Are you battling frustrating electrical problems in your GM vehicle? Issues like flickering lights, malfunctioning power windows and locks, or a security system that acts up on its own are common signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a wide range of perplexing and intermittent issues. This replacement Body Control Module, part number 25826125, is the definitive solution to restore your vehicle’s functionality and reliability.
From the Diagnostic Bay
We had a 2011 Express 2500 work van come into the shop with a complaint of a dead battery every morning. The owner had already replaced the battery and alternator, but the problem persisted. After a thorough parasitic draw test, we traced the issue to the BCM. It wasn’t properly shutting down the interior lighting circuit, causing a slow drain overnight. Swapping in a VIN-programmed BCM like this one solved the problem instantly. The van was back on the road for the customer the next day, no more dead batteries.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working headlights, taillights, or interior lights.
- ✔ Power windows, door locks, or mirrors behaving erratically.
- ✔ The security system or keyless entry failing to operate correctly.
- ✔ The horn sounding randomly or not at all.
- ✔ Warning lights on the dashboard with no apparent cause.
- ✔ Communication errors with other vehicle modules (DTC U-codes).
- ✔ Unexplained battery drain when the vehicle is off.
Why Choose Our Programmed Express 2500 Van Body Control Module?
Getting your vehicle back to perfect working order shouldn’t be a hassle. Unlike a generic part from a local store or salvage yard, this BCM is specifically prepared for your vehicle. When you purchase from us, we will request your vehicle’s VIN. Our technicians then flash the module with the latest, most stable software updates directly from GM. This ensures complete compatibility with your vehicle’s specific options and systems, making installation as simple as possible. This is not a one-size-fits-all solution; it’s a tailored repair for your vehicle.
Simple Installation Process
Once you receive your pre-programmed module, the physical installation is straightforward. Locate your old BCM (typically under the dash), disconnect the battery, swap the modules, and reconnect the battery. While the programming is done for you, some vehicles may require a simple relearn procedure after installation.
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper function of brake lights and stability control systems.
This module is a direct replacement for a wide range of part numbers, including: 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, and 95151084.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that manages many of your vehicle’s non-engine related functions, such as power windows, locks, lights, wipers, security system, and interior accessories. It acts as a central hub for these systems.
Is this part difficult to install?
The physical replacement is typically simple, involving unplugging the old module and plugging in the new one. Since we pre-program it to your VIN, you avoid complex programming. However, some vehicles may require minor post-installation relearn procedures as noted in the description.
What information do you need from me?
After you complete your purchase, we will need your vehicle’s 17-digit VIN (Vehicle Identification Number) to program the BCM with the correct software and settings for your specific vehicle.
Do I have to return my old BCM?
No, there is no core charge for this part. You can keep your original module.
Will this fit other GM vehicles?
Yes, this BCM fits a wide variety of GM cars, trucks, and SUVs, including models like the Chevy Impala, GMC Acadia, Cadillac DTS, and Chevy Tahoe, among many others. Please verify your part number or consult the detailed fitment list.
What if my airbag light is on after I install it?
This can happen. It means the new BCM needs to be electronically introduced to the airbag module (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a professional-grade scan tool to resolve this.