Is Your GM Vehicle Acting Up? It Could Be The Engine’s Brain.
If you’re dealing with a persistent check engine light, rough idling, stalling, or a car that just won’t start, the Engine Control Module (ECM) is often the culprit. As the central computer for your engine, when it fails, it can cause a cascade of frustrating and hard-to-diagnose problems. I’ve seen it hundreds of times in my shop: perfectly good sensors and mechanical parts get replaced, but the root issue lies with a faulty ECM.
Expert Pro Tip: Check Your Connectors First
Before you even order a replacement ECM, take a moment to inspect the module’s electrical connectors. Over the years, I’ve seen countless cases where corrosion or a bent pin was the real problem. Disconnect the battery, unplug the ECM, and look for any green or white crusty buildup. Cleaning the terminals with a dedicated contact cleaner can sometimes save you the cost of a new part. If they’re clean and the problem persists, you’ve confirmed the module itself is the likely issue.
The Smart Solution: A VIN-Programmed ECM
Forget the hassle and high cost of a dealership visit. We offer a reliable, tested, and pre-programmed ECM that gets you back on the road quickly. This is a genuine used module, service number 12669908, sourced from a salvaged vehicle and meticulously inspected. The real value is in our service: we flash the module with the latest official GM software, specifically calibrated to your vehicle’s unique VIN. This ensures all systems communicate correctly from the moment of installation.
What This Pre-Programmed 2018-2019 LaCrosse ECM Fixes:
- โ Persistent Check Engine Light (CEL)
- โ Engine stalling or hesitation
- โ Poor fuel economy
- โ Failed emissions tests
- โ Communication errors with other modules
- โ No-start conditions where the engine cranks but won’t fire
Critical Information for a Successful Installation
Because modern vehicles have sophisticated anti-theft systems, there is one crucial step you or your mechanic must perform after installation. This module is programmed to your VIN’s engine calibrations, but it is not yet paired with your vehicle’s security system.
IMPORTANT: If the vehicle does not start after installing the new ECM, a Vehicle Theft Deterrent (VTD) relearn is required. This procedure must be performed using the official GM programming software (TIS2Web). This is a standard procedure for any professional technician with the right tools. Other potential setups, like a crankshaft variation relearn or injector flow rate programming, may also be necessary depending on your specific vehicle and are the responsibility of the installer.
Guaranteed Fitment for Service Number 12669908
While this listing focuses on the 2018-2019 LaCrosse ECM, this versatile module is compatible with a wide range of GM vehicles. Please verify your original part has the service number 12669908. This part fits the following makes and models with the specified 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)
To complete your order, please provide your vehicle’s 17-digit VIN in the notes at checkout or send it to us in a message. We cannot program and ship your module without it.