Is Your Cadillac Acting Possessed? It’s Probably the BCM.
If you’re dealing with a frustrating mix of electrical gremlins in your 2010 Cadillac STSโlike power windows with a mind of their own, flickering interior lights, a security system that won’t disarm, or a battery that’s constantly deadโyou’re not alone. In my 20+ years as a diagnostician, I’ve seen these exact symptoms hundreds of times. More often than not, the culprit is a failing Body Control Module (BCM), the central nervous system for your car’s body electronics.
From the Shop Floor: A Real-World Diagnosis
A customer’s 2010 Cadillac STS came in last week with the classic signs of a failing BCM: intermittent electrical issues that defied logic. The radio would turn on by itself, and the security light would stay on, draining the battery overnight. After confirming the battery and alternator were healthy and all grounds were clean and tight, we pinpointed the BCM. This is a common failure point I’ve diagnosed countless times, often due to internal circuit board corrosion from moisture or simple component fatigue over the years.
The Direct Solution: A VIN-Programmed BCM
Don’t waste time and money at the dealership. This BCM is the straightforward, reliable solution to restore your vehicle’s functionality. We take the guesswork out of the repair by programming this module specifically for your vehicle using your VIN. This ensures all your car’s original options and security information are correctly loaded, making the installation process as simple as possible.
Symptoms of a Failing 2010 STS Body Control Module:
- โ Erratic or non-functional power windows, locks, and mirrors.
- โ Interior or exterior lights staying on or not working at all.
- โ The security system acting up, preventing the car from starting.
- โ Unexplained battery drain, leaving you stranded.
- โ Communication error codes with other vehicle modules (U-codes).
- โ Wipers or horn activating randomly.
Simple Installation: Get Back on the Road Fast
This module is designed for a direct-fit replacement. Since we handle the programming, you won’t need a trip to the dealer for expensive software flashing.
- Safety First: Always disconnect the negative battery terminal before starting any electrical work.
- Locate the BCM: On the 2010 Cadillac STS, the Body Control Module is typically located in the center dash area. You may need to remove a trim panel for access.
- Swap the Module: Carefully disconnect the electrical connectors from the old BCM. Remove the mounting bolts or clips and take out the old unit.
- Install the New BCM: Mount your new, pre-programmed BCM in place and securely reconnect all electrical connectors.
- Reconnect Power: Reattach the negative battery terminal.
CRITICAL Post-Installation Steps
After installing your new BCM, a couple of final procedures are necessary to ensure all systems communicate correctly. This is not a defect, but a required security and safety handshake between modules.
- Airbag System (SRS): You must perform the “Setup SDM Primary Key in BCM” procedure using a professional-grade scan tool. This step is essential to clear the airbag warning light and ensure the safety system is fully operational.
- Brake System: Some vehicles may require a Brake Pedal Position Sensor recalibration. This ensures the brake lights and stability control systems function correctly with the new BCM.
Note: If you are not comfortable with these procedures, we strongly recommend seeking assistance from a qualified technician.
Guaranteed Compatibility
This module is a direct replacement for part number 15276271 and a wide range of other GM part numbers. We guarantee compatibility with the following vehicles (and many more):
This BCM is a direct replacement for 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: Cadillac STS, DTS, CTS, SRX, Escalade; Chevrolet Equinox, Impala, Tahoe, Suburban, Traverse, Express Van; GMC Acadia, Yukon, Savana Van; Buick Enclave, Lucerne; Pontiac G8, Torrent; Saturn Outlook, Vue; and Hummer H2. Please verify your part number to ensure a perfect match.