Restore Your Cadillac’s Electrical System with a Reliable, Programmed BCM
If you’re dealing with bizarre electrical issues in your 2010 Cadillac STS—like flickering lights, power windows with a mind of their own, or random warning messages on your dash—you’re likely facing a failing Body Control Module (BCM). As a technician with over 20 years of experience, I’ve seen how a faulty BCM can turn a luxury vehicle into a source of daily frustration. The BCM is the central nervous system for your car’s body electronics, managing everything from the interior lights and power locks to the security system. When it fails, chaos ensues.
This isn’t just another part. This is a complete, ready-to-install solution. We take a genuine OEM-spec Body Control Module and program it with the latest GM software updates specifically for your vehicle’s VIN. This critical step ensures that the module communicates perfectly with your car’s other systems right out of the box, eliminating the need for an expensive trip to the dealership for programming. You get a reliable fix that restores your vehicle’s functionality and your peace of mind.
A Technician’s Notebook: The Case of the Phantom Drain
A customer brought in their Cadillac complaining of a dead battery every morning. They’d already replaced the battery and alternator. After checking for parasitic draws, I traced the issue to the BCM. It wasn’t fully ‘going to sleep’ when the car was off, causing a slow drain that killed the battery overnight. A simple BCM replacement, like this programmed unit, solved a problem that had cost the owner hundreds in incorrect repairs. It’s a classic example of how the 2010 STS Body Control Module is central to proper vehicle operation, even when it’s parked.
Is Your Vehicle Showing These Signs of BCM Failure?
A failing BCM can cause a wide range of symptoms that often seem unrelated. If you’re experiencing any of the following, your BCM is the likely culprit:
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights).
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ The security system acting up, such as the alarm randomly going off.
- ✔ Instrument cluster gauges behaving strangely or warning lights staying on.
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module).
- ✔ A persistent battery drain that occurs even when the vehicle is off.
A Straightforward Guide to Your BCM Installation
Installing your new 2010 STS Body Control Module is a manageable job for a DIY enthusiast with basic tools. The BCM in the 2010 STS is typically located in the center dash area. Always consult a service manual for the exact location and torque specs.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Access the Module: Carefully remove the necessary dash panels or trim to gain access to the old BCM. The location is noted as ‘center dash’ for your STS.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in place and securely tighten the bolts. Reconnect all electrical connectors, ensuring they click into place.
- Final Steps & Relearns: Reassemble your dash panels and reconnect the battery. Start the vehicle. Note that some post-installation procedures, like an Airbag System Sync or Brake Pedal Position Relearn, may be required. See our FAQ for details.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM vehicles and part numbers. Please verify your part number or contact us with your VIN to confirm compatibility. 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.
Fits models including, but not limited to:
- Cadillac STS (2010)
- Cadillac DTS (2006-2011)
- Cadillac CTS (2008-2013)
- Chevy Impala (2006-2013)
- Chevy Equinox (2007-2009)
- Chevy Tahoe (2010)
- GMC Acadia (2007-2012)
- GMC Yukon (2010)
- Chevy & GMC Vans (Express/Savana, various years)
- And many more. Please check the full list provided.
Frequently Asked Questions
Why do you need my VIN to program the BCM?
Your Vehicle Identification Number (VIN) allows us to access the specific software and calibrations for your car’s exact configuration, including options like sunroof, specific lighting, and security features. Programming the 2010 STS Body Control Module to your VIN ensures it works seamlessly with your vehicle’s other electronic modules right out of the box.
Is this a difficult part to install myself?
For someone with basic mechanical skills, this is a very manageable job. The main challenge is typically accessing the module’s location within the dash. No special programming tools are required on your end since we handle all the programming before shipment.
What if my airbag light is on after installation?
In some cases, the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). If the airbag light appears, a procedure called ‘Setup SDM Primary Key in BCM’ will need to be performed by a shop with a professional-grade scan tool. This syncs the two modules and resolves the light.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your original module, which can be helpful for future reference if needed.
What is the Brake Pedal Position Relearn?
The BCM interacts with the brake system for features like traction control and cruise control. A Brake Pedal Position Relearn is a simple calibration procedure that ensures the new BCM knows the exact position of your brake pedal. This may be required on some models to ensure all related functions work correctly.