Restore Your Cadillac’s Performance and Reliability
Is your 2009 Cadillac SRX suffering from perplexing issues like stalling, rough idling, a persistent check engine light, or a complete no-start condition? These are classic symptoms of a failing Engine Control Module (ECM), the central computer that governs your vehicle’s engine performance, fuel economy, and emissions. A faulty ECM can turn a reliable luxury SUV into a source of constant frustration. This genuine OEM Engine Control Module, part number 12639300, is the definitive solution to restore your vehicle’s factory performance and get you back on the road with confidence.
Is Your Cadillac SRX Showing Signs of ECM Failure?
A failing engine computer can manifest in various ways, often mimicking other component failures. Before spending hundreds on unnecessary parts, see if your vehicle is exhibiting any of these common symptoms of a bad ECM:
- ✔ Check Engine Light: The most common indicator, often with codes related to sensors, communication errors (U-codes), or processor faults.
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly while driving or at a stop, and you might experience random misfires or a rough, inconsistent idle.
- ✔ No-Start Condition: The engine cranks but refuses to start, indicating the ECM is not properly managing spark or fuel delivery.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in MPG can be caused by the ECM failing to calculate the correct air-fuel mixture.
- ✔ Transmission Shifting Problems: The ECM communicates with the transmission controller. A failing module can lead to harsh shifting, delayed engagement, or being stuck in one gear.
- ✔ Intermittent Electrical Issues: Seemingly random problems that come and go can sometimes be traced back to a failing central computer.
Expert Pro Tip
Expert Pro Tip
Before replacing your ECM, always perform a thorough check of the vehicle’s battery, alternator, and all primary power and ground connections to the module. A weak battery or a corroded ground wire can cause symptoms that are nearly identical to a failing ECM. A few minutes with a multimeter can save you from replacing a perfectly good part.
The Direct-Fit Solution: Your Pre-Programmed 2009 SRX Engine Module
What sets this module apart is our professional programming service. We don’t just send you a part; we deliver a plug-and-play solution. When you place your order, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians then use official GM equipment to flash the module with the latest, most stable software specific to your 2009 SRX. This critical step ensures that the ECM communicates flawlessly with all other modules in your vehicle, from the transmission to the anti-lock brakes. This eliminates the need for an expensive trip to the dealership for programming.
Guaranteed Compatibility and Simple Installation
This 2009 SRX Engine Module is a direct replacement for a wide range of GM vehicles, ensuring a perfect fit and function. It is fully interchangeable with the following service numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, and 12678512.
While primarily for the 2009 Cadillac SRX with the 4.6L engine, this versatile module also fits an extensive list of other makes and models, including:
- Buick Lucerne (2009-2011)
- Cadillac CTS, DTS, STS, XLR (2009-2010)
- Chevrolet Colorado, Corvette, Trailblazer (2009-2012)
- GMC Canyon, Envoy (2009-2012)
- Hummer H3 (2009-2010)
- Saab 9-7x (2009)
Installation is straightforward for a knowledgeable DIYer or any professional mechanic. Once you receive the pre-programmed module, simply disconnect the battery, locate and unplug the old ECM, install the new one, and reconnect the battery. In most cases, a security relearn procedure may be required, which can be easily performed without special tools and typically takes about 30 minutes. Instructions for this procedure are readily available online or in your vehicle’s service manual.
Frequently Asked Questions
Expert Pro Tip
Before replacing your ECM, always perform a thorough check of the vehicle’s battery, alternator, and all primary power and ground connections to the module. A weak battery or a corroded ground wire can cause symptoms that are nearly identical to a failing ECM. A few minutes with a multimeter can save you from replacing a perfectly good part.