Restore Peak Performance to Your Vehicle with a Reliable Engine Computer
Is your Cadillac SRX, or another compatible GM vehicle, suffering from frustrating and unpredictable issues? A faulty Engine Control Module (ECM) is often the hidden culprit behind problems that can leave you stranded. As a technician with over 20 years of experience, I’ve seen firsthand how a failing ECM can cause a cascade of electrical gremlins, from a simple check engine light to a complete no-start condition. This isn’t just a part; it’s the central command center for your engine’s performance, fuel economy, and emissions. When it fails, your vehicle simply can’t operate as it should.
This replacement 2009 SRX Engine Control Module is the definitive solution to get your vehicle running reliably again. We take the guesswork and hassle out of the repair by professionally programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ever leaves our facility. This means it arrives at your door with the latest GM software updates, ready for a straightforward installation. You can bypass the expensive dealership programming fees and lengthy service appointments, getting you back on the road faster.
Case Study: A Tricky Diagnosis
I remember a 2009 Cadillac DTS that came into the shop with an intermittent stalling problem that no one could figure out. The customer had replaced the fuel pump and crank sensor, but the issue persisted. Scans showed no consistent codes, just a few random communication errors (U-codes) that would appear and disappear. After checking all the wiring and grounds, we focused on the ECM. On the surface, it seemed fine. But by monitoring live data during a long test drive, we saw the fuel injector pulse width signals drop out for a split second right before it would stall. It was an internal processor fault in the ECM. We replaced it with a pre-programmed unit like this one, and the car ran perfectly. It’s a classic example of how a failing ECM can mimic other component failures.
Is Your Vehicle Showing These Symptoms?
- ✔ Check Engine Light is on with codes like P0601, P0606, or other processor faults.
- ✔ The engine cranks but refuses to start.
- ✔ Intermittent stalling or rough idling for no apparent reason.
- ✔ A noticeable drop in fuel efficiency.
- ✔ The transmission shifts erratically or feels harsh.
- ✔ Communication errors with other modules on the vehicle (U-codes).
- ✔ Apparent failure of multiple sensors at once.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning work.
- ✔ Locate the ECM: On the 2009 SRX, the ECM is found in the driver’s side (LH) engine compartment. Its location varies on other models, so consult a repair guide if you’re unsure.
- ✔ Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Never force them.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- ✔ Install the New Module: Mount your new, pre-programmed ECM securely onto the bracket.
- ✔ Reconnect Everything: Plug the electrical connectors firmly back into the new module until they click into place. Reconnect the negative battery terminal.
- ✔ Final Steps: In some cases, a security or crank relearn procedure may be required. Turn the key to the ‘ON’ position for 10-15 seconds before starting to allow the systems to initialize. The vehicle is now ready to start.
Guaranteed Vehicle Compatibility
This module is a direct replacement for part number 12625453 and is interchangeable with service numbers 12636659, 12639300, 1263605, 12628993, 12628911, 12622175, 12630464, and 12678512. It is confirmed to fit the following vehicles:
- Cadillac CTS (2009): 6.2L
- Cadillac DTS (2009-2011)
- Cadillac SRX (2009): 4.6L
- Cadillac STS (2009-2010): 4.4L, 4.6L
- Cadillac XLR (2009): With matching ID
- Chevrolet Colorado (2009-2012): 2.9L, 3.7L
- Chevrolet Corvette (2009): ZR1
- Chevrolet Trailblazer (2009): 6.0L
- GMC Canyon (2009-2012): 2.9L, 3.7L
- GMC Envoy (2009): 5.3L
- Hummer H3 (2009-2010): 3.7L
- Buick Lucerne (2009-2011): 4.6L
- Saab 9-7X (2009)
Frequently Asked Questions
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, absolutely. Providing your VIN is critical. We use it to load the precise, vehicle-specific GM software and calibrations onto your module, ensuring it functions perfectly with your car’s engine, transmission, and options.
Is this a simple plug-and-play installation?
For most vehicles, yes. Because we program it beforehand, you can typically install it and start the vehicle. Some models may require a simple security relearn procedure, which can usually be done without special tools.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original ECM (like code P0601), this part will be the solution. It’s important to ensure the root cause of the problem has been correctly diagnosed before ordering.
Where is the ECM located on my vehicle?
The location varies. For the 2009 SRX, it’s in the LH engine compartment. For Colorado/Canyon/H3, it’s on the RH firewall. For the Lucerne, it’s in the lower air cleaner box. Always confirm the location for your specific model before starting.
What if my original part number isn’t 12625453?
Please check the list of interchangeable service numbers provided in the description. This module replaces several different part numbers, so as long as your original number is on that list, this part will work for you.