Is Your GM Vehicle Running Rough or Not Starting?
A failing Engine Control Module (ECM) can be the source of countless frustrating and difficult-to-diagnose issues in your 2009 Buick Enclave, GMC Acadia, or other compatible GM vehicle. As the central computer for your engine, the ECM manages everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it begins to fail, it can cause a cascade of problems that can leave you stranded and facing a hefty repair bill at the dealership. This direct replacement ECM, part number 12623325, is the definitive solution to get your vehicle back on the road, running as it should.
From the Diagnostic Bay
We had a 2009 Acadia come in with a persistent P0606 code (ECM Processor Fault) and an intermittent stalling issue that other shops couldn’t solve. They had already replaced the throttle body and multiple sensors, wasting hundreds of dollars. After confirming power and grounds to the module were solid, we knew the internal processor was failing. We installed one of our VIN-programmed modules, performed a quick crankshaft position sensor relearn, and the vehicle ran perfectly. The customer was thrilled to have a reliable vehicle again without the excessive cost and hassle of a dealership visit. This highlights the importance of correctly identifying the root cause – often, it’s the brain, not the body.
Symptoms of a Failing Engine Control Module
If you’re experiencing any of the following issues, a faulty ECM could be the culprit. Don’t let these problems persist and potentially cause further damage to your vehicle’s engine or emissions systems.
- ✔ Check Engine Light is on with communication-related codes (U-codes) or internal processor fault codes (P06xx series).
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Misfire codes even after replacing spark plugs and coils.
- ✔ Cooling fans running constantly or not at all.
- ✔ Loss of communication with your diagnostic scan tool.
The Plug-and-Play Solution: A Pre-Programmed 2009 Enclave Engine Control Module
What sets this module apart is our professional programming service. When you purchase this 2009 Enclave Engine Control Module, you’re not just getting a part; you’re getting a complete, ready-to-install solution. We use your vehicle’s Vehicle Identification Number (VIN) to load the latest, most stable software updates directly from GM. This critical step ensures that the module communicates perfectly with all other systems in your vehicle, from the transmission control module to the anti-lock brake system.
Bypassing this step by installing a used, non-programmed module from a salvage yard will result in a no-start condition and require an expensive tow to a dealership with specialized equipment. Our service saves you time, money, and the headache of coordinating programming after the sale. Simply provide your VIN during checkout, and we handle the rest.
Guaranteed Compatibility
This ECM is a direct replacement for several original equipment part numbers, ensuring a perfect fit and function. It is compatible with the following part numbers: 12623325, 12628387, 12605672, 12630594, 19300016.
This part will fit these makes and models with these options:
- Buick Enclave 2009: Electronic Control Module; (behind fan shroud)
- Cadillac CTS 2008-2009: Electronic Control Module; (RH front engine compartment), 3.6L, VIN V (8th digit)
- Cadillac STS 2008-2009: Electronic Control Module; (RH engine), 3.6L
- GMC Acadia 2009: Electronic Control Module; (behind fan shroud)
- Saturn Outlook 2009: Electronic Control Module; (behind fan shroud)
- Chevrolet Traverse 2009: Electronic Control Module; (behind fan shroud)
Installation is straightforward for a knowledgeable DIYer or any professional technician. After installation, some vehicles may require a simple security relearn procedure or a Crankshaft Position (CASE) relearn, which can often be performed with a capable bidirectional scan tool or by following a specific key-on/key-off procedure.
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s 17-digit VIN when you place your order, and the module will arrive ready for installation with the latest GM software.
Where do I find my VIN?
Your VIN can be found on a metal plate on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this part difficult to install?
The physical replacement is typically straightforward, involving disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. However, some vehicles may require a security or CASE relearn procedure after installation, which may require a scan tool.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM, then yes, this part will resolve the issue. It’s crucial to have a proper diagnosis to confirm the ECM is the point of failure before ordering. This module will not fix problems related to other faulty sensors or mechanical issues.
What happens if I install it without providing a VIN?
The module will not have the correct software for your specific vehicle. This will result in a no-start condition, incorrect engine and transmission operation, and multiple error codes. Providing your VIN is essential for a successful repair.