Restore Peak Performance to Your Vehicle
Is your Cadillac STS, Corvette, or Trailblazer suffering from frustrating issues like a persistent Check Engine Light, erratic idling, poor fuel economy, or even a no-start condition? These are classic signs of a failing Engine Control Module (ECM). The ECM is the brain of your vehicle’s engine, and when it falters, the entire system’s performance and reliability are compromised. This isn’t just an inconvenience; it’s a critical failure that needs a reliable solution. Don’t let a faulty computer keep you off the road. This direct-replacement ECM is your answer.
From My Shop Floor: A Common Diagnostic Pitfall
“A customer’s 2009 Cadillac STS came in last month with intermittent stalling and a whole host of random communication codes. He had already replaced the throttle body and a few sensors with no luck. In my experience, especially with these E38/E67 generation GM computers, internal circuit board failures can mimic sensor or wiring problems. We connected our scope and saw a noisy 5-volt reference signal coming directly from the ECM. After installing one of our pre-programmed modules, the signal stabilized, all codes cleared, and the car ran perfectly. It saved the customer from chasing phantom issues and spending hundreds more on unnecessary parts.”
Why Choose Our Pre-Programmed 2009–2010 STS Engine Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealership hassle out of the equation. By providing us with your vehicle’s VIN during checkout, you receive a module that is professionally programmed with the latest, most stable software updates from General Motors. This ensures optimal performance, fuel efficiency, and communication with all other modules in your vehicle.
- ✔ VIN-Programmed for Your Vehicle: We flash the module with the newest GM software specific to your car, truck, or SUV.
- ✔ Truly Plug-and-Play: No expensive dealer visits or special tools required for installation or programming.
- ✔ Solves Common Problems: Directly addresses issues like false trouble codes, rough running, transmission shifting problems, and reduced power.
- ✔ Wide-Ranging Compatibility: A single, reliable solution for dozens of GM models.
- ✔ Cost-Effective Repair: Avoids the high costs and scheduling delays associated with dealership service departments.
Plug-and-Play Installation: No Dealer Visit Required
You can perform this repair right in your own driveway. Follow these simple steps to get your vehicle back in top shape:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all systems to power down.
- Locate the ECM: On the 2009-2010 STS, the ECM is typically found on the driver’s side (LH) frame rail. Consult a service manual for your specific model if you’re unsure of the location.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that must be released. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed ECM into place. Reconnect the wiring harnesses, ensuring they click securely into position.
- Reconnect Power: Reattach the negative battery terminal.
- Final Step: Start the vehicle and let it idle for a few minutes. A security relearn procedure may be required, which typically involves cycling the key and is easily performed without tools. Your vehicle is now ready to drive!
Guaranteed Fitment & Part Number Compatibility
This module, part number 12628911, is a direct replacement for a wide array of GM vehicles. It is fully interchangeable with the following GM service numbers: 12636659, 12639300, 1263605, 12628993, 12625453, 12622175, 12630464, and 12678512.
It is confirmed to fit the following makes and models with the specified options:
- Buick Lucerne: 2009-2011 (4.6L)
- Cadillac CTS: 2009 (6.2L)
- Cadillac DTS: 2009-2011
- Cadillac SRX: 2009 (4.6L)
- Cadillac STS: 2009 (4.4L, 4.6L), 2010 (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)
- Saab 9-7X: 2009