Tired of Electrical Gremlins in Your GM Vehicle?
Are your power windows acting possessed? Do the door locks have a mind of their own? Is your security light flashing, or are you dealing with other bizarre, intermittent electrical issues? Before you spend a fortune on diagnostic fees, the culprit is likely a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can cause chaos. This is the definitive solution to restore order and get your vehicle operating as it should.
A Real-World Scenario from My Shop
Just last month, a 2011 Express 3500 work van came in that was driving the owner crazy. The radio would turn on and off, the dome light would flicker, and sometimes the power locks wouldn’t respond. He’d already replaced the battery and checked fuses. After hooking up my scan tool, I saw a dozen communication error codes pointing to the BCM. These modules, especially on high-use commercial vans, often fail from heat cycles and vibration. We swapped in a VIN-programmed BCM like this one, and every single issue was resolved instantly. It’s a common failure I’ve seen hundreds of times.
The Direct-Fit Solution for Your 2008-2012 Express 3500 BCM
This isn’t just a generic part off a shelf. We provide a fully programmed Body Control Module, flashed with the latest official GM software updates specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and our technicians will handle the programming before it ships. This crucial step ensures that the BCM communicates perfectly with your vehicle’s other systems, saving you a costly trip to the dealership for programming.
Symptoms of a Failing BCM This Part Corrects:
- ✔ Erratic or non-functional power windows, mirrors, and door locks.
- ✔ Malfunctioning interior or exterior lights (e.g., dome lights, headlights).
- ✔ Security system faults or anti-theft light staying on.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ False warnings on the dashboard instrument cluster.
- ✔ Communication errors with other vehicle modules (DTCs).
Installation and Post-Install Procedures
Replacing the BCM is a manageable job for a DIY enthusiast or any professional mechanic. While the physical swap is straightforward, a few critical post-installation steps are required to ensure full system functionality and safety.
- Safety First: Always disconnect the negative battery terminal before starting any work on your vehicle’s electrical system.
- Locate and Replace: On most Express/Savana vans, the BCM is located in the center dash area. Carefully disconnect the wiring harnesses, unbolt the old module, and install the new one in its place.
- Reconnect Battery: Once the new module is securely installed, reconnect the negative battery terminal.
- Airbag System Reset (Required): After installation, the airbag warning light will be on. You must perform the ‘Setup SDM Primary Key in BCM’ procedure using a compatible bi-directional diagnostic tool. This re-establishes the security handshake between the new BCM and the airbag module.
- Brake Pedal Position Sensor Relearn (If Applicable): Some vehicles may require a brake pedal position sensor recalibration. If you notice any issues with brake light operation or cruise control, this procedure should be performed with a diagnostic tool.
Guaranteed Fitment & Part Number Compatibility
This BCM is a direct replacement for a wide range of GM vehicles and part numbers. Please verify your vehicle is on the list below. 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 (FAQ)
- Q: How do I provide my VIN for programming?
- A: After you complete your purchase, simply send us a message with your 17-digit VIN. We will program the module before shipping it to you.
- Q: Is this part truly plug-and-play?
- A: The module is programmed to be plug-and-play for your vehicle’s main functions. However, as noted above, a required security relearn procedure for the airbag system must be performed with a diagnostic tool.
- Q: What tools are needed for the installation?
- A: You will need basic hand tools like a socket set and screwdrivers to access and replace the module. A bi-directional scan tool is required for the post-installation airbag and brake sensor procedures.
- Q: Will this fix my specific electrical problem?
- A: This module corrects issues directly controlled by the BCM, such as power accessories, lighting, and security. If you have confirmed through diagnosis that the BCM is the fault, this part is the solution.
- Q: Do I need to send my old BCM back (core charge)?
- A: No core charge is required for this purchase. You can keep or responsibly dispose of your old module.