Restore Your Cadillac’s Electrical Systems with a Plug-and-Play BCM

If you’re dealing with bizarre and frustrating electrical issues in your 2010 Cadillac STS, you’re not alone. Flickering lights, malfunctioning power windows, a temperamental security system, or even a car that refuses to start can often be traced back to a single component: a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, when the BCM goes down, it can feel like your car has a mind of its own. This isn’t just an inconvenience; it can be a major disruption to your daily life.

This is a direct-fit replacement Body Control Module, part number 25847588, that arrives at your door fully programmed to your vehicle’s specific VIN. We handle the complex part—flashing the unit with the latest official GM software—so you don’t have to. This means no expensive trips to the dealership for programming and no need for specialized scan tools. It’s the most efficient and reliable way to get your car back to 100% functionality.

Common Signs of a Failing BCM

A faulty BCM can manifest in numerous ways. If your vehicle is experiencing any of the following, a failing module is the likely culprit. Keep an eye out for diagnostic trouble codes (DTCs) related to communication, such as U0140, U0155, or other U-codes.

• ✔ Intermittent or non-working power windows, door locks, or mirrors.
• ✔ Erratic instrument cluster behavior, with gauges dropping out or warning lights flashing.
• ✔ Vehicle security system faults or the engine failing to start due to anti-theft issues.
• ✔ Interior or exterior lights not working correctly (staying on or not turning on).
• ✔ Malfunctioning heating and A/C controls.
• ✔ Key fob not being recognized by the vehicle.

Your Straightforward Installation Guide

Installing your new 2010 STS Body Control Module is a manageable job for a confident DIYer. The BCM on the 2010 STS is typically located in the center dash area. Always confirm the location in a service manual for your specific vehicle.

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: Carefully remove the necessary dash panels or trim to gain access to the old BCM. This may involve removing the glove box or lower dash sections.
3. Disconnect and Remove: Unplug all electrical connectors from the old BCM. They have locking tabs, so be gentle. Once disconnected, unbolt or unclip the module from its mounting bracket.
4. Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses. Ensure they click into place.
5. Reassemble and Reconnect: Reinstall the dash panels and trim you removed. Finally, reconnect the negative battery terminal.
6. Perform Relearns (If Needed): Start the vehicle. Check for any warning lights. As noted below, an airbag or brake pedal position relearn may be required.

Important Post-Installation Information

While this module is programmed to be plug-and-play, some vehicle systems may require a final handshake to recognize the new BCM. This is a normal part of the process.

• Airbag System Sync: If the airbag light is on after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible high-end scan tool. This syncs the new BCM with the airbag module.
• Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be necessary to ensure the brake lights and traction control system function as expected.
• No Core Charge: We do not require you to send your old part back. There is no core charge associated with this purchase.

Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified mechanic if you are unsure about any step.

Verified Vehicle Compatibility

This Body Control Module is a direct replacement for part number 25847588 and is interchangeable with a wide range of other part numbers. It is guaranteed to fit the following makes and models, but please verify your part number or contact us with your VIN to ensure perfect compatibility.