Is Your Cadillac Plagued by Electrical Gremlins?
As a technician with over two decades of diagnostic experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a luxury vehicle like your 2010 Cadillac STS into a source of constant frustration. The BCM is the central command center for your car’s body electronics—from the power windows and locks to the interior lighting and security system. When it starts to fail, it can create a cascade of bizarre, seemingly unrelated problems that are a nightmare to diagnose. This isn’t just an inconvenience; a faulty BCM can affect vehicle security and even prevent it from starting.
This replacement 2010 STS Body Control Module is the definitive solution to restore your vehicle’s proper function. The real advantage here is our included Cloning Service. Instead of buying a blank module and paying hundreds at a dealership for programming, you send us your original BCM. We expertly transfer all the critical vehicle-specific data—like key information and security settings—to this replacement unit. The result? A module that is 100% plug-and-play, arriving at your door ready for installation. It’s the most efficient and cost-effective way to get your Cadillac back to perfect working order.
A Technician’s Notebook: The DTS with a Mind of Its Own
I remember a 2008 Cadillac DTS that came into the shop with a list of complaints that seemed almost random. The radio would shut off, the dome lights would flicker, the security light was on, and occasionally, the car wouldn’t recognize the key fob. The owner had already replaced the battery and checked the fuses. After connecting my scan tool, I found a slew of communication error codes (U-codes) pointing to a network issue. Experience told me to look at the network’s hub: the BCM. A quick voltage check at the BCM connectors confirmed it was receiving power but wasn’t communicating properly. By providing a cloned BCM, we had the car fixed in an afternoon, saving the customer a trip to the dealer and nearly a thousand dollars. This is the exact type of straightforward fix our service provides.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a faulty BCM is the likely culprit. Don’t let these issues go unchecked.
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security system acting up, or the vehicle failing to start.
- ✔ The horn honking randomly or not working when pressed.
- ✔ Dashboard warning lights (like Airbag or ABS) illuminating without a clear cause.
- ✔ Communication error codes, such as U0140, U0155, or other U-codes, stored in the system.
Your Straightforward Guide to Installation
Installing your pre-programmed BCM is a job most DIY enthusiasts can handle. For the 2010 STS, the BCM is typically located in the center dash area.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to discharge completely.
- Locate the Module: You will need to 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 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 new, pre-programmed BCM in the same location and securely plug in all electrical connectors. You should hear a click as they lock 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, etc.—to confirm the repair was successful.
Important Post-Installation Information
Our cloning service handles the majority of the setup, but some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- Airbag System Sync: In some cases, the airbag warning light may illuminate after installation. This is a security measure. A professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and clear the light.
- Brake Pedal Position Relearn: To ensure accurate brake light and traction control operation, a brake pedal position sensor relearn procedure might be necessary. This can often be done with a high-end scan tool.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide range of General Motors vehicles. Please verify your part number from the list below or confirm your vehicle is listed. This unit is compatible with 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, and 95151084.
Fits models including: Acadia (07-12), Avalanche 1500 (10), Caprice (11-13), Captiva Sport (12), CTS (08-13), DTS (06-11), Enclave (08-12), Equinox (07-09), Escalade (10), Express/Savana Vans (08-12), G8 (08-09), Hummer H2 (08-09), Impala (06-13), Lucerne (06-11), Monte Carlo (06-07), Outlook (07-10), SRX (07-09), STS (10), Suburban 1500 (10), Tahoe (10), Torrent (07-09), Traverse (09-12), Vue (08-10), Yukon (10), and more. Please check the detailed fitment list to confirm.
How does the Cloning Service work?
How does the Cloning Service work?
After your purchase, you’ll ship your original BCM to us. Our technicians will extract the unique, vehicle-specific data from your module and transfer it to the replacement unit. This makes the new part recognize your vehicle’s keys and options, eliminating the need for expensive dealer programming. We then ship both your original module and the ready-to-install replacement back to you.
Why do you need my VIN?
We require your Vehicle Identification Number (VIN) to load the latest, most stable factory software from GM for your specific vehicle build. This ensures the BCM operates with the newest updates for optimal performance and reliability, which is done before the cloning process.
Do I need to return my old BCM?
Yes, the cloning process requires your original module to transfer the data. However, there is no core charge. We always return your original module along with the newly programmed replacement unit.
Is this part difficult to install?
The physical replacement is generally straightforward for someone with basic mechanical skills. It involves removing some dash trim, unplugging the old module, and plugging in the new one. Since our service makes it plug-and-play, you avoid the most complex part of the job: the software programming.
What tools are required for the post-installation procedures?
If a post-install procedure like the Airbag System Sync or Brake Pedal Position Relearn is needed, it requires a professional-grade bidirectional scan tool. Most basic code readers cannot perform these functions. If you don’t have access to one, a local independent mechanic can typically perform these relearns for you.