Restore Control and Eliminate Electrical Gremlins in Your Impala
Are you chasing frustrating electrical issues in your 2006-2013 Chevrolet Impala? Flickering lights, power windows with a mind of their own, or a persistent “Service Theft Deterrent System” message are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause widespread, confusing problems. This isn’t just an annoyance; it can affect vehicle security and safety systems. I’ve seen firsthand how a failing BCM can mimic a dozen other problems, leading to wasted time and money on incorrect diagnoses.
This is your direct-fit, reliable solution. We provide a genuine GM Body Control Module, part number 20815898, that arrives at your door fully programmed to your vehicle’s specific VIN. This means we load the latest, most stable software from GM before we ship, ensuring seamless integration. You get to skip the expensive trip to the dealership for programming and get your Impala back to 100% functionality quickly and affordably.
A Technician’s Notebook: The 2011 Impala That Wouldn’t Cooperate
A customer brought in a 2011 Impala with a laundry list of complaints: the radio would cut out, the driver’s side window worked intermittently, and sometimes the security light would stay on, preventing the car from starting. They had already replaced the battery and checked the alternator. After hooking up my scan tool, I saw several communication error codes (U-codes) pointing to the BCM. Instead of a costly dealer replacement and programming appointment, we ordered a VIN-programmed module. The swap took less than 30 minutes, and every single issue was resolved instantly. It’s a prime example of how the right part, correctly prepared, makes all the difference.
Common Signs of a Failing BCM
If your vehicle is experiencing any of the following, a faulty BCM is the most likely culprit. In my shop, over 80% of these symptoms on GM vehicles of this era trace back to this module.
- ✔ Erratic or non-functional power windows, door locks, and interior/exterior lights.
- ✔ The “Service Theft Deterrent System” or “Service Security System” message is displayed on the dash.
- ✔ The security light stays on, leading to a no-start or crank-no-start condition.
- ✔ Horn, wipers, or radio function unpredictably.
- ✔ Communication DTCs are present (e.g., U0140, U0155).
- ✔ False warnings for other systems, like tire pressure or ABS.
A Straightforward Guide to Your Impala BCM Installation
Replacing the 2006-2013 Impala Body Control Module is a manageable job for a DIYer with basic tools. The BCM is typically located on the left-hand (driver’s) side of the dashboard, often behind the lower trim panel near the steering column.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to fully discharge.
- Access the Module: Remove the lower dash panel below the steering wheel. This may require removing a few screws or clips.
- Locate the BCM: Identify the old BCM. It’s a small plastic box with several large multi-pin electrical connectors plugged into it.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring they click into place.
- Power Up and Test: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting the engine) and test all body functions: windows, locks, lights, wipers, etc.
Post-Installation Procedures: What to Expect
Because this module is pre-programmed, most vehicles will not require any additional steps. However, in some cases, a ‘relearn’ or ‘sync’ procedure may be necessary. This is normal and depends on your vehicle’s specific configuration.
- Airbag System Sync: If the airbag (SRS) warning light is on after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure proper brake light and traction control operation. This also requires a capable scan tool.
Disclaimer: Always consult a factory service manual for procedures specific to your vehicle’s year and model.
Verified Vehicle Compatibility
This module is a direct replacement for part number 20815898 and a wide range of other interchangeable part numbers. While it is a perfect fit for the 2006-2013 Impala Body Control Module, it also fits many other GM vehicles. Please verify your part number or contact us with your VIN to confirm compatibility.
Compatible 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
Partial Fitment List:
- Chevrolet Impala (2006-2013)
- Chevrolet Monte Carlo (2006-2007)
- Chevrolet Equinox (2007-2009)
- Chevrolet Express Van (2008-2012)
- GMC Savana Van (2008-2012)
- Cadillac DTS (2006-2011) & CTS (2008-2013)
- GMC Acadia (2007-2012)
- And many more GM trucks, vans, and SUVs.
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive it.
Is this a simple plug-and-play installation?
Yes! Because we program the module to your VIN before shipping, it is a direct plug-in replacement. In most cases, no further programming is required. Some vehicles may require a simple relearn procedure as noted above.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your original module.
What if my part number isn’t listed but my vehicle is?
The best way to ensure compatibility is to match the part number from your original module. If you are unsure, please contact us with your VIN, and our experts will verify the correct part for you.
Will this fix my “Service Theft Deterrent System” warning?
In the vast majority of cases, a faulty BCM is the cause of this specific warning on 2006-2013 Impalas and other GM vehicles. Replacing it with our programmed module is the definitive fix for this common issue.