Restore Peak Performance to Your GM Vehicle
Is your 2009 Saturn Outlook, GMC Acadia, or other compatible GM vehicle suffering from frustrating issues like a persistent check engine light, unexplained stalling, or erratic engine behavior? As a technician with over two decades of experience, I’ve seen these symptoms countless times, and they often point directly to a failing Engine Control Module (ECM). The ECM is the brain of your engine, managing everything from fuel mixture and ignition timing to transmission shifting. When it falters, the entire vehicle’s performance and reliability are compromised.
This isn’t just a replacement part; it’s a direct solution. We offer a dependable Engine Control Module, part number 12630594, that arrives at your doorstep programmed specifically for your vehicle. Simply provide your Vehicle Identification Number (VIN) after purchase, and our experts will flash the module with the latest, most stable software updates from General Motors. This critical step ensures seamless communication with your vehicle’s other systems, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
I remember a 2009 Acadia that came into my shop with a whole laundry list of complaints from the owner: intermittent stalling at red lights, poor acceleration, and a check engine light that three other shops couldn’t permanently fix. The codes were all over the place—from random misfires to communication errors. After ruling out the usual suspects like sensors and wiring, I focused on the ECM. On these GM 3.6L platforms, the module’s location behind the fan shroud exposes it to significant heat cycles. Over time, this can cause internal solder joints to fail. We installed a VIN-programmed module just like this one, and it was like night and day. The engine smoothed out instantly, all codes cleared, and the customer called a week later saying it hadn’t run that well in years. This is the correct fix for a complex problem.
Common Signs of a Failing ECM
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ Unexplained stalling or rough idling.
- ✔ Poor engine performance, hesitation, or misfires.
- ✔ Automatic transmission shifting issues.
- ✔ Communication errors with scan tools.
A Straightforward Guide to Installation
Replacing the ECM on these vehicles is a manageable job for a confident DIYer. The module is typically located behind the radiator fan shroud.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Access the Module: Depending on your model, you may need to remove the upper radiator support or fan shroud to gain clear access to the ECM.
- Disconnect Connectors: Carefully release the locking tabs and unplug the electrical wiring harnesses from the old ECM. Inspect the connectors for any corrosion or damage.
- Remove Old ECM: Unbolt the old module from its mounting bracket. Keep the hardware as you will reuse it.
- Install New ECM: 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. Reassemble any components you removed, like the fan shroud.
- Final Step: Reconnect the negative battery terminal. Your vehicle may require a security relearn procedure, which can often be done without special tools (consult your owner’s manual or online resources for your specific model). Start the engine and verify the check engine light is off.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12623325, 12628387, 12605672, 12630594, and 19300016. It is guaranteed to fit the following vehicles:
- 2009 GMC Acadia – Electronic Control Module; (behind fan shroud)
- 2009 Chevrolet Traverse – Electronic Control Module; (behind fan shroud)
- 2009 Saturn Outlook – Electronic Control Module; (behind fan shroud)
- 2009 Buick Enclave – 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
Your Reliable Path Back to the Road
Don’t let a faulty computer keep your vehicle sidelined. This pre-programmed 2009 Outlook Engine Control Module is the most efficient and reliable way to solve complex electronic issues and restore your vehicle’s factory performance. By handling the programming for you, we save you time, money, and the headache of coordinating with a dealership. Order with confidence and get your vehicle running smoothly again.
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. We program the module to your vehicle’s specific VIN before shipping. In most cases, it is a direct installation, though some vehicles may require a simple key relearn procedure that you can do at home.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a placard on the driver’s side of the dashboard visible through the windshield.
Is this a new or used part?
This is a high-quality, inspected, and tested used OEM part that has been programmed with the latest GM software for your vehicle, ensuring reliable performance.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (like codes P0601 or P0606), this part is the correct solution. It’s essential to properly diagnose the issue first, as other failing sensors can also cause a check engine light.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. We cannot ship the module until we receive and program it with your VIN.
Does this part come with a warranty?
Yes, all of our electronic modules come with a warranty. Please see the warranty tab on the product page for specific details and duration.