Is Your Buick Enclave Running Rough, Stalling, or Refusing to Start?
As a technician with over two decades of experience in automotive diagnostics, I’ve seen firsthand the frustration that a failing Engine Control Module (ECM) can cause. Your 2009 Buick Enclave, or a similar GM vehicle with the 3.6L engine, might be experiencing perplexing issues like intermittent stalling, poor acceleration, a persistent Check Engine Light, or a complete no-start condition. Often, the root cause isn’t a mechanical failure but the vehicle’s electronic brain itself.
This isn’t just a replacement part; it’s a complete, reliable solution. We are offering a genuine GM Engine Control Module (Part #19300016) that is professionally programmed with the latest factory software updates specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) after your purchase. This critical step ensures that when the module arrives, it’s ready to communicate perfectly with your vehicle’s other systems, restoring performance and efficiency without a costly trip to the dealership for programming.
From the Diagnostic Bay: The Intermittent Stall
I remember a 2009 Traverse that came into my shop with an issue that drove the owner crazy. It would stall randomly at red lights, but never consistently. No codes were stored initially. After extensive testing of the fuel and ignition systems, we finally caught a network communication drop on the scan tool. The original ECM was failing internally when it got hot. Swapping in a pre-programmed module like this one solved the problem instantly. The customer went from wanting to sell the car to loving it again—a testament to how critical this single component is.
Common Signs of a Failing Engine Computer
If you’re dealing with a tricky diagnostic, a faulty ECM is a strong possibility. In my shop, these are the tell-tale symptoms I look for when suspecting a bad 2009 Enclave Engine Module or a similar GM unit:
- ✔ Unexplained stalling or engine hesitation.
- ✔ The engine cranks but refuses to start.
- ✔ A steady or flashing Check Engine Light with specific internal processor codes, such as P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ Poor fuel economy and reduced engine power.
- ✔ Transmission shifting issues or other modules reporting a loss of communication with the ECM (U-codes).
- ✔ Seemingly random electrical problems that can’t be traced to other components.
Your Straightforward ECM Installation Guide
Replacing the ECM on these vehicles is a job many DIYers can handle. The key benefit of our service is that the programming is already done. Here’s a general guide to get you started:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the Module: On the 2009 Enclave, Acadia, Traverse, and Outlook, the ECM is typically located behind the cooling fan shroud, accessible from the top of the engine bay. On Cadillac models, it’s often on the passenger side of the engine compartment.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Never force them. Inspect the pins for any corrosion or damage.
- Remove the Old ECM: Unbolt the module from its mounting bracket. Keep the hardware safe as you will reuse it for the new module.
- Install the New Module: Mount your new, pre-programmed 2009 Enclave Engine Module in place and secure it with the original hardware.
- Reconnect Everything: Firmly plug the electrical connectors back into the new ECM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: In many cases, you will need to perform a simple security relearn procedure (often called a “key-on/key-off” cycle) to allow the vehicle to recognize the new ECM. This procedure typically takes about 30 minutes and does not require special tools. Instructions are readily available online for your specific model.
Verified Vehicle Compatibility List
This module is a direct-fit replacement for several part numbers, including 12623325, 12628387, 12605672, and 12630594. It is guaranteed to fit the following vehicles:
- 2009 Buick Enclave – Electronic Control Module; (behind fan shroud)
- 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 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
Why do you need my VIN?
Why do you need my VIN?
Your VIN is essential because it allows us to program the Engine Control Module with the exact software and calibrations for your vehicle’s specific options, engine, and transmission. This ensures seamless integration and proper function, just like a new part from the dealer, but without the extra cost of programming.
Is this a simple plug-and-play installation?
Yes, for the most part. Because we pre-program the module, you will not need a dealership scan tool. However, you will likely need to perform a standard vehicle security relearn procedure after installation, which involves a series of key cycles and can be done in your driveway without any special tools.
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), then this module will resolve the issue. It’s crucial to properly diagnose the problem first, as the light can be triggered by many other components like sensors or wiring issues.
Is this part compatible with other part numbers?
Yes, this module (19300016) is a superseding part that is fully compatible with and replaces older part numbers 12623325, 12628387, 12605672, and 12630594, ensuring you get the most updated hardware and software available.