Is your 2010-2011 GMC Acadia, or another compatible GM vehicle, suffering from perplexing engine issues? Unexplained stalling, a persistent check engine light, or erratic performance can often be traced back to a failing Engine Control Module (ECM). This vital component is the brain of your vehicle’s engine, and when it falters, the entire system is compromised. Restore your vehicle’s reliability and performance with our direct-fit, professionally programmed ECM, part number 12636355.
This isn’t just a replacement part; it’s a complete solution. We take the guesswork out of the repair by programming the module specifically for your vehicle using your VIN. This ensures that it arrives with the latest GM software updates, ready for a straightforward installation. By matching the programming to your vehicle’s factory specifications, we help ensure proper communication between all onboard systems, from the transmission to the fuel injectors.
Common Symptoms of a Failing ECM
If you’re experiencing any of the following issues, a faulty ECM could be the culprit. A proper diagnosis is always recommended, but these are strong indicators that your engine’s computer needs attention.
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling or misfires.
- ✔ Poor acceleration and overall loss of power.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Erratic transmission shifting behavior.
From the Diagnostic Bay
We had a 2011 GMC Acadia come into the shop with a classic complaint: intermittent stalling at stoplights and a check engine light that would come and go. The owner had already replaced the spark plugs and a coil pack based on a misfire code, but the problem persisted. Our initial scan showed a U0100 ‘Lost Communication with ECM’ code. While this can point to the module itself, experience tells us to check the fundamentals first. We inspected the ECM’s main connector and found slight corrosion on a couple of pins due to moisture intrusion. After cleaning the connector and applying dielectric grease, the problem was solved. This is a crucial reminder: before condemning the ECM, always inspect the wiring harness, connectors, and ground connections. A simple cleaning can sometimes save you hundreds of dollars. However, if those components are sound, the ECM itself is the next logical point of failure.
Why Choose a VIN-Programmed 2010-2011 Acadia ECM?
The Engine Control Module is more than just a piece of hardware; it’s a sophisticated computer tailored to your vehicle’s specific configuration. A generic, unprogrammed module from a salvage yard or parts store will not work correctly. It can lead to a no-start condition, incorrect engine operation, and a host of system conflicts. Our service eliminates these headaches. By providing your Vehicle Identification Number (VIN) at checkout, you receive a module that is loaded with the precise software for your Acadia, Enclave, Traverse, or other compatible model. This process accounts for your engine type, transmission, and factory-installed options, making the installation process as seamless as possible.
Simple Ordering Process
- ✔ Purchase: Complete your order for this ECM.
- ✔ Provide VIN: Reply to our confirmation email or contact us with your vehicle’s 17-digit VIN.
- ✔ Programming: Our technicians will flash the module with the latest GM software specific to your VIN.
- ✔ Shipping: We ship the ready-to-install module directly to you.
Important Note for Camaro and LaCrosse Owners: Due to the immobilizer (anti-theft) systems in these specific models, a simple VIN flash is not sufficient for a plug-and-play installation. To ensure full functionality, we require you to send us your original ECM. We will clone the necessary immobilizer data from your old module to the new one. We will contact you with shipping instructions after your purchase.
Full Compatibility List
This module is a direct replacement for part number 12636355 and is also compatible with part numbers 19300015, 19300014, 12617230, and 12635019. It fits the following vehicles:
- Buick Allure: 2010 (3.6L)
- Buick Enclave: 2010-2011
- Buick LaCrosse: 2010-2011 (3.6L)
- Cadillac CTS: 2010-2011 (3.6L)
- Cadillac STS: 2010-2011 (3.6L)
- Chevrolet Camaro: 2010-2011 (3.6L)
- Chevrolet Traverse: 2010-2011
- GMC Acadia: 2010-2011
- Saturn Outlook: 2010
Frequently Asked Questions
Do I need to do any additional programming after installation?
In most cases, no. Our VIN programming handles the primary software. However, some vehicles may require a simple security relearn or crankshaft position sensor relearn procedure, which can often be done without special tools. Instructions can be provided upon request.
Where is the ECM located on my 2011 GMC Acadia?
On the 2010-2011 GMC Acadia, as well as the Traverse, Enclave, and Outlook, the ECM is typically located behind the engine’s fan shroud, accessible from the top of the engine bay.
What happens if I forget to provide my VIN?
We cannot ship your order without a VIN. Our team will contact you via email or phone after your purchase to obtain the necessary information. Providing it during checkout is the fastest way to get your part.
Is this a new or used part?
This is a high-quality, tested, and verified used component. Each module is thoroughly inspected and then programmed with the latest vehicle-specific software to ensure it meets or exceeds original performance standards.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty ECM, this part will resolve the issue. It’s crucial to have a proper diagnosis performed to confirm the ECM is the root cause, as other sensors or wiring issues can cause similar symptoms.