Programmed 2008-2013 CTS BCM 25934763 | Cadillac Body Control Module

Restore Sanity to Your Cadillac’s Electrical System

As a technician with over two decades of experience, I’ve seen it all. A customer brings in their 2008-2013 Cadillac CTS with a list of problems that sounds like the car is possessed: the radio turns on by itself, the power windows have a mind of their own, the security light is flashing, and sometimes, it just refuses to start. These aren’t random, unrelated gremlins; they’re classic symptoms of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it starts to fail, chaos ensues.

Don’t let a faulty module frustrate you or lead to an expensive, unnecessary trip to the dealership. We offer a reliable and straightforward solution: a replacement Body Control Module, part number 25934763, that arrives at your doorstep pre-programmed for your specific vehicle. All we need is your VIN. This eliminates the most difficult part of the repair, allowing you to get your luxury car back to its smooth, predictable self.

Common Signs of a Failing Cadillac BCM

If your vehicle is exhibiting any of the following symptoms, a failing BCM is the likely culprit. A professional scan tool may show communication codes like U0140, U0155, or B1001.

• ✔ Erratic or non-functional power windows, door locks, and interior/exterior lights.
• ✔ Horn honking randomly or not working at all.
• ✔ Security system faults or anti-theft light staying on, preventing the car from starting.
• ✔ Dashboard warning lights illuminating for no reason (ABS, Airbag, Traction Control).
• ✔ Intermittent no-start or no-crank conditions.
• ✔ Wipers activating on their own or not turning off.

Your Straightforward BCM Installation Guide

Replacing the BCM in your CTS is a manageable job for a confident DIYer. The module is typically located on the left (driver’s) side of the dash. While specific steps can vary slightly, here is a general guide.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow capacitors to discharge.
2. Access the Module: You will likely need to remove the lower dash panel or knee bolster under the steering column to gain access to the BCM.
3. Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
4. Install the New BCM: Mount your new, pre-programmed BCM in the same location and reconnect all electrical connectors, ensuring they click securely into place.
5. Reconnect and Test: Reinstall any panels you removed and reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting) and test all body functions: lights, locks, windows, wipers, etc.
6. Post-Installation Checks: Start the vehicle. Note that some additional relearn procedures, such as for the airbag system or brake pedal position sensor, may be required if warning lights appear. This is normal and can often be done with a high-end scan tool.

Will This Fit My Vehicle?

This BCM is a direct replacement for a wide array of General Motors vehicles and is compatible with numerous part numbers. We program it specifically for your vehicle, ensuring proper function. Please verify your vehicle is on the list below. This part replaces the following 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.