If your 2006-2013 Chevy Impala is acting possessed—with flickering lights, malfunctioning power windows, a stubborn security system, or intermittent starting issues—you’ve likely met the frustrating reality of a failing Body Control Module (BCM). As the central command for your vehicle’s electronics, when the BCM goes down, it takes comfort, convenience, and sometimes even vehicle operation with it. I’ve seen it hundreds of times in my shop: a customer comes in after replacing a battery and alternator, yet the gremlins persist. The real culprit? This little black box.
But the fix doesn’t have to involve expensive dealership visits and programming fees. This is a direct-fit replacement BCM for your Impala, and it comes with our expert Cloning Service. This is the simplest, most effective solution for both DIYers and professional technicians. You send us your original BCM, and we transfer all of its critical, vehicle-specific data—like key information and security settings—directly to this replacement unit. The module you receive back is a true plug-and-play solution, ready for installation right out of the box. No programming, no relearn procedures at the dealer, just a straightforward fix.
Case Study: A Tricky Diagnosis
A 2011 Impala was towed to my bay with a classic no-crank, no-start condition. The security light on the dash was flashing, a dead giveaway for a Passlock or BCM issue. The owner had already spent a small fortune on a new key and a battery. A quick scan with my diagnostic tool revealed code U0140 – Lost Communication with Body Control Module. Instead of just ordering a new BCM from the dealer, which would have required towing the car there for programming, we used our cloning service. We had the customer’s original BCM overnighted to us, cloned the data, and sent the replacement back. The customer installed it in 30 minutes, and the car fired right up. It’s a prime example of how this service saves time, money, and a whole lot of headaches.
Is Your Impala Showing These BCM Failure Signs?
A failing BCM can cause a wide range of confusing electrical problems. Here are some of the most common symptoms I’ve diagnosed over the years:
- âś” Erratic or non-functional power windows, door locks, and interior lights.
- âś” The security or anti-theft light stays on or flashes, preventing the car from starting.
- âś” Dashboard gauges behaving erratically or not working at all.
- âś” Horn honking unexpectedly or not working when pressed.
- âś” Communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or other ‘U’ codes.
- âś” Rapid battery drain with no other obvious cause.
A Straightforward Guide to Your BCM Swap
Replacing the 2006-2013 Impala Body Control Module is a manageable job for a DIYer with basic tools. On the Impala, it’s typically located on the left (driver’s) side of the dashboard, often near the steering column.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts.
- Access the Module: You will likely need to remove the lower dash panel beneath the steering wheel to gain access to the BCM.
- 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, cloned BCM in the same position and reconnect all electrical connectors firmly until they click into place.
- Final Steps: Reinstall the dash panel and reconnect the negative battery terminal. Start the car and test all functions—lights, locks, windows, etc.
Important Post-Installation Notes
Our cloning service makes this a plug-and-play process. However, in some GM vehicles, additional steps may be required:
- Airbag System Sync: If the airbag 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 certain models, a brake pedal position sensor relearn might be necessary for proper brake light and traction control operation.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified professional if you are unsure about any step.
Verified Vehicle Compatibility List
This BCM is a direct replacement for part number 20839063 and is compatible with a wide range of GM vehicles. It also interchanges with the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084. Please verify your part number before ordering.
This module fits many models including, but not limited to: Chevrolet Impala (2006-2013), Equinox, Express, Tahoe, Traverse; GMC Acadia, Savana, Yukon; Cadillac CTS, DTS, Escalade; Buick Lucerne, Enclave; and more. Please match your part number for guaranteed fitment.
Frequently Asked Questions
What is a BCM cloning service?
Our cloning service is a process where we transfer the exact software, VIN, key codes, and security information from your original BCM to the replacement unit. This makes the new module a perfect electronic match for your vehicle, eliminating the need for expensive and time-consuming dealership programming.
Do I need to program this module after I receive it?
No. Because we clone the data from your original module, this replacement BCM is delivered to you ready for installation. It is a true plug-and-play solution, saving you a trip to the dealer.
Where is the BCM located on my 2006-2013 Impala?
On most 8th and 9th generation Impalas, the Body Control Module is located inside the cabin, on the driver’s side. You’ll typically find it mounted to the left of the steering column, accessible after removing the lower knee bolster panel.
What happens to my original module?
The cloning service requires your original module to extract the data. Once the service is complete, we always return your original module to you along with the newly programmed replacement unit. We do not keep it.
What if my airbag light comes on after installation?
This is uncommon, but if it happens, it means the BCM needs to be electronically synced with the airbag’s computer (SDM). This requires a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure, which is a quick task for any competent repair shop.