Restore Full Electrical Function to Your Buick Enclave
Are you dealing with baffling electrical issues in your 2008-2012 Buick Enclave? Flickering lights, malfunctioning power windows, or a security system that acts on its own are classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can create a cascade of frustrating and unpredictable problems. This isn’t just an annoyance; it can affect vehicle security and safety. This replacement Body Control Module, part number 15948438, is the definitive solution to restore order and reliability to your vehicle.
A Technician’s Notebook: The Parasitic Draw Puzzle
I once had a 2011 Enclave in my bay with a battery that would die every two days. The owner had already replaced the battery and alternator, but the problem persisted. Standard parasitic draw tests were inconclusive at first. After letting the vehicle sit for over an hour to allow all modules to sleep, I noticed the BCM was still drawing a small but steady current. It wasn’t shutting down properly, causing the slow drain. This internal short is a common failure mode I’ve seen in dozens of these units. Replacing the faulty module with a correctly programmed 2008-2012 Enclave BCM solved the mystery drain and got the customer back on the road with confidence.
Common Signs of a Failing BCM
If your vehicle is exhibiting any of these symptoms, a failing BCM is the likely culprit. Replacing it can resolve multiple issues at once, saving you from chasing down individual electrical gremlins.
- ✔ Intermittent or non-working power windows, door locks, and mirrors.
- ✔ Interior dome lights or exterior lamps staying on or not working at all.
- ✔ Erratic instrument cluster behavior or warning lights (like the security light).
- ✔ Key fob not responding or vehicle security system faults.
- ✔ Communication error codes, particularly U-codes (e.g., U0140, U0155) when scanned.
- ✔ Unexplained battery drain, leading to a no-start condition.
Your Straightforward BCM Installation Guide
We make this repair as simple as possible by programming the module to your vehicle’s VIN before it ships. This eliminates the need for expensive dealer tools for programming, making it a job you can tackle at home.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning.
- Locate the BCM: On the 2008-2012 Buick Enclave, the BCM is typically located on the left-hand (driver’s) side of the dashboard, often behind the lower dash panel near the steering column.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM and securely plug in all the electrical connectors. Ensure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair.
Important Post-Installation Information
While our VIN programming handles the majority of the setup, some GM vehicles require additional steps after installation for full system integration. These are known as ‘relearn’ or ‘setup’ procedures.
- Airbag System Sync: If your airbag 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 required to ensure correct brake light operation and to prevent issues with the traction control system.
Disclaimer: We strongly recommend consulting a factory service manual or a professional technician if you are unsure about any part of the installation or post-install procedures.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 15948438 and is compatible with a wide range of GM vehicles. Please verify your part number or contact us with your VIN to ensure an exact match. This module fits the following models, among others:
ACADIA 07-12 Body Control (BCM); (LH dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
IMPALA 06-12 Body Control (BCM); (LH dash)
EQUINOX 07-09 Body Control (BCM); (center dash)
TAHOE 10 Body Control (BCM); (under steering column), ID 25892622 or 20815898
EXPRESS/SAVANA VANS 08-12 Body Control (BCM); (center dash)
CTS 08-13 Body Control (BCM); LH dash
…and many more. This module 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
What exactly does a Body Control Module do?
The BCM is a computer that acts as the brain for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, the security system, and more. When it fails, these systems can become erratic.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions to reply with your 17-digit Vehicle Identification Number (VIN). We cannot ship your module until we receive this information, as we program it specifically for your vehicle’s options and security protocols.
Is this part difficult to install for a DIYer?
For someone with basic mechanical skills, this is a very manageable job. The main challenge is typically accessing the module’s location. Since we handle all the programming, you won’t need any special computer equipment, which is the hardest part of the process for most people.
What if my airbag or brake light is on after installation?
This can happen on certain GM models. It doesn’t mean the part is defective. It simply means an additional ‘relearn’ or ‘sync’ procedure is required, as mentioned in our post-installation notes. This requires a bi-directional scan tool, which most professional repair shops have.
Do I need to send my old BCM back?
No. We do not require you to return your original module. There is no core charge associated with this purchase, so you can keep your old part.