If you’re dealing with perplexing electrical issues in your 2010 Cadillac Escalade EXT—like power windows with a mind of their own, flickering interior lights, or a security system that prevents your truck from starting—you’ve likely pinpointed the culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a luxury vehicle into a source of daily frustration. This isn’t just a component; it’s the central command for your vehicle’s body electronics, and when it fails, chaos ensues.
We offer a straightforward, reliable solution. This is a direct-replacement Body Control Module, part number 15921353, that arrives at your doorstep pre-programmed to your specific vehicle. Simply provide us with your VIN after purchase, and our experts will flash the module with the latest GM software updates. This critical step ensures seamless integration, restoring all the functions you depend on without the exorbitant cost and hassle of a dealership visit. Get your Escalade EXT back to performing flawlessly.
A Technician’s Notebook: The Escalade with a Mind of Its Own
I remember a 2010 Escalade EXT rolling into my bay last winter. The owner was at his wit’s end. The radio would randomly shut off, the driver’s side power window wouldn’t work, and occasionally, the truck wouldn’t start, flashing a ‘Service Theft System’ message. He’d already replaced the battery and checked fuses. My scan tool pulled several communication error codes (U-codes). After checking the wiring, I focused on the BCM located under the steering column. These units are susceptible to voltage spikes and internal circuit board failure over time. We installed a pre-programmed BCM, and instantly, all the ghost-like electrical problems vanished. It’s a classic failure pattern I’ve seen hundreds of times on this GM platform.
Is Your GM Vehicle Showing These BCM Failure Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution.
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ The security system preventing the engine from starting (Service Theft System light).
- ✔ The radio or infotainment system randomly turning on or off.
- ✔ False warning lights appearing on the instrument cluster.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0140, U0155, or B-series codes for body accessories.
DIY-Friendly Guide: Installing Your New BCM
Replacing the BCM on your 2010 Escalade EXT is a manageable task for a confident DIYer. The module is typically located under the driver’s side dash, near the steering column. Follow these general steps for a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On the Escalade EXT, you’ll need to remove the lower dash panel beneath the steering wheel to access the module. It’s a black plastic box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug all wiring harnesses from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the wiring harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Re-install the dash panel, reconnect the negative battery terminal, and start the vehicle. Test all functions like lights, windows, locks, and radio to confirm proper operation.
Post-Installation Notes: In some cases, additional steps may be needed. If your airbag light is on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. A ‘Brake Pedal Position Relearn’ might also be necessary. Always consult a service manual for model-specific details.
Will This Fit My Vehicle? Confirmed Compatibility
This Body Control Module is a direct replacement for a wide range of GM vehicles. It is compatible with 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, and 95151084. Please verify your vehicle from the list below:
Frequently Asked Questions
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and vehicle-specific options for your 2010 Escalade EXT. This ensures all features work correctly right out of the box, just like a module from the factory.
Is this a plug-and-play part?
Yes, because we program it to your VIN before shipping, it is a plug-and-play installation for most functions. However, as noted, some vehicles may require an additional ‘relearn’ or ‘sync’ procedure for the airbag or brake pedal position sensor, which requires a professional scan tool.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module, which saves you the time and expense of shipping a core back.
What happens if the airbag light comes on after installation?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A qualified technician with a high-level diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Will this fix a ‘Service Theft System’ message?
In many cases, yes. The BCM is a key part of the Passlock/Passkey anti-theft system. A failing BCM is a very common cause of this specific issue on GM vehicles. Our VIN-programming restores this security handshake.