Restore Full Functionality to Your 2007-2012 GMC Acadia
If you’re dealing with baffling electrical issues in your GMC Acadia—like flickering lights, malfunctioning power windows, or a security system that prevents the engine from starting—you’ve likely met the culprit: a failing Body Control Module (BCM). As the central computer for your vehicle’s comfort and convenience features, a faulty BCM can cause a cascade of frustrating problems. This isn’t just an inconvenience; it can affect your vehicle’s security and safety. We offer a dependable, straightforward solution: a replacement Body Control Module, professionally programmed with the latest GM software updates specifically for your vehicle’s VIN.
A Technician’s Notebook: The Case of the Haunted Acadia
A customer brought in a 2011 Acadia with a list of symptoms that sounded like something from a ghost story. The interior lights would pulse, the radio would turn on and off by itself, and worst of all, the vehicle would intermittently refuse to start, leaving the security light flashing on the dash. They had already replaced the battery and checked the alternator. After hooking up my scan tool, I found multiple U-codes (U0140, U0155) indicating a loss of communication with the BCM. Instead of guessing, we inspected the BCM connections and found no issues, confirming the module itself had failed internally. Replacing it with a VIN-programmed unit like this one resolved every single issue instantly. This is a classic failure I’ve seen dozens of times on this platform.
Is Your Acadia Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re noticing any of the following, it’s a strong indicator that your module needs attention:
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system light stays on, and the engine won’t crank (anti-theft active).
- ✔ The key fob is no longer recognized by the vehicle.
- ✔ Warning lights for various systems (ABS, Airbag, Traction Control) appear on the dash without a clear cause.
- ✔ Diagnostic scan tools are unable to communicate with the BCM, often showing U-codes.
Your Straightforward BCM Installation Guide
Installing your new 2007-2012 Acadia BCM is a manageable job for a confident DIYer. The BCM is typically located on the left-hand (driver’s) side of the dash. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Access the Module: You will likely need to remove the lower dash panel beneath the steering column to gain access to the BCM. It’s usually secured with a few screws or clips.
- Identify the BCM: Locate the module. It will have several large electrical connectors attached to it. Take a picture with your phone before disconnecting anything to help with reassembly.
- Disconnect and Remove: Carefully release the locking tabs on each electrical connector and pull them straight out. Then, unbolt or unclip the old BCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors, ensuring they click securely into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, and wipers—to confirm proper operation before reassembling the dash panels.
Important Post-Installation Steps
Because this module is pre-programmed, you’ll avoid a trip to the dealer for initial setup. However, depending on your vehicle’s specific configuration, a couple of additional procedures might be necessary:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible high-level scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure accurate brake light and stability control function. This is also performed with a professional scan tool.
Disclaimer: These are general guidelines. Always refer to a factory service manual for your specific vehicle for detailed instructions and torque specs.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide range of GM vehicles. Please verify your part number and vehicle model from the list below to ensure perfect fitment. This unit is compatible with part number 15299986 and supersedes the following part numbers: 10382479, 15093910, 15276271, 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, and 95151084.
ENCLAVE 08-12 Body Control (BCM); (LH dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
OUTLOOK 07-10 Body Control (BCM); (center dash)
IMPALA 06-12 Body Control (BCM); (LH dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
LUCERNE 06-11 Body Control (BCM); (right side dash)
DTS 06-11 Body Control (BCM); (RH center dash)
CTS 08-13 Body Control (BCM); LH dash
… and many more GM trucks, vans, and SUVs as listed in the original fitment data.
Frequently Asked Questions
Frequently Asked Questions
2007-2012 Acadia BCM
Will this fix my ‘Service StabiliTrak’ or ‘Service Traction Control’ message?
It can, but not always. While a faulty can cause these warnings by sending bad data, the issue could also be a wheel speed sensor or steering angle sensor. A proper diagnosis is key, but if you have other BCM-related symptoms, this is a likely solution.