Restore Full Electrical Control to Your GM Truck or SUV
If you’re dealing with bizarre 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 won’t cooperate—you’ve likely pinpointed the culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty BCM can turn a luxury vehicle into a source of constant frustration. It’s the central command center for your vehicle’s body electronics, and when it fails, chaos ensues.
This isn’t just an inconvenience; it can be a safety issue. A malfunctioning BCM can affect your vehicle’s lighting, anti-theft system, and even communication with other critical modules. The dealership solution often involves multiple appointments, high diagnostic fees, and a hefty bill for programming a new module. We eliminate that hassle. This replacement Body Control Module, part number 25826124, arrives at your door fully programmed with the latest GM software, tailored specifically to your vehicle’s VIN. You get a reliable, cost-effective solution without ever stepping foot in a service bay.
A Technician’s Notebook: The Phantom Drain
I remember a 2010 Yukon Denali (which uses this exact BCM platform) that came into my shop with a persistent battery drain. The owner had replaced the battery twice and the alternator once, but the vehicle would still be dead after sitting for a day. After hooking up my multimeter and pulling fuses, I traced the parasitic draw to the BCM circuit. The module wasn’t properly entering its ‘sleep’ mode, causing a constant drain. A new, correctly programmed BCM like this one solved the problem instantly, saving the customer from throwing more parts at a misdiagnosed issue.
Common Signs of a Failing BCM
A faulty BCM can manifest in numerous ways. If your vehicle is showing any of these symptoms, a failing 2010 Escalade EXT BCM could be the cause. Proper diagnosis is always recommended, but here are the most common indicators I’ve seen in my shop:
- ✔ Erratic or non-functional power windows and door locks.
- ✔ Interior dome lights or dashboard lights staying on or not working at all.
- ✔ The security system engaging randomly or preventing the vehicle from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Remote keyless entry failure.
- ✔ False warnings on the driver information center (e.g., “Service Theft System”).
- ✔ Communication error codes, often in the U-series (like U0140, U0155), indicating loss of communication with the BCM.
A Straightforward Guide to BCM Installation
With the programming already handled by our experts, the physical installation is very manageable for a DIYer with basic tools. On the 2010 Escalade EXT, the BCM is typically located under the driver’s side of the dashboard, near the steering column.
- 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 Module: Remove any necessary lower dash panels to gain access to the BCM. 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 release tabs that need to be pressed. 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 plug in all the wiring harnesses. 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 (without starting the engine) and test the functions: power windows, locks, lights, etc.
- Perform Relearn Procedures: Depending on your vehicle, you may need to perform additional steps. For instance, if the airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. A Brake Pedal Position Relearn might also be required for proper brake light and traction control operation.
Disclaimer: This is a general guide. Always consult a factory service manual for instructions specific to your vehicle’s year and model.
Will This Fit My Vehicle?
This Body Control Module is a direct replacement for a wide range of General Motors vehicles. While this listing is focused on the 2010 Escalade EXT BCM, it is guaranteed to fit and function correctly in the following models, provided the part number matches. This unit replaces many part numbers, including: 15819552, 15921352, 20815898, 20935349, 22860591, 25892622, 25910474, and many more.
A partial list of compatible vehicles includes:
- Cadillac Escalade, ESV, EXT (2010)
- Cadillac CTS (2008-2013), DTS (2006-2011), SRX (2007-2009)
- Chevrolet Avalanche 1500 (2010)
- Chevrolet Tahoe & Suburban 1500 (2010)
- Chevrolet Equinox (2007-2009) & Traverse (2009-2012)
- Chevrolet Impala (2006-2013) & Monte Carlo (2006-2007)
- Chevrolet Express / GMC Savana Vans (2008-2012)
- GMC Acadia (2007-2012)
- GMC Yukon & Yukon XL 1500 (2010)
- Buick Enclave (2008-2012) & Lucerne (2006-2011)
- Hummer H2 (2008-2009)
Frequently Asked Questions
Do I need to program this BCM?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you a trip to the dealership.
What does ‘No Core Charge’ mean?
It means you do not have to send your old, faulty BCM back to us. You can keep it or dispose of it yourself, simplifying the process for you.
Where is the BCM located on my 2010 Escalade EXT?
On the 2010 Escalade EXT, the BCM is typically found under the driver’s side dashboard, attached near the steering column.
Will this fix my car’s starting problems?
If the starting problem is caused by the anti-theft system being controlled by a faulty BCM, then yes, this part will resolve it. However, starting issues can have many causes, so proper diagnosis is essential.
What if my airbag light comes on after installation?
This can happen occasionally. It requires a professional-level scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the airbag system with the new BCM and turn off the light.
Is this part difficult to install for a DIYer?
The physical swap is straightforward for someone with basic mechanical skills. The most complex part—the programming—is already done for you. The main challenge is accessing the module’s location under the dash.