Restore Your Vehicle’s Electronic Stability with a Reliable BCM
If your 2011-2013 Chevrolet Caprice is plagued by baffling electrical problems—like power windows with a mind of their own, flickering interior or exterior lights, a security system that randomly immobilizes the car, or strange warning messages on your dash—the culprit is often a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can create chaos, making your car unreliable and frustrating to drive. This isn’t just an inconvenience; it can be a serious safety issue when critical systems like lighting and security are compromised.
We offer a dependable and straightforward solution. This Body Control Module, part number 20839063, is the correct component for your vehicle. More importantly, we eliminate the biggest hurdle in this repair: the programming. With our professional Cloning Service, we transfer all the critical, vehicle-specific data from your original module directly to this replacement unit. This means no expensive trips to the dealership, no surprise programming fees, and no compatibility headaches. You get a component that is truly plug-and-play, programmed specifically for your car’s VIN and options.
From the Diagnostic Bay: The Case of the Ghostly Gremlins
I remember a 2012 Caprice PPV (Police Pursuit Vehicle) that came into my shop. The department was ready to sideline it. The complaint list was long: intermittent no-start, the radio would turn on by itself, and the dome lights would stay on, draining the battery. They had already replaced the battery and alternator to no avail. Diagnostics showed a flood of communication error codes (U-codes) pointing to a network issue. After isolating various modules, I traced the network instability back to the BCM. Water intrusion from a leaky windshield cowl seal had caused corrosion on the BCM’s circuit board, leading to these unpredictable, ghostly failures. By providing a cloned BCM, we got the cruiser back in service the next day, saving the department the high cost and downtime of a dealership repair.
Is Your Caprice Showing These BCM Failure Signs?
A failing Body Control Module can manifest in numerous ways. If you’re experiencing any of the following, your BCM is the likely cause:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ The security system light is flashing, and the engine won’t crank (theft-deterrent active).
- ✔ The horn honks unexpectedly or doesn’t work when pressed.
- ✔ Wipers operate randomly or at the wrong speed.
- ✔ Multiple communication DTCs, such as U0140 (Lost Communication with BCM).
- ✔ Dash warning lights for various systems appear without a clear cause.
A Straightforward Guide to BCM Replacement
Installing your cloned BCM is a manageable job for a DIY enthusiast. While the exact location can vary, on the 2011-2013 Caprice, the BCM is typically located in the passenger compartment. Always consult a service manual for your specific vehicle.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On the Caprice, you’ll generally find the BCM behind the dash panel, often on the driver’s or passenger’s side. You may need to remove a lower dash cover or glove box for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely fasten it. Reconnect all electrical connectors, ensuring they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Post-Install Checks: Start the vehicle and test all body functions—windows, locks, lights, wipers, etc. As noted in our procedures, a relearn for the airbag or brake pedal position sensor may be required if you see specific warning lights.
Post-Installation Procedures & Important Notes
Our cloning service makes this repair as simple as possible, but some vehicle systems may require recalibration after the BCM is replaced. Please be aware of the following:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, the brake pedal position sensor may need to be recalibrated to ensure correct brake light operation and to satisfy the traction control system.
- Core Return: Our cloning service requires your original module. After your purchase, we will provide instructions for sending it to us. We clone the data to the replacement unit and ship BOTH modules back to you. We do not keep your original part.
Verified Fitment Across Multiple GM Platforms
This BCM is a direct replacement for part number 20839063 and is compatible with a wide range of GM vehicles, provided the part number on your original module is listed below. It supersedes 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.
Primary Fitment:
- 2011-2013 Chevrolet Caprice
Also fits select models of: Acadia, Avalanche, Captiva Sport, CTS, DTS, Enclave, Equinox, Escalade, Express Van, G8, Hummer H2, Impala, Lucerne, Monte Carlo, Outlook, Savana Van, SRX, STS, Suburban, Tahoe, Torrent, Traverse, Vue, Yukon. Please verify your original part number to ensure compatibility.
Frequently Asked Questions
Frequently Asked Questions
What is a BCM cloning service?
Cloning is a process where we extract the exact software and vehicle-specific configuration data (like VIN, mileage, and optional features) from your original BCM and transfer it to the replacement module. This makes the new unit an identical twin of the old one, ensuring seamless integration with your vehicle without needing dealer intervention.
Why is cloning better than simple VIN programming?
While programming with a VIN provides the base software, it doesn’t always capture all the unique options and security keys specific to your car. Cloning transfers everything, including immobilizer data and settings for features your car was built with, resulting in a true plug-and-play experience and preventing potential compatibility issues.
What if my original BCM is completely dead or water damaged?
In many cases, even if the module is non-functional in the vehicle, our technicians can still access the memory chip directly to retrieve the necessary data. Please contact us with details about your module’s condition before ordering if you suspect severe damage.
Do I need to take my car to the dealer after installation?
No! Our cloning service is designed to eliminate the need for dealer programming. The module will arrive ready to install. The only exception is the potential need for a post-install relearn procedure (like for the airbag system), which can often be done by an independent shop with a professional-grade scan tool.
What does the BCM control on my Caprice?
The BCM is a major hub. It manages functions like power windows, power door locks, interior and exterior lighting, the alarm/security system, windshield wipers, the horn, and it communicates with other modules to share data about the vehicle’s status.
How do I send my original module to you for the service?
After you complete your purchase, we will email you detailed, step-by-step instructions and a shipping address. You simply package your original BCM securely and send it to our facility. We perform the service quickly and ship both modules back to you.
Is this a new or used part?
This is a quality, tested, and guaranteed functional used component. Each module is inspected and verified to be in excellent working condition before being programmed for your vehicle.