Restore Your Cadillac’s Brain and Banish Electrical Gremlins
Are you chasing frustrating electrical issues in your 2010 Cadillac STS? Flickering lights, a security system that has a mind of its own, or power accessories that work one minute and not the next are classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s comfort and convenience features, a faulty BCM can make driving a nightmare. In my 20+ years as a technician, I’ve seen how a failing BCM can mimic a dozen other problems, leading to wasted time and money on incorrect diagnoses. This isn’t just a component; it’s the nerve center of your car’s body electronics.
We offer a straightforward, reliable solution. This is a direct-replacement BCM for your vehicle, and the best part is our included Cloning Service. You send us your original BCM, and we professionally transfer all its vital data—including key information, mileage, and vehicle-specific options—to this replacement unit. This means when you receive it back, it’s a true plug-and-play fix. You avoid the exorbitant costs and scheduling headaches of dealership programming, getting your luxury sedan back to perfect working order quickly and efficiently.
Case Study: The Ghost in the Cadillac
A customer brought in a 2010 STS with a laundry list of bizarre symptoms: the radio would shut off randomly, the driver’s side window wouldn’t respond, and occasionally, the car wouldn’t recognize the key fob. They’d already replaced the battery and checked fuses. After confirming solid power and ground to the BCM, we noticed communication dropouts on our diagnostic scanner. This intermittent behavior is a hallmark of internal BCM failure. By performing our cloning service on a replacement module, we transferred all the original data. The installation was simple, and every single electrical gremlin was gone. The customer was thrilled to have their car back without a multi-day stay at the dealership.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a failing BCM could be the culprit. A professional diagnosis is always recommended, but these are strong indicators:
- ✔ Intermittent or non-functional power windows, locks, or mirrors.
- ✔ Erratic interior or exterior lighting (flickering, staying on, or not turning on).
- ✔ Security system warning lights or alarm randomly activating.
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module).
- ✔ Key fob not being recognized or intermittent remote start issues.
- ✔ Dashboard warning lights illuminating without a clear cause.
A Straightforward Guide to Installation
Installing your cloned 2010 STS Body Control Module is designed to be as simple as possible. While locations vary, the BCM in the STS is typically found in the center dash area.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the Original BCM: Access the BCM, which is located in the center dash. This may require removing some trim panels for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the module. Note their orientation. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount the replacement BCM you received from us and securely reconnect the electrical connectors.
- Reconnect Battery: Reattach the negative battery terminal.
- Test and Verify: Start the vehicle and test all body functions—lights, windows, locks, radio, etc.—to ensure everything is operating correctly. Note the post-installation procedures below, as some relearns may be required.
Important Post-Installation Information
While our cloning service makes this a near plug-and-play repair, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- ✔ Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional-grade scan tool. This syncs the security data between the modules.
- ✔ Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light and stability control operation.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility
This BCM, part number 15921353, is compatible with a wide range of GM vehicles. It is a direct replacement for numerous part numbers, ensuring broad applicability. Please verify your vehicle is on this list:
STS (2010), DTS (2006-11), CTS (2008-13), SRX (2007-09), Escalade / ESV / EXT (2010)
Chevrolet:
Equinox (2007-09), Impala (2006-13), Monte Carlo (2006-07), Tahoe (2010), Traverse (2009-12), Suburban 1500 (2010), Avalanche 1500 (2010), Captiva Sport (2012), Caprice (2011-13), Express 1500/2500/3500 Vans (2008-12)
GMC:
Acadia (2007-12), Yukon / Yukon XL 1500 (2010), Savana 1500/2500/3500 Vans (2008-12)
Buick:
Enclave (2008-12), Lucerne (2006-11)
Other GM:
Hummer H2 (2008-09), Pontiac G8 (2008-09), Pontiac Torrent (2007-09), Saturn Outlook (2007-10), Saturn VUE (2008-10)
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
What exactly is the Cloning Service?
Our Cloning Service is a process where we transfer the complete software and vehicle-specific data (like VIN, mileage, and key information) from your original BCM to the replacement unit. This ensures seamless integration without the need for dealer programming.
Do I need to send my original BCM to you?
Yes. For the cloning process to work, we need your original module. After you place your order, we will provide instructions for shipping it to us. We will return your original module along with the newly programmed replacement.
Will I need any special tools for installation?
For the physical installation, you’ll likely only need basic hand tools like a socket set and trim removal tools. However, as noted, some vehicles may require a professional scan tool for post-installation procedures like an airbag system sync or brake pedal relearn.
Is this a reliable, long-term fix for my 2010 STS Body Control Module?
Absolutely. We provide high-quality, tested modules that are programmed with the latest GM software updates available for your VIN. This service is designed to be a durable and dependable solution to your vehicle’s electronic issues.
What happens if I still have an airbag light after installation?
This is a known possibility. It means the new BCM needs to be electronically introduced to the airbag’s computer (SDM). A repair shop with a professional-grade diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.