Is Your Chevy Traverse Experiencing Strange Electrical Problems?
If your 2009-2012 Chevrolet Traverse is suffering from a host of baffling electrical issues, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central nervous system for your vehicle’s body electronics, managing everything from your power windows and door locks to the interior lights and security system. When it starts to fail, it can create a cascade of problems that are frustrating and difficult to diagnose, often mimicking other component failures.
From the Diagnostic Bay
We had a 2011 Traverse come into the shop with the classic signs: intermittent dash lights, the radio turning on and off by itself, and a power liftgate that had a mind of its own. The owner had already replaced the battery and checked all the fuses, but the problems persisted. A quick scan showed multiple communication errors pointing towards the BCM. A failing BCM can send confusing signals across the vehicle’s network, making it seem like multiple unrelated parts are failing at once. Replacing the BCM with a properly programmed unit solved every single issue instantly. It’s a reminder that when you see multiple, random electrical gremlins, the central controller is often the root cause.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic behavior from interior or exterior lights (flickering, staying on, or not turning on).
- ✔ The security system or keyless entry malfunctioning or setting off false alarms.
- ✔ Dashboard warning lights appearing randomly.
- ✔ Issues with the radio, climate control, or instrument cluster.
- ✔ In severe cases, a no-start condition where the vehicle won’t crank.
The Direct-Fit Solution: A Programmed 2009-2012 Traverse BCM
Don’t let a faulty module keep your vehicle off the road. This Body Control Module, part number 20839063, is the definitive solution to restore your Traverse’s functionality. We take the guesswork and hassle out of the repair process. Unlike a generic module from a dealership or parts store, this BCM comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This means it’s ready for installation right out of the box, saving you a costly trip to the dealer for programming.
Simply provide us with your VIN during checkout, and our technicians will flash the module with the latest GM software updates specific to your Traverse’s options and features. This ensures seamless communication between all your vehicle’s systems and restores everything to factory-correct operation.
Installation and Post-Install Considerations
Installation is straightforward for a knowledgeable DIYer or any professional technician. The BCM is typically located under the driver’s side of the dashboard. While our programming handles the most critical step, some vehicles may require additional relearn procedures after the new module is installed. These are simple procedures that can be performed with a capable bi-directional scan tool.
- Airbag System Sync: If the airbag light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: A brake pedal position sensor recalibration may be necessary to ensure proper function of the brake lights and stability control systems.
This module is a direct replacement for a wide range of GM part numbers, ensuring broad compatibility across many models beyond the Traverse, including the Acadia, Enclave, Equinox, and various Express/Savana vans. Please verify your original part number against the extensive list provided to ensure perfect fitment.
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. We program the module to your vehicle’s VIN before we ship it. This makes the unit ready for installation upon arrival, saving you time and the expense of dealer programming.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship the module until we receive this information, as the programming is specific to your exact vehicle.
Is this a difficult part to install?
For someone with moderate mechanical experience, the physical replacement is not overly difficult. It’s typically located under the dash. The most important part is the programming, which we handle for you. Some post-installation relearn procedures may be required with a scan tool.
What if I have an airbag light after installation?
This is a known possibility. It simply means the new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a professional-grade scan tool to resolve this.
Is there a core charge for my old BCM?
No, there is no core charge for this part. You can keep your original module without needing to send it back.