Restore Your Cadillac’s Electrical System with a Plug-and-Play Solution
Are you dealing with baffling electrical issues in your 2010 Cadillac STS? Flickering dashboard lights, malfunctioning power windows, or a security system that has a mind of its own are classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. This isn’t just an inconvenience; it can affect your vehicle’s safety and reliability. We offer a dependable, straightforward fix: a replacement BCM, pre-programmed specifically for your vehicle’s VIN.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2010 Cadillac STS that came into my shop with a laundry list of complaints. The owner was at his wit’s end. The radio would turn on and off, the interior lights would stay on, and occasionally, the car wouldn’t start, only to fire up perfectly an hour later. We checked the battery, alternator, and all major ground connections—they were solid. A deep scan revealed multiple communication loss codes (U-codes) pointing to the BCM. After swapping in a VIN-programmed module like this one, every single phantom issue vanished. It’s a prime example of how a single failing module can make a perfectly good car feel unreliable.
Is Your Vehicle Showing These BCM Failure Signs?
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Erratic behavior from interior or exterior lights (staying on, not turning on, or flickering).
- ✔ The security system warning light is illuminated, or the alarm goes off randomly.
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module), are stored in the system.
- ✔ A no-start condition where the starter doesn’t engage, even with a good battery.
- ✔ Dashboard warning lights illuminating for no apparent reason.
This replacement 2010 STS Body Control Module is the definitive solution to these problems. We take the guesswork out of the repair by programming the module with the latest GM software using your vehicle’s VIN. This ensures all factory-calibrated settings for your specific options are loaded and ready to go, eliminating the need for an expensive trip to the dealership for programming.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the BCM: On your 2010 Cadillac STS, the Body Control Module is typically located in the center dash area. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. Note their orientation. Then, unbolt or unclip the module from its mounting bracket and remove it from the vehicle.
- ✔ Install the New Module: Mount the new, pre-programmed BCM in the same location. Reconnect the electrical connectors, ensuring they are seated firmly and click into place.
- ✔ Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- ✔ Perform Final Checks: Start the vehicle and test all related functions: power windows, locks, lights, and radio. Check the dashboard for any warning lights.
Important Post-Installation Steps
While our VIN programming handles the critical setup, some GM vehicles require additional synchronization after a BCM replacement. Please be aware of the following:
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: To ensure correct brake light and traction control operation, a brake pedal position sensor relearn procedure may be required on certain models.
- Disclaimer: Vehicle systems can vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part number 20864767 and is compatible with a wide range of GM cars, trucks, and vans. It replaces the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, and 95151084.
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, ESCALADE ESV 10, ESCALADE EXT 10, EXPRESS VANS 08-12, G8 08-09, HUMMER H2 08-09, IMPALA 06-13, LUCERNE 06-11, MONTE CARLO 06-07, OUTLOOK 07-10, SAVANA VANS 08-12, SRX 07-09, STS 10, SUBURBAN 1500 10, TAHOE 10, TORRENT 07-09, TRAVERSE 09-12, VUE 08-10, YUKON 10, YUKON XL 1500 10.
Please verify the location and ID number as specified in the original product data for your exact vehicle.
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the latest official GM software and load it onto the module. This ensures the BCM is configured for your vehicle’s specific features and options before it even ships.
Is this a difficult part for a DIYer to install?
For someone with basic mechanical skills, the physical replacement is generally straightforward. The BCM is usually located behind a dash panel and held in by a few bolts or clips. The main challenge can be accessing it. Our programming saves you the most complex step, which is the software flashing.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module, which can be helpful for reference or if you ever need to revert to the original state for any reason.
Will this 2010 STS Body Control Module fix my ‘Service Theft System’ light?
A faulty BCM is a very common cause of issues with the GM Pass-Key and other anti-theft systems. While not a guarantee for every case, replacing a failing BCM often resolves these security-related warnings and no-start problems.
What if I still have problems after installation?
First, double-check all connections. Second, consider the potential post-install procedures like the airbag sync or brake pedal relearn, which may require a professional scan tool. If issues persist, the problem may lie in another component, a wiring issue, or a bad ground.