Restore Your Traverse’s Electrical System with a Pre-Programmed BCM
Are you chasing down frustrating electrical gremlins in your 2009-2012 Chevrolet Traverse? Intermittent warning lights, power windows with a mind of their own, or a security system that randomly acts up are all classic signs of a failing Body Control Module (BCM). The BCM is the central hub for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of confusing and unpredictable problems. This isn’t just an annoyance; it can be a serious safety concern. We offer a dependable, straightforward solution.
This BCM is a direct-fit replacement, but with a critical advantage: we program it to your Traverse’s specific VIN before it ships. This means it arrives at your door loaded with the latest GM software updates, ready for installation. You get to bypass the expensive trip to the dealership for programming, saving you significant time and money. Simply provide your VIN during checkout, and we handle the rest.
A Technician’s Notebook: The Case of the Haunted Traverse
I remember a 2011 Traverse that came into my bay with a laundry list of bizarre issues. The owner said the radio would shut off, the dome lights would flicker, and the liftgate wouldn’t open. He’d already replaced the battery. A quick scan showed a dozen communication codes, primarily U-codes pointing to the BCM. On these Lambda-platform SUVs (Traverse, Acadia, Enclave), water intrusion from a clogged sunroof drain or a leaky windshield seal can drip directly onto the BCM, located behind the driver’s side lower dash. After confirming the failure, we installed a VIN-programmed BCM just like this one. The result? Every single electrical issue was resolved instantly. It’s a common failure I’ve seen dozens of times, and a pre-programmed module is the most efficient fix.
Is Your Traverse Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security system or keyless entry failing to operate correctly.
- ✔ Unexplained battery drain that leaves you with a dead battery.
- ✔ Warning lights on the dash for ABS, Airbag, or Traction Control.
- ✔ Diagnostic trouble codes (DTCs) related to communication, such as U0140 (Lost Communication With Body Control Module).
- ✔ A complete no-start condition where the starter doesn’t engage.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
- ✔ Locate the BCM: On the 2009-2012 Traverse, the BCM is typically located on the driver’s side, up under the dashboard to the left of the steering column. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all the electrical connectors, ensuring they click securely into place.
- ✔ Reconnect Power: Reattach the negative battery terminal.
- ✔ Perform Post-Install Checks: Start the vehicle and test all body functions—lights, locks, windows, radio, etc. Note the post-installation procedures below, as some may be required.
Important Post-Installation Information
While this module is programmed for your vehicle, certain systems may require a ‘handshake’ procedure after installation to sync properly. This is normal for many modern vehicles.
- Airbag System Sync: If your airbag warning light is illuminated after installation, a scan tool procedure called ‘Setup SDM Primary Key in BCM’ will be needed to sync the systems. This is only required if the light is on.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and traction control operation.
- No Core Charge: You can keep your old module, as there is no core charge or need to return it.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility
This module, part number 20839063, is a direct replacement for a wide range of GM vehicles and interchanges with numerous part numbers, ensuring a perfect fit. Please confirm your vehicle is on this list. Note that BCM location may vary by model.
Frequently Asked Questions
Frequently Asked Questions
Do I need to program this BCM?
No. We program the module to your vehicle’s VIN before we ship it. It arrives ready to be installed, saving you a trip to the dealer.
Where is the BCM located on my 2010 Traverse?
The BCM is typically found under the driver’s side dashboard, to the left of the steering column. You will likely need to remove the lower dash trim panel to access it.
Will this fix my car’s specific electrical problem?
This module corrects issues directly caused by a failing BCM, such as problems with lights, locks, windows, and security systems. While it solves the most common electrical faults, proper diagnosis is key to ensuring it’s the right part for your repair.
What does ‘no core charge’ mean?
It means you do not have to send your old, faulty BCM back to us. This saves you the hassle and cost of return shipping.
What if the airbag light turns on after I install it?
This is a normal possibility. The new BCM needs to be electronically introduced to the airbag’s computer (SDM). A professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to turn off the light.
Is this a genuine GM part?
This is a high-quality replacement part, programmed with official GM software updates to ensure full compatibility and function for your vehicle.