Restore Full Electrical Function to Your GM Truck or SUV
Are you battling frustrating electrical problems in your vehicle? Flickering lights, unresponsive power windows, a malfunctioning security system, or a dead HVAC blower are common signs that your Body Control Module (BCM) has failed. The BCM is the central command center for your vehicle’s body electronics, and when it malfunctions, it can cause a cascade of confusing and seemingly unrelated issues. This genuine OEM-quality GM BCM, part number 25844480, is the definitive solution for a wide range of 2007-2013 GM trucks and SUVs, including the Chevrolet Silverado, Tahoe, GMC Sierra, and Cadillac Escalade.
We recently had a 2013 Sierra in the shop where the owner was at his wit’s end. He’d already replaced the headlight switch and the driver’s window master switch, but the problems persisted and new ones kept appearing. The radio would cut out, and the airbag light was on intermittently. A comprehensive diagnostic scan revealed multiple communication loss codes with various modules. The root cause wasn’t the individual components; it was a failing BCM corrupting the data network. Installing this pre-programmed module solved every single issue in under 15 minutes, saving the customer from chasing endless electrical gremlins and replacing perfectly good parts.
Is Your Vehicle Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your BCM is the culprit:
- ✔ Unresponsive power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or fail to work at all.
- ✔ HVAC system failures, such as an inoperative blower fan or erratic temperature control.
- ✔ An illuminated airbag warning light, often accompanied by DTC B1001.
- ✔ Security system malfunctions causing no-start conditions, random alarm activation, or stalling.
- ✔ Intermittent windshield wiper operation or wipers that won’t park correctly.
- ✔ A cluster of seemingly unrelated diagnostic trouble codes (DTCs) stored in the vehicle’s memory.
The Perfect Solution for Your 2013 Sierra Body Control Module
Don’t settle for a generic part that requires expensive dealership programming. We simplify the repair process by pre-programming this module to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the BCM is loaded with the correct software and calibrations for your truck’s exact features and options. The result is a true plug-and-play component that restores function as soon as it’s installed, saving you time, money, and the headache of a trip to the dealer.
Installation and Post-Install Procedures
Installation is straightforward for the mechanically inclined. The BCM is typically located under the driver’s side dashboard near the steering column. After disconnecting the battery, you can access and replace the module. While the physical swap is simple, be aware of potential post-installation steps:
- Airbag System Sync: If the airbag warning light is illuminated after installation (often with code B1001), a ‘Setup SDM Primary Key in BCM’ procedure is required. This syncs the new BCM with the airbag system and must be performed with a professional-grade diagnostic scan tool.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure proper brake light and stability control function.
This module is a direct replacement for numerous part numbers, including: 15284816, 25835966, 15263363, 15263497, 15878753, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591. Plus, there is no core charge, so you can keep your old part without any extra hassle.
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM acts as the central hub for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, the security system, and the climate control system, ensuring they all work together seamlessly.
Why is VIN programming so important for this part?
VIN programming loads the module with the specific software and settings for your truck’s unique configuration (e.g., power seats, sunroof, specific lighting). Without it, the BCM won’t know how to operate these features, leading to incorrect function or complete failure of certain systems. Our pre-programming service eliminates the need for an expensive dealership visit.
Is this a difficult part to install myself?
The physical replacement is relatively simple, often taking less than 30 minutes. It’s usually located under the dash. However, be prepared for potential post-install electronic procedures like the airbag system sync, which requires a professional scan tool.
Will this fix my airbag light that is on with code B1001?
A faulty BCM is a common cause of this code. Replacing the module is the correct repair, but to turn off the light, you must perform the ‘Setup SDM Primary Key in BCM’ procedure with a capable scan tool after installation. The light will not go off on its own.
Is there a core charge for this module?
No, there is absolutely no core charge. You are not required to send your old, faulty module back to us, which saves you time and money on shipping.