Restore Your GM Vehicle’s Electrical System with a Reliable, Programmed BCM
Are you dealing with baffling electrical issues in your 2007-2012 GMC Acadia? Flickering lights, malfunctioning power windows and locks, a security system that has a mind of its own, or even a vehicle that refuses to start can all point to one culprit: a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can turn your daily drive into a frustrating and unpredictable experience. This isn’t just an annoyance; it’s a matter of function and safety. We offer a dependable and straightforward solution: a replacement BCM, part number 20864767, that arrives at your door pre-programmed for your specific vehicle.
Case Study: The Ghost in the Acadia
I recall a 2011 GMC Acadia that came into my shop with a list of symptoms that sounded like something out of a horror movie. The owner said the dome lights would flicker randomly, the radio would shut off, and occasionally the liftgate wouldn’t open. He’d been to two other shops that couldn’t find the source. After connecting my scan tool, I saw a storm of U-codes (communication errors), specifically a U0140, indicating a loss of communication with the BCM. A simple wiggle test of the BCM connectors confirmed it was internally shorted. Replacing the module fixed every single issue. These complex symptoms almost always lead back to this central computer.
Forget the expensive trip to the dealership. We eliminate the most difficult part of the repair process. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this module with the latest GM software updates specific to your Acadia. This ensures that the BCM communicates perfectly with your vehicle’s other systems right out of the box, saving you hundreds in dealer programming fees and diagnostic time. This is the professional-grade fix made simple for both seasoned mechanics and first-time DIYers.
Is Your Acadia Showing These Signs of BCM Failure?
- ✔ Unpredictable interior or exterior light behavior (flickering, staying on, or not working at all).
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ The security system or keyless entry failing to work correctly, or the alarm sounding for no reason.
- ✔ Instrument panel gauges sweeping, warning lights flashing, or the driver information center displaying errors.
- ✔ A no-start condition where the engine cranks but won’t fire, often accompanied by a security light.
- ✔ Communication error codes, such as U0140, U0155, or other U-codes, stored in the system.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes to allow all systems to power down completely.
- ✔ Locate the BCM: In the 2007-2012 GMC Acadia, the BCM is typically located on the left-hand (driver’s) side of the dash, often behind the lower dash 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 to avoid scratching.
- ✔ Disconnect and Remove: 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 and remove it from the vehicle.
- ✔ Install the New BCM: Mount your new, pre-programmed BCM in the same location and reconnect all electrical connectors, ensuring they click securely into place.
- ✔ Reconnect and Test: Reinstall any trim panels you removed. Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair.
Important Post-Installation Information
While our VIN programming handles the primary setup, some GM vehicles require a final handshake between modules after installation. Depending on your specific model and options, you may need a professional scan tool to perform one or both of the following relearn procedures:
- Airbag System Sync: If your airbag/SRS warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the new BCM with the airbag system. This is a critical safety step.
- Brake Pedal Position Relearn: To ensure your brake lights and traction control system function correctly, a brake pedal position sensor recalibration may be necessary.
Disclaimer: We strongly recommend consulting a factory service manual or a qualified technician if you are unsure about any part of the installation or relearn process.
Verified Fitment For These GM Vehicles
This Body Control Module is a direct replacement for part number 20864767 and is compatible with a wide range of General Motors vehicles. It interchanges with part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084. Please confirm your part number or contact us with your VIN to ensure compatibility for models including:
- ACADIA 07-12 (LH dash)
- ENCLAVE 08-12 (LH dash)
- TRAVERSE 09-12 (LH dash)
- OUTLOOK 07-10 (center dash)
- IMPALA 06-12 (LH dash)
- MONTE CARLO 06-07 (LH steering column)
- EXPRESS & SAVANA VANS 08-12
- TAHOE, YUKON, SUBURBAN, ESCALADE 10 (confirm ID)
- And many more listed in the fitment guide.
Frequently Asked Questions
What exactly does a Body Control Module do?
The BCM is a computer that controls the non-engine related functions in your vehicle. This includes power windows, power mirrors, air conditioning, the instrument cluster, interior and exterior lighting, security systems, and more. It acts as the central command for all passenger comfort and convenience features.
Is this BCM truly plug-and-play?
Yes, for the most part. We program it to your VIN, which handles the main software configuration. This allows the vehicle to start and run. However, as noted, some vehicles may require additional minor ‘relearn’ procedures for systems like the airbags or brake sensor to fully sync with the new module.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically find this on your vehicle’s registration, insurance card, or on a plate on the driver’s side dashboard visible through the windshield.
Will this fix my specific electrical problem?
If your vehicle is exhibiting multiple, seemingly unrelated electrical symptoms like those listed above, a failing BCM is a very likely cause. A proper diagnosis with a scan tool is the best way to confirm, but the symptoms are a strong indicator. This module is designed to resolve those common BCM-related failures.
What tools are needed for the installation?
Basic hand tools are usually all that’s required. A socket set, a screwdriver, and a plastic trim removal tool are recommended to avoid damaging your dashboard panels. No special electronic tools are needed for the physical installation.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your original module, which can be helpful if you ever need to reference it.