Restore Peak Performance to Your GM Vehicle with a VIN-Programmed Engine Module
Is your 2009 Chevrolet Traverse or other GM 3.6L vehicle suddenly stalling, running rough, or refusing to start? Are you staring at a persistent Check Engine Light that just won’t go away? Before you resign yourself to a costly and inconvenient trip to the dealership, consider the root cause. In my 20+ years as a diagnostic technician, I’ve seen these exact symptoms countless times, and they often point directly to a failing Engine Control Module (ECM). This isn’t just a part; it’s the brain of your engine, and when it falters, your vehicle’s reliability disappears.
We offer a straightforward, dependable solution: a high-quality replacement ECM, part number 19300016, that arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We handle the complex part—flashing the module with the latest GM software updates—so you don’t have to. This eliminates the need for expensive scan tools or dealership appointments, turning a potentially complicated repair into a manageable one for both professional mechanics and determined DIYers.
Case Study: A Tricky Diagnosis
I remember a 2009 Acadia that came into the shop with a frustrating intermittent no-start condition. The owner had already replaced the battery and starter. It would crank but not fire, and then, an hour later, it would start up like nothing was wrong. There were no consistent trouble codes, just a history of a random U0100 (Lost Communication with ECM/PCM) and a P0601 (Internal Control Module Memory Check Sum Error). After checking all the power and ground circuits to the ECM, we found they were solid. The culprit was the 2009 Traverse Engine Module itself, which was failing internally when it got hot. A replacement, pre-programmed unit like this one solved the problem permanently, saving the customer from further guesswork and the cost of towing it to a dealer.
Is Your Vehicle Showing These Signs of ECM Failure?
- ✔ Unexplained stalling or engine hesitation, especially after warming up.
- ✔ The engine cranks but refuses to start.
- ✔ A persistent Check Engine Light with codes like P0601, P0606, or U0100.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions test due to communication errors.
A Straightforward Guide to Your ECM Installation
Replacing your 2009 Traverse Engine Module is a job you can handle with basic tools. Because we pre-program the unit, the most difficult step is already done. Just follow this general guide for a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On the Traverse, Acadia, Enclave, and Outlook, the ECM is typically located behind the cooling fan shroud at the front of the engine bay. On CTS and STS models, it’s usually on the right-hand (passenger) side of the engine compartment.
- Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harnesses from the old module. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need it for the new installation.
- Install the New Module: Mount your new, pre-programmed ECM in place and securely tighten the bolts.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Relearn (If Necessary): While not always required, some vehicles may need a security or crank position sensor relearn procedure. In many cases, the vehicle will start and run perfectly, and the system will adapt over the first 50-100 miles of driving.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a range of GM vehicles and is compatible with several part numbers, including 12623325, 12628387, 12605672, and 12630594. Please verify your vehicle is on the list below.
- 2009 Acadia – Electronic Control Module; (behind fan shroud)
- 2009 Buick Enclave – Electronic Control Module; (behind fan shroud)
- 2008-2009 Cadillac CTS – Electronic Control Module; (RH front engine compartment), 3.6L, VIN V (8th digit)
- 2008-2009 Cadillac STS – Electronic Control Module; (RH engine), 3.6L
- 2009 Saturn Outlook – Electronic Control Module; (behind fan shroud)
- 2009 Chevrolet Traverse – Electronic Control Module; (behind fan shroud)
Frequently Asked Questions
How does the programming process work?
It’s simple. After you complete your purchase, you’ll need to send us your vehicle’s 17-digit VIN. Our technicians will then use that VIN to load the latest, most stable GM-approved software directly onto the module before we ship it to you.
Do I need to do any additional programming after installation?
In over 95% of cases, no. This module is designed to be a plug-and-play solution. Occasionally, a specific vehicle may require a security relearn or crank sensor relearn, which can often be done without a special scan tool.
Is this a new or used part?
This is a quality-tested, inspected, and verified functional component that has been programmed with new GM software. It is guaranteed to restore your vehicle’s functionality.
What makes your module better than getting one from a junkyard?
A junkyard module will not be programmed for your car’s specific VIN and options. It would still require a trip to a dealer or specialized shop for expensive programming. Our module arrives ready to install, saving you that critical step and expense.
What if I order the wrong part?
We strongly recommend matching your original part number to the list provided (12623325, 12628387, 12605672, 12630594, 19300016) and verifying your vehicle is in the compatibility list. Providing your VIN for programming also acts as a final check to ensure compatibility.