Restore Full Electrical Function to Your Vehicle
Are you tired of dealing with baffling electrical gremlins in your Cadillac STS? Intermittent power windows, flickering dash lights, a security system that acts up, or even a no-start condition can often be traced back to one component: a failing Body Control Module (BCM). Think of the BCM as the central nervous system for your vehicle’s body electronics. When it malfunctions, it can cause a cascade of frustrating and seemingly unrelated issues. In my 20+ years of diagnostics, I’ve seen how a faulty BCM can make a perfectly good car feel unreliable. This isn’t just an inconvenience; it affects your car’s core functions and your peace of mind.
This is a direct-fit replacement 2010 STS Body Control Module, designed to solve these problems for good. We take the guesswork and hassle out of the repair by pre-programming the module to your vehicle’s specific VIN before it ever leaves our facility. This means no expensive trips to the dealership for programming. You get a part that’s ready for installation right out of the box, loaded with the latest GM software updates to ensure optimal performance and longevity.
Case Study: A Tricky Diagnosis
A customer brought in their 2010 Cadillac STS last month with a laundry list of complaints: the radio would randomly turn off, the driver’s side power window worked only when it wanted to, and occasionally, the car wouldn’t recognize the key fob. They had already replaced the battery and checked fuses, but the problems persisted. After connecting my diagnostic tool, I saw several communication error codes pointing towards the BCM. Instead of a complex and costly wiring chase, we started with the most likely culprit. We installed one of our VIN-programmed BCMs, and within an hour, every single one of the customer’s issues was resolved. It’s a perfect example of how this single module can restore order to your vehicle’s complex electronics.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or security system acting up.
- ✔ Warning lights on the dashboard (including Airbag/SRS) with no other apparent cause.
- ✔ Key fob not being recognized or intermittent starting problems.
- ✔ Climate control system behaving unpredictably.
- ✔ Communication errors with other vehicle modules during a diagnostic scan.
A Straightforward Guide to BCM Installation
Replacing the 2010 STS Body Control Module is a manageable job for a confident DIYer or any professional technician. With our pre-programmed unit, you skip the most complicated step.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work. Wait a few minutes for all systems to discharge.
- 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 lower dash panel for 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 your new, VIN-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring they click into place.
- Post-Installation Procedures: Reconnect the battery. This is a critical step: You must perform the ‘Setup SDM Primary Key in BCM’ procedure using a professional-grade scan tool to ensure the airbag system communicates correctly and to clear the warning light. Some vehicles may also require a Brake Pedal Position Sensor recalibration. If you are not equipped to perform these steps, a local repair shop can complete them for you.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 20935349 and is interchangeable with a wide range of other part numbers. It fits numerous GM vehicles. Please verify your part number or contact us with your VIN to confirm fitment.
Compatible 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: 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/ESV/EXT (10), Express/Savana Vans (08-12), G8 (08-09), Hummer H2 (08-09), Impala (06-13), Lucerne (06-11), Monte Carlo (06-07), Outlook (07-10), SRX (07-09), STS (10), Suburban/Tahoe/Yukon (10), Torrent (07-09), Traverse (09-12), Vue (08-10) and more. Please check the detailed fitment list or contact us.
Frequently Asked Questions about the 2010 STS Body Control Module
Do I really need to provide my VIN?
Yes, absolutely. Providing your VIN is essential. We use it to program the BCM with the correct software and vehicle-specific options for your 2010 STS, ensuring it works seamlessly once installed.
What tools are required for the post-installation procedures?
You will need a professional-grade bidirectional scan tool to perform the ‘Setup SDM Primary Key in BCM’ for the airbag system and the Brake Pedal Position Sensor recalibration. Most DIY code readers cannot perform these functions.
Is this a difficult part to replace for a DIYer?
The physical replacement is straightforward for someone with basic mechanical skills. It involves removing a dash panel and swapping the module. The main challenge is having the right scan tool for the post-installation relearn procedures. If you don’t have one, you can install the part yourself and have a local shop complete the final steps.
Will this fix my ‘Service Airbag’ light?
If the BCM is the cause of the airbag light, this will resolve the issue after the ‘Setup SDM Primary Key’ procedure is completed. A faulty BCM often disrupts communication with the airbag module (SDM), triggering the light.
What happens if I install it without doing the relearn procedures?
The vehicle may start and run, but you will have persistent warning lights (like the airbag light) and some systems may not function correctly. Proper safety system operation, particularly the airbags, depends on these procedures being completed correctly.