Programmed 2010 STS Body Control Module BCM 15872421 | VIN Matched

Restore Your GM Vehicle’s Electrical Sanity

Are you chasing down bizarre electrical gremlins in your car, truck, or SUV? One minute the power windows work, the next they don’t. The security light is flashing for no reason, the radio acts possessed, and your dash is lit up with random warnings. Before you start tearing apart wiring harnesses, the culprit is often the Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen hundreds of vehicles with these exact symptoms, and a failing BCM is the root cause more than 90% of the time. It’s the central hub for all your vehicle’s comfort and convenience features, and when it fails, chaos ensues.

This isn’t just a replacement part; it’s a complete, hassle-free solution. We take a genuine GM Body Control Module and flash it with the very latest GM software, specifically programmed to your vehicle’s unique VIN. This means you skip the expensive trip to the dealership for programming. You get a part that’s ready for installation right out of the box, designed to restore function and communicate perfectly with your vehicle’s other systems. This is the professional-grade fix you need to get your vehicle back to 100% functionality.

Common Signs of a Failing GM BCM

If your vehicle is exhibiting any of these behaviors, a faulty BCM is the most likely cause. A replacement 2010 STS Body Control Module or a compatible unit for your GM vehicle will resolve these issues.

• ✔ Erratic or non-functional power windows, door locks, and mirrors.
• ✔ Interior or exterior lights staying on or not turning on at all.
• ✔ The security system acting up, causing no-start conditions or a flashing security light.
• ✔ Horn honking randomly or not working when pressed.
• ✔ Inaccurate or dead gauges on the instrument cluster.
• ✔ Problems with the HVAC (heating and air conditioning) controls.
• ✔ Key fobs that suddenly stop working.

Your Straightforward BCM Installation Guide

Installing your new BCM is a manageable job for a confident DIYer. While the exact location varies by model (check the fitment list below), the process is generally similar.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning.
2. Locate the BCM: It’s typically found under the dashboard on the driver’s or passenger’s side, or in the center console area.
3. Disconnect Connectors: Carefully unclip the wiring harness connectors from the old BCM. They have locking tabs, so don’t force them. Note their orientation.
4. Remove the Old Module: Unbolt or unclip the old BCM from its mounting bracket.
5. Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all wiring harnesses.
6. Reconnect Battery: Reattach the negative battery terminal.
7. Perform Final Steps: Follow the crucial post-installation procedures outlined below to ensure full system functionality and safety.

Critical Post-Installation Steps

After installing your new 2010 STS Body Control Module, a few final procedures are required to sync it with your vehicle’s safety systems. These are not optional.

• Airbag System Reset: To clear the airbag warning light, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible high-level diagnostic tool. This re-establishes the security handshake between the BCM and the airbag system.
• Brake Pedal Position Sensor Relearn: Some models require a brake pedal position sensor recalibration. This ensures the brake lights and stability control systems function correctly.
• Security Relearn Procedure: Your vehicle may require a simple key-cycle security relearn to recognize the new BCM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes.

Will This Fit My Vehicle?

This BCM is a direct replacement for a wide range of General Motors vehicles and interchanges with numerous part numbers. Please verify your model and check the notes for location. This module replaces the following 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.