing you time and money on unnecessary parts. This is your direct, reliable, and cost-effective solution: a genuine, used OEM 2020 Envision Engine Module, service number 12669908, fully programmed to your vehicle’s specific VIN.
Why a VIN-Programmed Module is the Smart Choice
The days of simply swapping a computer from one car to another are long gone. Modern vehicles require the ECM to be precisely calibrated to their specific options and security systems. We handle the most complex part for you. Before this module ships, our experts will flash it with the latest official GM software updates using the VIN you provide. This ensures that when you receive it, it’s already matched to your car’s powertrain, emissions systems, and features. You get a part that’s ready for the final, on-vehicle security handshake, saving you a costly trip to the dealership for initial programming.
A Technician’s Notebook: The Intermittent No-Start Nightmare
A 2018 Equinox came into my bay with a ghost of a problem: it would randomly refuse to start. No crank, no click, nothing. The battery was new, the starter tested fine, and the ignition switch was solid. After hours of tracing wires, we found that the ECM was intermittently failing to send the ‘crank’ signal to the BCM. We sourced a used ECM, but the real time-saver was getting it pre-programmed. Instead of towing the vehicle to a dealer or waiting for a mobile tech, we installed the VIN-matched module, performed the quick VTD relearn right in our bay, and had the customer back on the road the same day. This is the efficiency we offer you.
Is Your Vehicle Showing These Failure Signs?
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Stalling, rough idling, or poor engine performance.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Unexplained loss of fuel economy or power.
- ✔ Communication error codes with other modules (e.g., U0100).
- ✔ Internal module memory error codes, such as P0601, P0603, or P0606.
- ✔ Failed emissions testing due to module-related faults.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- ✔ Locate the ECM: On most compatible models, the ECM is found in the engine compartment, typically on the driver’s side (LH) or sometimes above the battery.
- ✔ Disconnect Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Avoid pulling on the wires themselves.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- ✔ Install the New Module: Mount your new, pre-programmed ECM in place and secure it with the original bolts.
- ✔ Reconnect Everything: Firmly plug the wiring harness connectors back into the new module until they click. Reconnect the negative battery terminal.
- ✔ Perform Final Relearns: This is a critical step. If the vehicle does not start, you or your mechanic MUST perform the Vehicle Theft Deterrent (VTD) relearn using a compatible scan tool with access to GM’s TIS2Web service. Other procedures like a crankshaft position variation relearn may also be required.
Verified Vehicle Compatibility
This module, service number 12669908, is a direct fit for a wide range of General Motors vehicles. Please verify your original part number matches before ordering. This part is confirmed to fit the following models and options:
- Acadia: 2017 (2.5L, VIN Z), 2018 (2.5L)
- ATS: 2017 (2.0L)
- Cruze: 2017-2018 (Gasoline)
- CTS: 2017 (2.0L)
- Equinox: 2018 (1.5L or 2.0L), 2019 (1.5L, ID 12669908)
- LaCrosse: 2018 (2.5L)
- Malibu: 2017, 2018 (1.8L or 2.0L)
- Regal: 2018 (2.0L)
- Volt: 2017-2018 (Gasoline, ID 12669908)