Restore Peak Performance to Your Cadillac with a VIN-Programmed ECM
Is your 2010-2012 Cadillac CTS running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the central computer of your vehicle. A faulty ECM can cripple your car’s performance, fuel economy, and reliability. This isn’t just an annoyance; it’s a critical component failure that needs a dependable solution. I’ve seen countless vehicles in my bay with these exact issues, and the fix is often a reliable, correctly programmed ECM.
This isn’t just a generic part off a shelf. We provide a genuine OEM replacement ECM, part number 12637106, that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means it arrives loaded with the latest GM software updates, ensuring optimal communication with all your vehicle’s systems. By providing us with your VIN at checkout, you eliminate the need for an expensive trip to the dealership for programming. You get a part that is ready for installation right out of the box.
From the Diagnostic Bay: The Intermittent No-Start Mystery
A customer brought in a 2011 CTS with a frustrating problem: it would randomly refuse to start. No crank, no click, nothing. Other times, it would start and run perfectly. They had already replaced the battery and starter to no avail. After hooking up my scan tool, I noticed intermittent communication loss with the ECM (U0100 codes). A visual inspection showed no corrosion or damage to the wiring. By monitoring live data, I confirmed the ECM was occasionally failing to power up its internal processors. We replaced it with a VIN-programmed module like this one, and the problem was solved instantly. These intermittent faults are a hallmark of internal ECM failure and can be a nightmare to diagnose without simply replacing the faulty unit.
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 2010-2012 CTS Engine Control Module may need replacement:
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ Engine stalling, misfiring, or running rough.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Problems with the transmission shifting correctly.
- ✔ Communication errors with other modules (U-codes).
A Straightforward Guide to Installation
Installing your new ECM is a manageable job for a confident DIYer. Taking your time and following these steps will ensure a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all systems to power down completely.
- Locate the ECM: On the 2010-2012 Cadillac CTS, the Engine Control Module is typically located in the engine compartment on the right-hand (passenger) side.
- Disconnect the Connectors: Carefully release the locking tabs on the electrical harness connectors and pull them straight out from the module. Never force them. Inspect the connectors for any signs of corrosion or bent pins.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need it for the new module.
- Install the New ECM: Mount your new, pre-programmed ECM onto the bracket and secure it. Reconnect the electrical harnesses, ensuring they click firmly into place.
- Final Steps: Reconnect the negative battery terminal. Your vehicle may require a security or crankshaft position sensor relearn procedure, which can often be completed with a compatible high-end scan tool or by following specific drive cycle instructions. Start the vehicle and check for any warning lights.
Guaranteed Vehicle Compatibility
This ECM is a direct replacement for part number 12637106 and is also compatible with several other part numbers. It is guaranteed to fit the following vehicles, provided the part number on your original module matches one of the numbers listed below. Please verify your original part number before ordering.
- Compatible Part Numbers: 12616889, 12630908, 12637106, 12642665, 12650256, 12651993
- Buick Allure: 2010 (2.4L, 3.0L)
- Buick LaCrosse: 2010-2011 (2.4L, 3.0L)
- Buick Regal: 2011
- Cadillac CTS: 2010-2012 (3.0L, 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)
Why do you need my VIN?
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to program the ECM with the exact software and calibrations specific to your car’s engine, transmission, and factory options. This ensures seamless integration and proper function without needing a trip to the dealer.
Is this a simple plug-and-play installation?
For most vehicles, yes. Because the module comes pre-programmed to your VIN, it is designed to be as close to plug-and-play as possible. However, some GM vehicles may require an additional security relearn or crankshaft variation relearn procedure, which can be done with certain scan tools or by following a specific drive cycle.
How do I find my original part number?
The part number is printed on a sticker directly on your current ECM. You will need to locate the module on your vehicle and read the number from the label to ensure compatibility.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal failure of the ECM (like codes P0601 or P0606), then this part is the correct solution. However, a Check Engine Light can be triggered by hundreds of other issues. It’s always best to have the codes professionally scanned to confirm the ECM is the root cause.
What if my part number is not on your list?
If your part number is not listed in the compatibility section, this module may not be correct for your vehicle. Please contact us with your vehicle’s information and original part number, and we will be happy to assist you in finding the right part.