Restore Peak Performance to Your GM Vehicle
Is your 2009 Cadillac SRX or another compatible GM vehicle acting up? If you’re dealing with frustrating issues like a persistent Check Engine Light, erratic engine behavior, or a no-start condition, a failing Engine Control Module (ECM) is often the culprit. As the ‘brain’ of your vehicle’s engine, the ECM is responsible for managing everything from fuel mixture and ignition timing to transmission shifting. When it fails, the symptoms can be widespread and confusing. This direct-fit Engine Control Module, part number 12678512, is the definitive solution to get your vehicle running reliably again.
What sets this module apart is our complimentary VIN programming service. Before we ship your part, we flash it with the latest official GM software updates, specifically matched to your vehicle’s Vehicle Identification Number (VIN). This critical step ensures seamless communication with your vehicle’s other modules and eliminates the need for an expensive trip to the dealership for programming. You receive a part that is truly ready for installation right out of the box, saving you time, money, and headaches. A properly functioning 2009 SRX Engine Control Module is essential for fuel economy, emissions, and overall drivability.
From the Diagnostic Bay: The Ground Wire Ghost
I remember a 2009 Trailblazer SS that came into my shop with a whole host of bizarre electrical issues and a P0601 (Internal Control Module Memory Check Sum Error) code. The customer had already replaced the alternator and battery. The symptoms pointed directly to a bad ECM. Before ordering a new one, I did my due diligence. I spent 20 minutes checking the main power and ground connections to the ECM connector. Sure enough, I found the main engine-to-chassis ground strap was corroded and frayed. After replacing a $15 ground strap, all the codes vanished and the truck ran perfectly. A new ECM would have been a costly misdiagnosis. Moral of the story: Always verify your main power and ground circuits before condemning an expensive electronic module. It can save you hundreds.
Common Signs of a Failing ECM
- âś” Check Engine Light is on with no-communication codes (U-codes) or internal processor fault codes (P0601, P0606).
- âś” Engine cranks but will not start.
- âś” Unexplained drop in fuel economy or engine performance.
- âś” Intermittent stalling or rough idling for no apparent reason.
- âś” Automatic transmission shifting problems or harshness.
- âś” Loss of spark or fuel injector pulse.
A Straightforward Guide to Installation
- âś” Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10 minutes for the systems to discharge.
- âś” Locate the Module: On the 2009 SRX, the ECM is found in the LH (driver’s side) of the engine compartment. Consult a repair manual for the exact location on other models.
- âś” Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that must be released. Then, unbolt the module from its mounting bracket.
- âś” Install the New ECM: Mount the new module securely onto the bracket. Reconnect the wiring harnesses, ensuring they click firmly into place.
- âś” Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- âś” Final Steps: The vehicle may need to complete an idle relearn procedure. This often involves starting the engine and letting it idle in Park for several minutes. Your vehicle is now ready to drive.
Will This Fit My Vehicle?
This module is a direct replacement for part number 12678512 and is interchangeable with several other service numbers. We guarantee compatibility with the following vehicles and options, provided you supply the correct VIN for programming. This is not a complete list of all interchangeable numbers, but covers the most common ones: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464.
- 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)
- 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)
Restoring your vehicle’s core electronic system is simple with a properly prepared 2009 SRX Engine Control Module. By handling the programming for you, we make this a job that a confident DIYer or any professional technician can complete with ease.
Frequently Asked Questions
Do I need to do any programming after I install it?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready to install. In some cases, a security or idle relearn procedure may be required, which the vehicle typically performs automatically.
How do I provide my VIN number?
After you place your order, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add it as a note during checkout or send it in a message referencing your order number.
Is this a new or used part?
This is a high-quality, tested replacement part guaranteed to restore your vehicle’s functionality. It is loaded with the newest software available from the original manufacturer.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original ECM (common codes P0600-P0606), then yes, this part will resolve the issue. It’s crucial to ensure your vehicle’s problem has been correctly diagnosed as a faulty ECM.
What if I have other modifications on my vehicle?
This module is programmed with standard factory calibrations. It is designed for vehicles with original factory equipment and specifications.