Restore Your Traverse’s Electrical Functions and Peace of Mind
Are you chasing electrical gremlins in your 2009-2012 Chevrolet Traverse? One minute the power locks work, the next they don’t. The dashboard lights up with random warnings, or worse, the vehicle refuses to start. As a technician with over two decades of experience, I’ve seen these frustrating issues countless times. The culprit is often a failing Body Control Module (BCM), the central command center for your vehicle’s electronics. This isn’t just an annoyance; it can affect everything from your interior lights to the anti-theft system. Trying to diagnose these intermittent problems can feel like a wild goose chase, but the solution is often simpler than you think.
We offer a dependable, direct-fit solution: a Body Control Module, part number 20815898, that arrives at your door pre-programmed for your specific vehicle. Forget expensive dealership visits and the hassle of finding a shop with the right programming tools. Simply provide us with your Vehicle Identification Number (VIN) at checkout, and our experts will flash the module with the latest official GM software. This ensures all your vehicle’s options and security features integrate seamlessly, just like the original. This is the most efficient way to get your 2009-2012 Traverse BCM replaced and your vehicle back to normal.
A Technician’s Notebook
A customer brought in their 2011 Traverse last month with a truly bizarre set of symptoms. The radio would turn on and off by itself, the driver’s side window wouldn’t roll down, and the security light would stay on, sometimes preventing the engine from cranking. They had already replaced the battery and checked all the fuses. After connecting my scan tool, I noticed a flood of communication error codes between various modules. This is a classic sign. In my shop, I’ve seen that water intrusion is a common cause of BCM failure on these Lambda-platform SUVs (Traverse, Acadia, Enclave). A small leak from the windshield or sunroof can drip down onto the BCM, located on the left side of the dash, causing corrosion and erratic behavior over time. Replacing the faulty 2009-2012 Traverse BCM with a correctly programmed unit and fixing the source of the leak solved all the problems at once.
Is Your Traverse Showing These Signs?
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Flickering or inoperative interior and exterior lights.
- ✔ The anti-theft or security system light stays on, preventing the car from starting.
- ✔ False warnings appearing on the instrument cluster (e.g., “Service StabiliTrak”).
- ✔ Remote keyless entry (fob) not working reliably.
- ✔ Unexplained battery drain when the vehicle is off.
- ✔ Communication errors with a professional scan tool.
Your Straightforward Installation Guide
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning any electrical work.
- Locate the BCM: On the 2009-2012 Traverse, the Body Control Module is typically found on the left-hand (driver’s) side of the dashboard, often behind the lower dash panel near the steering column.
- Remove Connectors: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Do not force them.
- Swap the Module: Unbolt or unclip the old module from its mounting bracket and install the new, pre-programmed BCM in its place.
- Reconnect Everything: Securely plug all the electrical connectors back into the new module. Reconnect the negative battery terminal.
- Perform Final Procedures: After installation, certain critical relearn procedures are necessary. Follow the steps in the section below to ensure full functionality and safety.
Important Post-Installation Steps
Replacing the BCM is a great first step, but to complete the job correctly and safely, these follow-up procedures are often required. Failure to do so can leave warning lights on and safety systems compromised.
- Airbag System Reset: The airbag warning light will likely be illuminated. A professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes communication between the new BCM and the Sensing and Diagnostic Module (airbag computer).
- Brake Pedal Position Sensor Relearn: Some vehicles require the Brake Pedal Position Sensor to be recalibrated after a BCM replacement. This is crucial for the proper operation of the traction control and anti-lock brake systems.
- Theft Deterrent Relearn: Your vehicle may need to go through a key relearn procedure to recognize your existing keys. This can typically be done without special tools and involves a sequence of key turns.
Note: Specific procedures can vary. If you are not equipped with a bi-directional scan tool or are unsure about these steps, we strongly recommend seeking assistance from a professional mechanic.
Verified Vehicle Compatibility
This module is a direct replacement for part number 20815898 and is guaranteed to fit your 2009-2012 Traverse BCM needs. It also interchanges with a wide range of other GM part numbers, ensuring broad compatibility. Please verify your part number before ordering. This part is a confirmed fit for the following vehicles and part numbers:
Interchangeable Part Numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084.
This part fits a wide variety of GM models including the Acadia, Enclave, Impala, Tahoe, Yukon, Escalade, Express/Savana vans, and more. Please refer to the detailed fitment list or contact us with your VIN to confirm compatibility.
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. We handle the programming for you before shipment. Just provide your vehicle’s VIN during checkout, and the module will arrive with the latest GM software, ready for installation. This saves you time and money.
Where is the BCM located on a 2011 Chevy Traverse?
The Body Control Module on a 2009-2012 Traverse is located inside the cabin, on the driver’s side. You will typically find it behind the lower dashboard panel, to the left of the steering column.
What happens if I install this without the post-installation procedures?
If you skip the relearn procedures, your vehicle may still have issues. The airbag light will likely stay on, the anti-theft system may prevent the car from starting, and stability control systems may not function correctly. These steps are critical for safety and full functionality.
Will this fix my intermittent no-start problem?
A faulty BCM is a very common cause of intermittent no-start conditions, especially if the security light is on. While other issues could be at play (like a starter or ignition switch), replacing a known-bad BCM is often the correct fix for this symptom.
Is this a difficult part for a DIYer to replace?
The physical replacement is straightforward for someone with basic mechanical skills. It involves removing a dash panel and a few bolts/connectors. The main challenge is performing the post-installation relearn procedures, which may require a professional-grade scan tool.