Restore Your Vehicle’s Electrical System with a Plug-and-Play Solution
Are you dealing with frustrating and unpredictable electrical problems in your Cadillac STS? Flickering lights, malfunctioning power windows, a security system that acts up, or even a vehicle that refuses to start can all point to a single, critical component: a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, a faulty BCM can wreak havoc. This isn’t just an inconvenience; it can be a safety issue when essential functions like lighting and security are compromised.
This is a direct-fit replacement Body Control Module, part number 15276271, for a wide range of GM vehicles. The best part? We take the guesswork and dealer expense out of the equation. Simply provide your vehicle’s VIN at checkout, and our technicians will program the module with the latest GM software specifically for your car. It arrives at your door ready for installation, saving you hundreds in dealership programming fees and getting you back on the road faster.
From the Diagnostic Bay: The Case of the Haunted Cadillac
I once had a 2010 Cadillac STS roll into my shop with a list of complaints that sounded like a ghost was in the machine. The radio would change stations on its own, the interior lights would pulse randomly, and the anti-theft light would stay on, sometimes preventing the car from starting. The owner had already replaced the battery and checked fuses, but the problems persisted. A quick scan with a professional tool revealed a dozen communication error codes (U-codes), all pointing back to one source. The BCM was failing internally, sending erratic signals across the vehicle’s network. Installing a VIN-programmed 2010 STS Body Control Module like this one resolved every single issue in under an hour. It’s a classic failure mode I’ve seen hundreds of times on these GM platforms.
Common Signs of a Failing BCM
If your vehicle is exhibiting any of these symptoms, a failing BCM is the likely culprit. A failing module can often set communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or other U-codes indicating a loss of communication with other modules.
- ✔ Power windows, locks, or mirrors operate intermittently or not at all.
- ✔ Interior or exterior lights flicker, stay on, or won’t turn on.
- ✔ The security system or keyless entry malfunctions.
- ✔ The instrument cluster displays erratic warnings or incorrect information.
- ✔ The vehicle experiences a parasitic battery drain, leading to a dead battery.
- ✔ A no-start condition where the engine cranks but won’t fire up due to a security system fault.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a confident DIYer. While the exact location varies by model (see fitment list), the general process is similar. For your 2010 STS Body Control Module, it is typically located in the center dash area.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On the STS, you’ll generally find the BCM behind a panel in the center dash. You may need to remove trim panels to gain access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount the new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Relearns (If Needed): Start the vehicle. If you see an airbag warning light or experience issues with brake lights, you may need to perform the post-installation procedures noted below with a capable scan tool.
Important Post-Installation Notes
While this module is programmed to your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. This may include:
- Airbag System Sync: If the airbag light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required using a professional diagnostic tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary for proper brake light and traction control operation.
Disclaimer: Always consult a factory service manual for your specific vehicle for detailed instructions and torque specs.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide array of GM vehicles and interchanges with numerous part numbers. Please confirm your vehicle is on this list. 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.
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 1500 VAN 08-12
EXPRESS 2500 VAN 08-12
EXPRESS 3500 VAN 08-12
G8 08-09
HUMMER H2 08-09
IMPALA 06-13
LUCERNE 06-11
MONTE CARLO 06-07
OUTLOOK 07-10
SAVANA 1500 VAN 08-12
SAVANA 2500 VAN 08-12
SAVANA 3500 VAN 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
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this module. You can keep your original part.
What information do you need to program the module?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). We use this to load the correct, vehicle-specific software and calibrations from GM.
Is this a difficult part to install myself?
For someone with basic mechanical skills and tools, this is a very manageable repair. The primary challenge is accessing the module, which is often behind dash panels. The installation itself is a simple plug-and-play process since we handle the programming.
Will this fix my ‘Service Theft System’ message?
In many cases, yes. The BCM is a key part of the vehicle’s anti-theft and immobilizer system. A failing BCM is a very common cause of this warning message and related no-start issues.
What if my part number is not listed but my car is?
The part numbers listed are the most common ones this module replaces. If your vehicle model and year are listed in our compatibility chart, this module will work for you, as GM often supersedes part numbers over time.