Restore Full Electrical Function to Your Buick Enclave
If you’re dealing with baffling electrical issues in your 2008-2012 Buick Enclave—like flickering lights, malfunctioning power windows, or a security system that has a mind of its own—a failing Body Control Module (BCM) is the likely culprit. The BCM is the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating problems. This replacement BCM, part number 20839063, is the definitive solution to get your vehicle back to 100% without the exorbitant costs and hassle of a dealership visit.
We offer a professional cloning service that makes this repair as simple as possible. Simply send us your original BCM after purchase. We will transfer the critical vehicle-specific data to this replacement unit and flash it with the latest GM software updates based on your VIN. This means no complex, post-installation programming is required on your end. It’s a direct-fit solution designed to restore your vehicle’s functionality and your peace of mind.
From the Diagnostic Bay: The Case of the Haunted Enclave
I remember a 2011 Enclave that came into my shop with a classic “haunted car” complaint. The owner said the interior lights would pulse randomly, the radio would shut off, and worst of all, he’d find his battery dead every few mornings. He’d already replaced the battery and alternator. After hooking up my scan tool, I saw multiple communication loss codes (U-codes) pointing to the BCM. The real proof was watching the live data stream; the BCM was sending erratic commands even with the key off, causing a parasitic drain that killed the battery. Replacing the BCM with a properly programmed unit solved every single issue. These modules are notorious for internal circuit failure, and this is the exact fix for that scenario.
Is Your Enclave Showing These BCM Failure Signs?
- ✔ Unpredictable behavior from interior or exterior lights (flickering, staying on, or not working at all).
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ The security system engaging randomly or preventing the car from starting.
- ✔ Warning lights for the airbag or traction control system appearing on the dash.
- ✔ Communication error codes, such as U0140, stored in the vehicle’s computer system.
- ✔ A persistent parasitic battery drain that leaves you with a dead battery.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the BCM: On a 2008-2012 Buick Enclave, 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.
- ✔ Remove Trim Panels: Carefully remove any plastic trim panels necessary to access the module. These usually pop off with a trim removal tool.
- ✔ Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed. Then, unbolt the module from its mounting bracket.
- ✔ Install the New BCM: Mount the new, programmed BCM in the same location and securely fasten it. Reconnect all electrical connectors, ensuring they click into place.
- ✔ Final Steps: Re-install the trim panels and reconnect the negative battery terminal. Start the vehicle to confirm the fix.
Important Post-Installation Information
While our cloning service handles the primary programming, some vehicle systems may require a relearn procedure to sync with the new BCM. This is normal. Specifically, a Brake Pedal Position Relearn may be needed for proper brake light and traction control operation. Additionally, if the airbag light is on after installation, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the airbag system. Always consult a factory service manual or a qualified technician if you are unsure about these steps.
Verified Vehicle Compatibility List
This Body Control Module is a direct replacement for a wide range of General Motors vehicles. Please verify your part number and model/year to ensure compatibility. This part is interchangeable with the following 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.
- Buick: Enclave (2008-2012), Lucerne (2006-2011)
- Cadillac: CTS (2008-2013), DTS (2006-2011), Escalade / ESV / EXT (2010), SRX (2007-2009), STS (2010)
- Chevrolet: Avalanche 1500 (2010), Caprice (2011-2013), Captiva Sport (2012), Equinox (2007-2009), Express Van 1500/2500/3500 (2008-2012), Impala (2006-2013), Monte Carlo (2006-2007), Suburban 1500 (2010), Tahoe (2010), Traverse (2009-2012)
- GMC: Acadia (2007-2012), Savana Van 1500/2500/3500 (2008-2012), Yukon / Yukon XL 1500 (2010)
- Hummer: H2 (2008-2009)
- Pontiac: G8 (2008-2009), Torrent (2007-2009)
- Saturn: Outlook (2007-2010), Vue (2008-2010)
Frequently Asked Questions
What is a ‘Cloning Service’ and why do I need it?
Our cloning service transfers the unique, vehicle-specific data (like key information and security settings) from your old BCM to the replacement one. This makes the installation plug-and-play, saving you from a costly and time-consuming trip to the dealership for programming.
Do I need to send you my original BCM?
Yes. For the cloning service to work, we need your original module to extract the necessary data. After you place your order, we will provide instructions on how to send it to us.
Will I get my original part back?
Absolutely. We always return your original module along with the newly programmed replacement unit. We do not keep customer cores.
Why do you also need my VIN if you’re cloning the module?
We use your VIN to ensure the base software on the replacement BCM is updated to the very latest version from GM before we perform the cloning. This gives you the benefit of both data preservation and software improvements.
What happens if my airbag light is on after installation?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag system (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure, which is a quick process for any qualified mechanic.