Restore Full Electrical Function to Your GMC Acadia
Are you dealing with baffling electrical problems in your 2007-2012 GMC Acadia? Flickering lights, malfunctioning power windows, 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 command center for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated issues. This isn’t just an inconvenience; it can compromise your vehicle’s safety and reliability.
This replacement Body Control Module is the definitive solution. We take the guesswork and hassle out of the repair by programming the module specifically to your vehicle’s VIN before it ships. This means it arrives at your door with the latest GM software updates, ready for a straightforward installation. You get a reliable, plug-and-play fix without the expensive trip to the dealership for programming.
Case Study: A Tricky Diagnosis
I remember a 2011 Acadia that rolled into my bay with a truly bizarre list of complaints. The owner said the radio would randomly die, the liftgate wouldn’t open, and the ‘Service StabiliTrak’ message kept appearing. A quick scan showed a dozen communication codes (U-codes), pointing to a network issue. Instead of chasing ghosts, we went straight to the source. The BCM acts as a gateway for these systems. After swapping in a new, correctly programmed BCM like this one, every single issue vanished. It’s a perfect example of how one component can solve a multitude of problems.
Is Your Acadia Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The anti-theft or security light flashing, preventing the engine from starting.
- ✔ Instrument cluster gauges behaving erratically or going dead.
- ✔ Multiple communication Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or U0100.
- ✔ Remote key fob not working correctly.
- ✔ Wipers or other accessories activating on their own.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
- ✔ Locate the BCM: On the 2007-2012 Acadia, the BCM is typically found under the driver’s side of the dashboard, to the left of the steering column. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully 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.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses. Ensure they click into place.
- ✔ Reconnect Power: Reattach the negative battery terminal.
- ✔ Test and Verify: Start the vehicle and test all body functions—windows, locks, lights, radio, etc.—to confirm the repair. Note the post-installation procedures below, as some systems may require a relearn process.
Post-Installation System Checks
Because this 2007-2012 Acadia BCM is the hub for many systems, a couple of quick relearn procedures may be needed after installation. This is normal and ensures all related components communicate properly with the new module.
- Airbag System Sync: If your airbag warning light is on after the swap, a simple “Setup SDM Primary Key in BCM” procedure is required. This syncs the airbag system with the new BCM and can be done with a compatible professional scan tool.
- Brake Pedal Position Relearn: To ensure your brake lights and traction control system function correctly, a brake pedal position sensor relearn might be necessary. This is also performed with a scan tool.
Disclaimer: While these steps are common, procedures can vary slightly. We always recommend consulting a factory service manual for your specific vehicle.
Will This Fit My Vehicle?
This module is a direct replacement for the 2007-2012 Acadia BCM and is also compatible with a wide array of other GM vehicles. It replaces a long list of original part numbers, ensuring broad applicability. If your original module carries part number 20921435 or any of the following, this is the correct part for you: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, and 95151084. It fits models like the Enclave, Traverse, Outlook, Equinox, Tahoe, Yukon, Impala, and various Express/Savana vans. Please verify your part number to guarantee fitment.