Restore Peak Performance to Your Vehicle with a VIN-Programmed ECM
Is your 2010-2011 Buick LaCrosse suffering from a persistent check engine light, erratic performance, or a frustrating no-start condition? You’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Engine Control Module (ECM) can wreak havoc on a vehicle’s entire system. This isn’t just a part; it’s the brain of your engine, and when it falters, everything from fuel economy to transmission shifting can be affected. This replacement ECM, part number 12637106, is the reliable, straightforward solution to get your car running like new again.
We take the guesswork and high dealership costs out of the equation. Before this module ships, we will program it with the latest GM software updates, specifically matched to your vehicle’s VIN. This critical step ensures seamless communication between the new ECM and all other systems in your LaCrosse, preventing the compatibility issues that plague un-programmed modules. You get a part that’s ready for installation right out of the box, saving you time, money, and a trip to the dealer.
Case Study: A Tricky Diagnosis
I remember a 2011 LaCrosse that came into my shop with a complaint of intermittent stalling at stoplights and a check engine light that would come and go. The owner had already replaced the spark plugs and an O2 sensor with no luck. A scan revealed a P0606 code (ECM/PCM Processor Fault) and a U0100 (Lost Communication with ECM). While these can sometimes point to wiring issues, experience told me to look closer at the module itself. After verifying power and ground to the ECM were solid, we swapped in a pre-programmed module. The change was immediate. The engine idled smoothly, the codes cleared and stayed cleared, and the stalling issue was completely resolved. It’s a classic example of how a faulty ECM can mimic other problems, making a direct-fit, correctly programmed replacement the only real fix.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer may be the culprit:
- ✔ Check Engine Light is on with codes like P0601, P0606, or U0100
- ✔ Engine cranks but refuses to start
- ✔ Poor or inconsistent fuel economy
- ✔ Rough idling or stalling
- ✔ Noticeable loss of engine power and acceleration
- ✔ Transmission shifting issues or harsh shifts
- ✔ Failure to pass state emissions testing
A Straightforward Guide to Installation
Replacing the 2010-2011 LaCrosse Engine Control Module is a job most DIY enthusiasts can handle with basic tools. Our pre-programming service makes it much simpler.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On the 2010-2011 LaCrosse, the ECM is typically found in the engine compartment on the driver’s side (LH side), near the air filter housing.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses 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 ECM: Mount your new, pre-programmed module in place and secure it with the bolts.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new ECM until they click into place. Reconnect the negative battery terminal.
- Final Steps: In some cases, a security or idle relearn procedure may be required. This can often be done without special tools (e.g., turning the key to ‘ON’ for 10-15 minutes). Consult your vehicle’s service manual for specific instructions.
Verified Vehicle Compatibility
This ECM is a direct replacement for part number 12637106 and is also interchangeable with part numbers 12616889, 12630908, 12642665, 12650256, and 12651993. It is guaranteed to fit the following vehicles and configurations:
- Buick Allure: 2010 (2.4L & 3.0L)
- Buick LaCrosse: 2010-2011 (2.4L), 2010 (3.0L)
- Buick Regal: 2011
- Cadillac CTS: 2010-2012 (3.0L), 2012 (3.6L)
- Cadillac SRX: 2010-2011 (3.0L)
- Chevrolet Camaro: 2012 (3.6L)
- Chevrolet Captiva Sport: 2012
- Chevrolet Equinox: 2010-2011
- Chevrolet Impala: 2012
- Chevrolet Orlando: 2012-2013
- GMC Terrain: 2010-2011
- Saab 9-5: 2010-2011 (2.0L)
This is the definitive solution for your 2010-2011 LaCrosse Engine Control Module needs, providing reliability and restoring your vehicle’s factory performance.
Why do you need my VIN?
Your VIN (Vehicle Identification Number) is essential for us to program the ECM with the exact software and calibrations your specific vehicle requires from GM. This ensures perfect compatibility and performance, just like a module from the dealership.
Is this part difficult to install?
For most DIYers with basic tools, this is a manageable job. Since we handle the programming, you won’t need any specialized computer equipment. The main steps are disconnecting the battery, swapping the module, and reconnecting everything.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM (common codes P0601, P0606, etc.), then yes, this part is designed to resolve that issue. We recommend having a proper diagnosis to confirm the ECM is the root cause before ordering.
Does this part come with a warranty?
Yes, all our modules come with a warranty. Please refer to the warranty tab on the product page for specific terms and duration, giving you peace of mind with your purchase.
What if I order the wrong part?
We strongly encourage you to match your original part number and check the fitment list. If you provide your VIN at checkout, we can double-check compatibility to prevent errors. Please see our return policy for more details.