If your 2008-2012 Express 3500 Van is suddenly plagued by bizarre electrical issues—like power windows with a mind of their own, flickering interior lights, or a security system that prevents the engine from starting—you’re likely dealing with a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty BCM can bring a reliable workhorse to a dead stop. It’s the central hub for your vehicle’s body electronics, and when it fails, chaos ensues.
Forget the expensive trip to the dealership and the hassle of programming a new module from scratch. This is a professional cloning service for the BCM, part number 15299986. We transfer the exact data from your original module to this replacement unit, ensuring it’s a true plug-and-play solution. We flash it with the latest GM software updates using your vehicle’s VIN, so it arrives ready for installation, preserving all your original settings and key information.
A Technician’s Notebook: The Case of the Ghostly Electrical Faults
A local contractor brought in his ’11 Express 3500. The complaint was intermittent no-start and the radio randomly turning off. He’d already replaced the battery and checked the alternator. Diagnostics showed a dozen communication error codes (U-codes) pointing everywhere and nowhere at once. This is a classic sign of a failing BCM. The internal circuits start to break down, sending corrupt data across the CAN bus network. Instead of chasing phantom issues, we identified the BCM as the root cause. A cloned module like this one had him back on the job site the next day, without the vehicle downtime and programming fees of a dealership visit.
Is Your Express Van Showing These Symptoms?
A failing BCM can manifest in numerous ways. Here are some of the most common signs I’ve diagnosed in my shop:
- ✔ Erratic power windows, door locks, or interior/exterior lights.
- ✔ The security or anti-theft light stays on, causing a no-start condition.
- ✔ Horn sounding unexpectedly or not working at all.
- ✔ Dashboard warning lights (like ABS or Airbag) illuminating for no reason.
- ✔ Communication failure diagnostic trouble codes (DTCs), such as U0100, U0140, or other U-series codes.
- ✔ Rapid battery drain while the vehicle is parked.
A Straightforward Guide to BCM Installation
Replacing the BCM in the Express van is manageable for a DIYer with basic tools. The module is typically located behind the center dash panel.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Access the Module: Carefully remove the dash trim panels required to access the BCM. On most Express and Savana vans, this is in the center dash area.
- 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.
- Install the New BCM: Mount your pre-programmed replacement module in the same location and securely reconnect all electrical harnesses.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, horn, and wipers—to confirm the repair.
Important Post-Installation Note: In some cases, additional steps may be required. For instance, if the airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. A ‘Brake Pedal Position Relearn’ might also be necessary. Always refer to a service manual for your specific vehicle if you are unsure.
Verified Vehicle Compatibility
This cloning service is for BCMs with part number 15299986 and other interchangeable numbers listed below. It is a direct fit for a wide range of GM vehicles. Please confirm your part number before ordering.
Interchangeable 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
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25892622
CAPRICE 11-13 Body Control (BCM)
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921435, 20921436, 22860591
CTS 08 Body Control (BCM); RH dash
CTS 08-13 Body Control (BCM); LH dash
DTS 06-11 Body Control (BCM); (RH center dash)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
EQUINOX 07-09 Body Control (BCM); (center dash)
ESCALADE 10 Body Control (BCM); (under steering column), ID 20815898, 25892622
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 20815898, 25892622
ESCALADE EXT 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS 1500 VAN 08-12 Body Control (BCM); (center dash)
EXPRESS 2500 VAN 08-09 Body Control (BCM); (center dash)
EXPRESS 2500 VAN 10 Body Control (BCM); (center dash), 4.8L, 6.0L, 6.6L (VIN 6, LMM)
EXPRESS 2500 VAN 11-12 Body Control (BCM)
EXPRESS 3500 VAN 08-09 Body Control (BCM); (center dash)
EXPRESS 3500 VAN 10 Body Control (BCM); (center dash), 4.8L, 6.0L, 6.6L (VIN 6, LMM)
EXPRESS 3500 VAN 11-12 Body Control (BCM)
G8 08-09 Body Control (BCM); (center dash)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
IMPALA 06-12 Body Control (BCM); (LH dash)
IMPALA 13 Body Control (BCM); (LH dash), ID 22820315
LUCERNE 06-11 Body Control (BCM); (right side dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SAVANA 1500 VAN 08-12 Body Control (BCM); (center dash)
SAVANA 2500 VAN 08-09 Body Control (BCM); (center dash)
SAVANA 2500 VAN 10 Body Control (BCM); (center dash), 4.8L, 6.0L, 6.6L (VIN 6, LMM)
SAVANA 2500 VAN 11-12 Body Control (BCM); (center dash)
SAVANA 3500 VAN 08-09 Body Control (BCM); (center dash)
SAVANA 3500 VAN 10 Body Control (BCM); (center dash), 4.8L, 6.0L, 6.6L (VIN 6, LMM)
SAVANA 3500 VAN 11-12 Body Control (BCM)
SRX 07-09 Body Control (BCM); LH dash
STS 10 Body Control (BCM); center dash
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 20815898, 25892622
TAHOE 10 Body Control (BCM); (under steering column), ID 20815898, 25892622
TORRENT 07-09 Body Control (BCM); (center dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
VUE 08-10 Body Control (BCM); (center dash)
YUKON 10 Body Control (BCM); (under steering column), ID 20815898, 25892622
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 20815898, 25892622
Frequently Asked Questions
How does the cloning service work?
After you purchase, you will send us your original BCM. We then use specialized equipment to extract the vehicle-specific data and transfer it to the replacement module. This makes the replacement module plug-and-play, with no additional programming needed.
Why do you need my VIN?
We use your Vehicle Identification Number (VIN) to access the latest software and calibration files directly from GM. This ensures your replacement BCM is loaded with the most current, stable software for optimal performance.
Will I get my old BCM back?
Yes, absolutely. Your original module is always returned to you along with the programmed replacement unit. We do not keep your old part.
Is this a difficult part for a DIYer to install?
For someone with basic mechanical skills, it’s a very manageable job. The main challenge is accessing the module, which is usually behind the center dash. Since our module is pre-programmed, you eliminate the most complex part of the job.
What tools are needed for the post-installation procedures?
Procedures like the Airbag System Sync or Brake Pedal Position Relearn must be done with a professional-grade bidirectional scan tool (like a Tech2, Snap-on, or Autel). Basic code readers cannot perform these functions. These procedures are only needed if specific warning lights appear after installation.