Restore Full Electrical Function to Your GM Truck or SUV
Are you battling persistent electrical gremlins in your Chevrolet Silverado, GMC Sierra, or Cadillac Escalade? Intermittent power windows, a malfunctioning HVAC system, flickering lights, or strange security system behavior are common indicators of a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and difficult-to-diagnose issues. This genuine GM BCM, interchangeable with part number 15943678, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Common Symptoms of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights staying on, flickering, or failing to turn on.
- ✔ HVAC and climate control functions are unresponsive or the blower motor works intermittently.
- ✔ The security system acts up, causing no-start conditions or random alarm activation.
- ✔ An active airbag warning light, often accompanied by DTC B1001.
- ✔ Unexplained battery drain while the vehicle is parked.
- ✔ Various communication-related Diagnostic Trouble Codes (DTCs).
Why Choose Our Pre-Programmed Sierra Body Control Module?
Replacing a BCM traditionally required a costly trip to the dealership for programming. Our service eliminates that step entirely. We flash the module with the latest GM software updates and program it using the VIN you provide at checkout. This ensures that the module communicates flawlessly with your vehicle’s other electronic systems right out of the box. You get a reliable, OEM-quality part that restores function without the hassle and expense of dealer service. This module is a direct replacement for a wide range of part numbers, including 25844480, 25835966, 15926094, and 22860591, among others.
Installation and Post-Install Procedures
Installation is straightforward for most DIY mechanics. The BCM is typically located under the driver’s side dashboard, near the steering column. The physical swap takes only a few minutes. However, be aware of potential post-installation steps:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary. This requires a professional-grade scan tool and syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation and traction control system performance.
There is no core charge for this module, so you can keep your old part without the hassle of returning it.
Frequently Asked Questions
Will this BCM be plug-and-play for my truck?
Yes! We program the module to your vehicle’s VIN before shipping. This ensures it is ready for installation and operation upon arrival, with no need for additional dealership programming for most functions.
What tools do I need for installation?
Basic hand tools like a socket set and a trim removal tool are typically all that’s needed for the physical installation. For potential post-install procedures like an airbag light reset, a professional diagnostic scan tool is required.
My airbag light is on after installing the new BCM. What do I do?
This is a common security measure. You will need to have a qualified technician with an advanced scan tool perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Do I need to return my old BCM?
No. We do not require a core return for this part. You can keep your old module, which means no core charge and no return shipping to worry about.
How do I know if my BCM is actually the problem?
A failing BCM typically causes multiple, unrelated electrical issues. If your power locks, windows, and radio are all acting up, the BCM is a likely culprit. A professional diagnosis with a scan tool that can communicate with the BCM is the best way to confirm.