Restore Your Cadillac’s Performance and Reliability
Is your 2010-2011 Cadillac SRX suffering from frustrating and unpredictable issues like stalling, a persistent check engine light, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s performance. A faulty ECM can disrupt everything from fuel delivery and ignition timing to transmission shifting, making your luxury SUV unreliable. This isn’t just an inconvenience; it’s a critical component failure that needs a dependable solution.
We offer a direct, hassle-free fix: a replacement Engine Control Module, part number 12651993, that arrives at your door fully programmed to your vehicle’s specific VIN. By handling the programming with the latest GM software updates before shipping, we eliminate the most expensive and time-consuming step of the repair. You get a part that’s ready for installation right out of the box, saving you a costly trip to the dealership and hours of diagnostic headaches. Restore your vehicle’s smooth operation and peace of mind with a reliable, properly configured 2010-2011 SRX Engine Control Module.
Case Study: A Tricky Diagnosis
I remember a 2011 GMC Terrain (which uses this exact same ECM) that came into my shop with a maddeningly intermittent no-start problem. The owner had already spent a small fortune replacing the battery and starter. The vehicle would throw communication codes, primarily a U0100 (Lost Communication with ECM/PCM). After hours spent tracing wires and checking grounds, everything looked perfect. On a hunch, I tapped the ECM housing while an assistant cranked the engine, and it fired right up. The issue was an internal failure on the ECM’s main board—a hairline fracture that would separate when cold and connect when warm. Replacing it with a pre-programmed module like this one solved the problem instantly. It’s a powerful reminder that sometimes the ‘brain’ itself is the source of the ghost in the machine.
Common Signs of a Failing ECM
If the computer managing your engine is failing, you’ll notice significant performance problems. Here are some of the most common symptoms I’ve seen in my 20+ years of diagnostics. If your vehicle is showing these signs, a faulty ECM is a likely culprit:
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained stalling or rough idling, especially when the engine is warm.
- ✔ Noticeable decrease in fuel economy.
- ✔ Poor acceleration or hesitant engine performance.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Communication errors with diagnostic scan tools.
A Straightforward Guide to Installation
Installing your new 2010-2011 SRX Engine Control Module is a manageable job for a DIY enthusiast. Since we program the unit beforehand, you won’t need any special computer equipment. Just follow these steps carefully.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure the system is fully discharged.
- Locate the ECM: On the 2010-2011 Cadillac SRX, the Engine Control Module is typically found in the left-hand (driver’s side) of the engine compartment. It’s a silver metal box with large electrical connectors.
- Disconnect the 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 mounting hardware that secures the old ECM to its bracket. Set the old module aside.
- 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 ECM until they click into place. Reconnect the negative battery terminal.
- Final Steps: In some cases, a security relearn procedure (often called a Passlock or anti-theft relearn) may be necessary. This procedure is simple and can typically be done without tools by cycling the ignition key. Consult your vehicle’s service information for the specific steps.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12651993 and several other interchangeable part numbers. We’ve confirmed it fits a wide range of GM vehicles. Please verify your vehicle is on this list. This is not a complete list, but it covers the most common applications:
- Cadillac SRX: 2010-2011 (3.0L Engine)
- Cadillac CTS: 2010-2012 (3.0L, 3.6L Engines)
- Chevrolet Equinox: 2010-2011
- GMC Terrain: 2010-2011
- Buick LaCrosse / Allure: 2010-2011 (2.4L, 3.0L Engines)
- Chevrolet Camaro: 2012 (3.6L Engine)
- Chevrolet Impala: 2012
- Chevrolet Captiva Sport: 2012
- Chevrolet Orlando: 2012-2013
- Buick Regal: 2011
- Saab 9-5: 2010-2011 (2.0L Engine)
This module is a direct fit for part numbers: 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993.
Frequently Asked Questions
What do I need to do after I purchase this ECM?
After you complete your purchase, you MUST provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We use this to program the module with the correct, latest GM software for your specific vehicle configuration before we ship it to you.
Is this part truly ‘plug and play’?
Yes, for the most part. Because we pre-program it, you will not need a dealership scan tool for software flashing. However, some GM vehicles may require a simple, tool-free security relearn procedure to sync the new ECM with the anti-theft system. This can usually be done by cycling the ignition key.
How do I know if the ECM is really the problem?
While this module fixes issues caused by a failed ECM, we always recommend a thorough diagnosis by a qualified mechanic. Key indicators are specific diagnostic trouble codes (like P0601, P0606), a no-start condition with power to all other components, or a complete loss of communication with the module.
Where is the ECM located on my 2010-2011 SRX?
On the 2010-2011 Cadillac SRX, the Engine Control Module is located in the engine bay, on the driver’s side (LH side).
Will this work for other GM models?
Yes. This 2010-2011 SRX Engine Control Module is also a direct fit for many other GM vehicles from the same era, including the Equinox, Terrain, CTS, and LaCrosse, among others. Please see our detailed compatibility list above to confirm your vehicle is included.