End Frustrating Electrical Problems in Your GM Vehicle
Are you dealing with bizarre electrical issues in your 2010 Cadillac STS? Flickering interior lights, power windows with a mind of their own, or a security system that randomly prevents your car from starting? These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can wreak havoc, making your car feel unreliable and unsafe. This is a problem I’ve seen countless times in my 20+ years of diagnostics. Drivers come in frustrated after replacing batteries and alternators, only to find the root cause was the BCM all along.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the biggest headache out of the repair process: programming. Simply provide your vehicle’s VIN at checkout, and our experts will flash this module with the latest GM software specific to your car. This means you can skip the expensive trip to the dealership and the need for specialized scan tools. You get a fully functional 2010 STS Body Control Module that restores functionality right out of the box.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2010 Cadillac STS that came into the shop with a laundry list of intermittent complaints. The radio would shut off, the dash lights would flicker, and occasionally, the car wouldn’t recognize the key fob. The owner was convinced the car was haunted. We checked the battery, grounds, and alternator—all perfect. A deep scan revealed multiple U-codes (communication errors) pointing to the BCM. After swapping in a pre-programmed module like this one, every single ghost in the machine vanished. It’s a textbook example of how a failing 2010 STS Body Control Module can cause widespread, confusing symptoms.
Common Signs of a Failing BCM
If your vehicle is experiencing any of the following, a faulty BCM is the likely culprit. This module is a direct replacement for part number 15921353 and many others, designed to resolve these specific issues.
- ✔ Erratic or non-functional power windows, door locks, and interior/exterior lights.
- ✔ Horn sounding randomly or not working at all.
- ✔ Vehicle security system faults or anti-theft light staying on.
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0140, U0155, or other U-codes.
- ✔ Wipers activating on their own or not responding to the switch.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a confident DIYer. For the 2010 Cadillac STS, the BCM is typically located in the center dash area. Always confirm the location for your specific vehicle.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to fully discharge.
- Access the Module: Carefully remove the necessary dash trim panels to gain access to the BCM. On the STS, this is usually behind or near the glove box or center console area.
- Disconnect and Remove: 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 reconnect 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—lights, locks, windows, wipers, etc.—to ensure proper operation.
Important Post-Installation Steps
While our programming handles the heavy lifting, some vehicle systems may require a simple relearn procedure to sync with the new BCM. This is a normal part of the process.
- Airbag System Sync: If the airbag (SRS) warning 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: On some models, a brake pedal position sensor recalibration may be necessary to ensure brake lights and traction control function correctly.
- No Core Charge: You are not required to send your old part back. There is no core charge associated with this purchase.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any part of the installation.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide range of General Motors vehicles. It is compatible with the original part number 15921353 and all the interchangeable numbers listed below. Please verify your vehicle is on this list to ensure proper fitment.
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25892622
CAPRICE 11-13 Body Control (BCM)
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921435, 20921436, 22860591
CTS 08-13 Body Control (BCM); LH dash
DTS 06-11 Body Control (BCM); (RH center dash)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
EQUINOX 07-09 Body Control (BCM); (center dash)
ESCALADE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
ESCALADE EXT 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS/SAVANA VANS 08-12 Body Control (BCM)
G8 08-09 Body Control (BCM); (center dash)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
IMPALA 06-13 Body Control (BCM); (LH dash)
LUCERNE 06-11 Body Control (BCM); (right side dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SRX 07-09 Body Control (BCM); LH dash
STS 10 Body Control (BCM); center dash
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TAHOE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TORRENT 07-09 Body Control (BCM); (center dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
VUE 08-10 Body Control (BCM); (center dash)
YUKON 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming myself?
No. This 2010 STS Body Control Module arrives at your door fully programmed to your vehicle’s specific VIN. It is ready for installation right out of the box, saving you a trip to the dealer.
Where do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a plate on the driver’s side of the dashboard, visible through the windshield.
What if the airbag light comes on after I install it?
This is a normal possibility. The new BCM needs to be electronically introduced to the airbag system. This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be performed by any professional mechanic with a capable bi-directional scan tool.
Is there a core charge for this part?
No, there is absolutely no core charge. You can keep your old module without any extra fees or hassle.
Will this fix my car’s starting problem?
If your starting problem is related to the anti-theft or security system controlled by the BCM, then yes, this part is designed to solve that issue. A BCM failure is a common cause of no-start conditions in these vehicles.
What if I order the wrong part?
We strongly encourage you to verify fitment using the compatibility list and your original part number. Providing your VIN for programming is the best way to guarantee you receive the correct, compatible module for your vehicle.