Restore Peak Performance to Your GM Vehicle
If your 2010-2011 Buick LaCrosse, Cadillac CTS, or Chevy Traverse is suffering from frustrating issues like intermittent stalling, a persistent check engine light, or a complete no-start condition, a failing Engine Control Module (ECM) is a very likely culprit. As the brain of your vehicle’s engine, a faulty ECM can cause a cascade of problems that are often misdiagnosed. This module is a direct-fit, reliable solution, professionally programmed with the latest GM software updates specifically for your vehicle. Simply provide your VIN at checkout, and we handle the complex programming for you, saving you a costly and time-consuming trip to the dealership.
A Technician’s Notebook: The Intermittent Stall
I once had a 2011 GMC Acadia in my bay with an issue that was driving the owner crazy. It would stall randomly at red lights, but then start right back up. They had already replaced the fuel pump and a few sensors with no luck. When I connected my diagnostic scanner, I didn’t see consistent sensor faults, but I did notice intermittent U0100 (Lost Communication with ECM/PCM) codes logged in other modules. This told me the problem wasn’t a bad sensor, but the central computer itself was periodically failing. A replacement, correctly programmed ECM like this one resolved the issue completely. This is a classic scenario where chasing symptoms can be expensive, while addressing the core problem is the real fix.
Common Signs of a Failing Engine Computer
Not sure if the ECM is your problem? Over my 20 years in diagnostics, I’ve seen these symptoms point to a faulty module time and time again. Look out for:
- ✔ Check Engine Light is on with internal processor codes like P0601, P0602, or P0606.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ The vehicle stalls unexpectedly while driving or idling.
- ✔ Rough or erratic automatic transmission shifting.
- ✔ Communication errors with your scan tool or other vehicle modules.
A Straightforward Guide to Installation
Installing your pre-programmed 2010-2011 LaCrosse ECM is a manageable job for a confident DIYer or any professional mechanic. Follow these general steps for a successful replacement.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system to fully discharge before starting work.
- Locate the Module: On the 2010-2011 LaCrosse, the ECM is found in the engine compartment on the driver’s side (LH side). For other models like the Traverse or Acadia, it’s typically located behind the fan shroud.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Do not force them. Inspect the connectors for any corrosion or damage.
- Remove the Old ECM: Unbolt the old module from its mounting bracket.
- Install the New ECM: Mount your new module securely and reconnect the electrical harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Important Note for LaCrosse & Camaro Owners: For these specific models, a simple swap is not enough due to the factory immobilizer system. To ensure a true plug-and-play installation, we require you to send us your original ECM. We will extract the security data and transfer it to your new module. We will contact you with shipping instructions after your purchase. This vital step prevents a no-start condition and saves you from needing specialized tools for a security relearn procedure.
Verified Vehicle Compatibility
This ECM is a guaranteed fit for the following vehicles equipped with the 3.6L V6 engine. It is a direct replacement for part numbers 19300015, 19300014, 12617230, 12636355, and 12635019.
- Buick LaCrosse: 2010-2011 (LH engine compartment)
- Buick Allure: 2010 (LH engine compartment)
- Buick Enclave: 2010-2011 (Behind fan shroud)
- Chevrolet Traverse: 2010-2011 (Behind fan shroud)
- Chevrolet Camaro: 2010-2011 (3.6L)
- GMC Acadia: 2010-2011 (Behind fan shroud)
- Saturn Outlook: 2010 (Behind fan shroud)
- Cadillac CTS: 2010-2011 (RH front engine compartment)
- Cadillac STS: 2010-2011 (RH engine)
It means we flash the module with the correct GM-certified software for your specific vehicle using its unique 17-digit Vehicle Identification Number (VIN). This ensures all engine and transmission parameters are correct, just like a new module from the dealer, but without the extra cost and hassle.
These models have a sophisticated anti-theft (immobilizer) system. The security key data is stored in the original ECM. To make your new module plug-and-play, we must transfer this data from your old unit to the new one. Without this step, your vehicle will not start.
If the check engine light is caused by an internal failure of the ECM (common codes include P0601-P0606), then this part is the correct fix. However, you should always perform a proper diagnosis to ensure the fault is not with a sensor or wiring.
For most listed vehicles, no. The module arrives ready to install. For the LaCrosse and Camaro, the immobilizer data transfer we perform makes it plug-and-play upon arrival. No further action is needed on your end.