Restore Peak Performance to Your GM Vehicle
Is your 2009 Chevrolet Traverse or other compatible GM vehicle suffering from frustrating issues like a persistent Check Engine Light, rough idling, stalling, or a sudden drop in fuel economy? These are classic symptoms of a failing Engine Control Module (ECM), the electronic brain of your vehicle. Ignoring them can lead to more significant engine problems and even leave you stranded. As a technician with over two decades of experience, I’ve seen countless drivers spend a fortune at the dealership for what can be a straightforward fix. This module is the reliable, cost-effective solution you need.
This isn’t just a replacement part; it’s a complete solution. We take the hassle out of the repair by programming this ECM specifically to your vehicle’s VIN before it ships. It arrives loaded with the latest GM factory software updates, ensuring optimal performance, fuel efficiency, and emissions control right out of the box. You get a part that’s ready for installation, saving you the time, expense, and headache of a trip to the dealership for programming.
Case Study: A Tricky Diagnosis
I remember a 2009 Buick Enclave that came into my shop with a very elusive problem. The owner complained of intermittent stalling at stoplights and a random no-start condition that would fix itself after a few minutes. There were no consistent trouble codes, just a few stored U0100 (Lost Communication with ECM) faults. We checked grounds, wiring, and power feeds for days. Finally, we decided to monitor the ECM’s internal temperature. We discovered that once it reached operating temperature, it would begin to fail internally, causing the communication loss. Swapping in a pre-programmed ECM like this one resolved all issues instantly. It’s a reminder that a failing computer can cause some of the most confusing symptoms.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, this module is likely the solution. Look out for common Diagnostic Trouble Codes (DTCs) like P0601, P0606, or communication errors.
- ✔ Unexplained Check Engine Light illumination
- ✔ Engine stalling or cutting out while driving
- ✔ Noticeable decrease in fuel efficiency
- ✔ Rough or erratic engine idle
- ✔ Vehicle won’t start, but the battery and starter are good
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Communication errors with diagnostic scan tools
A Straightforward Guide to Installation
Installing your new 2009 Traverse Engine Control Module is a manageable job for a confident DIYer. The key is the pre-programming, which eliminates the most complex step. Always consult a repair manual specific to your vehicle for torque specs and detailed diagrams.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to discharge completely.
- Locate the ECM: On the 2009 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 often on the right-hand (passenger) side of the engine compartment.
- Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harness connectors 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 will reuse it.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Final Steps: Some vehicles may require a security relearn or crank position sensor relearn procedure, which can often be done without special tools. Turn the key to the ‘ON’ position for 10-15 minutes, then off, and then start the vehicle. It’s ready to go!
Verified Vehicle Compatibility
This module is a direct-fit replacement for several GM vehicles and is compatible with multiple 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 Enclave – Electronic Control Module; (behind fan shroud)
- 2009 Outlook – Electronic Control Module; (behind fan shroud)
- 2009 Traverse – Electronic Control Module; (behind fan shroud)
- 2009 Cadillac CTS – Electronic Control Module; (RH front engine compartment), 3.6L, VIN V (8th digit)
- 2009 Cadillac STS – Electronic Control Module; (RH engine), (3.6L)
- 2008 Cadillac CTS – Electronic Control Module; (RH front engine compartment), (3.6L), VIN V (8th digit)
- 2008 Cadillac STS – Electronic Control Module; (RH engine), 3.6L
Frequently Asked Questions
How does the VIN programming process work?
It’s simple! After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. Our technicians will use it to program the module with the latest GM software specific to your vehicle’s configuration before we ship it to you.
Is this a plug-and-play part?
Because we program it to your VIN, it is nearly plug-and-play. In some cases, your vehicle may require a simple security or crankshaft position sensor relearn procedure after installation, which can typically be done without any special scan tools.
Will this fix my specific problem?
This module corrects issues directly caused by a faulty ECM, such as internal processor faults (P0601), communication errors, and driver circuit failures. While it solves the most common problems, always ensure your vehicle’s issue has been properly diagnosed by a professional or through careful troubleshooting.
Do I need to return my old ECM?
No core charge is required for this part. You can keep your old module, though we always recommend recycling old electronics responsibly.
What if I have a different part number on my original module?
This module, part number 19300016, is a direct replacement for several other part numbers, including 12623325, 12628387, 12605672, and 12630594. As long as your vehicle is on the compatibility list, this module will function correctly.