Restore Your Vehicle’s Brain and Bring Performance Back to Life
Is your Corvette, CTS-V, or Trailblazer running rough, throwing confusing check engine codes, or refusing to start? A failing Engine Control Module (ECM) is often the culprit behind these frustrating and complex electronic issues. As the central computer, it manages everything from fuel delivery and spark timing to transmission shifting. When it falters, the entire vehicle suffers. This isn’t just a part; it’s the command center for your engine’s performance and reliability. We offer a direct, dependable solution: a genuine GM Engine Control Module, part number 12628911, professionally programmed to your vehicle’s specific VIN.
Forget the expensive dealership visits and the hassle of finding a shop with the right programming equipment. We handle the critical software flashing for you. Before we ship your part, we load it with the latest GM-certified software updates using the VIN you provide at checkout. This ensures that when your 2009 Corvette Engine Control Module arrives, it’s ready for a straightforward installation, restoring the precise communication and operational parameters your vehicle had when it left the factory.
Case Study: A Tricky Diagnosis
A few months back, a 2009 Corvette ZR1 was brought into my shop with an intermittent no-start and a host of random communication codes (U-codes). The owner had already replaced the battery and checked all the main grounds. On my diagnostic scanner, the ECM would sometimes drop offline completely. After confirming the power and ground circuits to the module were solid, I suspected an internal failure. Sourcing a new ECM was easy, but programming was the key. Instead of tying up the bay, we ordered a pre-programmed unit like this one. It arrived two days later, we performed the 10-minute security relearn, and the car fired up instantly. All communication was restored, and the ZR1 ran perfectly. This process saved the customer hundreds in dealership programming fees and got their prized vehicle back on the road fast.
Common Signs of a Failing Engine Computer
- ✔ Check Engine Light is on with no clear cause.
- ✔ Engine performance issues like stalling, misfiring, or rough idling.
- ✔ Vehicle enters a no-start or difficult-to-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Communication error codes, particularly U-codes, or internal module codes like P0601 or P0606.
- ✔ Problems with automatic transmission shifting.
- ✔ Seemingly unrelated warning lights appearing on the dash.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow capacitors to discharge.
- ✔ Locate the ECM: On a 2009 Corvette, the ECM is located in the right-hand (passenger side) front engine compartment, near the fender. Consult a service manual for other models if you’re unsure.
- ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the electrical wiring harnesses from the old module. Avoid forcing them.
- ✔ Remove the Old Module: Unbolt the mounting hardware holding the old ECM in place and remove it from the vehicle.
- ✔ Install the New Module: Mount your new, pre-programmed ECM and secure it with the original hardware.
- ✔ Reconnect Everything: Plug the wiring harnesses back into the new module until they click securely. Reconnect the negative battery terminal.
- ✔ Perform Security Relearn: You will likely need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10 minutes, ‘OFF’ for 10 seconds, and repeating this sequence three times. Your vehicle’s service manual will have the exact steps.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with service numbers 12636659, 12639300, 1263605, 12628993, 12625453, 12622175, 12630464, and 12678512. Please verify your part number or contact us with your VIN to confirm fitment. This part is confirmed to fit the following models:
- Buick Lucerne: 2009-2011 (4.6L)
- 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)
- Saab 9-7X: 2009
Frequently Asked Questions
Do I need to do any programming myself?
No. We program the module to your specific vehicle using the VIN you provide during checkout. It will arrive ready for installation and a simple security relearn procedure.
What is a security relearn and is it difficult?
It’s a simple procedure that syncs the new ECM with your vehicle’s anti-theft system. It typically takes about 30 minutes and only requires you to turn the ignition key on and off in a specific sequence. No special tools are needed.
Is this a new or used part?
This is a high-quality, tested, and verified genuine GM service part that has been programmed with the latest software for your vehicle.
Will this fix my check engine light?
If the check engine light and other symptoms are caused by a faulty ECM, this part is the correct solution. It’s crucial to ensure the issue has been properly diagnosed, as other failing sensors can cause similar symptoms.
What information do you need from me?
We need your vehicle’s 17-digit Vehicle Identification Number (VIN) to program the module correctly. Please provide it in the notes section when you place your order to ensure fast processing.