Restore Full Functionality to Your Buick Enclave
Are you dealing with baffling electrical problems in your 2008-2012 Buick Enclave? One minute the power windows work, the next they don’t. Maybe the interior lights are flickering, the security system is acting up, or the radio presets keep resetting. These aren’t separate issues; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of frustrating and unpredictable problems.
This is a direct-fit replacement Body Control Module, arriving at your door fully programmed to your vehicle’s specific VIN. We handle the complex part—flashing it with the latest GM software—so you don’t have to. This means no expensive trip to the dealership for programming. You get a reliable part that’s ready for installation right out of the box, designed to restore the seamless operation you expect from your Enclave.
A Technician’s Notebook: The Ghost in the Machine
I once had a 2011 Enclave in my bay that was driving the owner crazy. The power liftgate would open on its own, the dash lights would dim and brighten randomly, and the car intermittently wouldn’t start. The customer had already replaced the battery and checked the alternator. After hooking up my scan tool, I saw a dozen communication codes (U-codes) pointing to the BCM. A failing BCM can send garbled data across the vehicle’s network, creating these ‘ghost’ problems. Installing a new, properly programmed 2008-2012 Enclave BCM resolved every single issue. It’s a perfect example of how one component can be the root of so much electronic chaos.
Is Your Enclave Showing These BCM Failure Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, your Body Control Module is the likely culprit:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior (flickering, staying on, or not turning on).
- ✔ Security system faults or the anti-theft light staying illuminated.
- ✔ Remote keyless entry (RKE) fob not working correctly.
- ✔ Instrument cluster gauges behaving erratically or not working at all.
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module).
- ✔ A no-start condition where the engine cranks but won’t fire up due to a security signal issue.
Your Straightforward BCM Installation Guide
For the confident DIYer or professional mechanic, swapping the BCM is a manageable job. In the 2008-2012 Enclave, the BCM is typically located on the left-hand (driver’s) side of the dash. While this guide provides a general overview, always consult a vehicle-specific service manual for detailed instructions.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all modules are powered down.
- Locate the BCM: On most Enclave models, you’ll need to remove the lower dash panel beneath the steering column to access the module.
- 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.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test the functions: power windows, locks, lights, etc.
- Perform Relearn Procedures: If the airbag light is on or brake functions seem off, you may need to perform the post-installation procedures noted below with a capable scan tool.
Important Post-Installation Steps
Important Post-Installation Steps
While our BCM is pre-programmed, your vehicle’s systems may require synchronization after installation:
Verified Fitment Across Multiple GM Models
This module is a direct replacement for part number 15872421 and is compatible with a wide range of GM vehicles. Please verify your original part number against our list. This module fits the following vehicles, among others:
- Buick Enclave (2008-2012) – LH dash
- GMC Acadia (2007-2012) – LH dash
- Chevrolet Traverse (2009-2012) – LH dash
- Saturn Outlook (2007-2010) – Center dash
- Cadillac, Chevrolet, GMC Trucks/SUVs & Vans (Various Years) – Check the detailed fitment list and your part number to confirm.
This part replaces 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
Frequently Asked Questions
Important Post-Installation Steps
While our BCM is pre-programmed, your vehicle’s systems may require synchronization after installation: