Restore Full Electrical Control to Your GM Truck or SUV
If your 2013 GMC Sierra 3500 is plagued by bizarre electrical issues—such as malfunctioning power windows, erratic door locks, intermittent wipers, or a dead HVAC system—a failing Body Control Module (BCM) is the most likely culprit. 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 seemingly unrelated problems. This genuine OEM-quality GM BCM, part number 25971916 (interchangeable with 25844480), is the definitive solution to restore your vehicle’s functionality and reliability.
Common Symptoms of a Failing GM BCM
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Power windows, door locks, or mirrors operate intermittently or not at all.
- ✔ Interior or exterior lights (headlights, dome lights, dash lights) flicker or fail to work.
- ✔ The HVAC system is unresponsive, or the blower motor works sporadically.
- ✔ Your vehicle’s security system malfunctions, causing false alarms or no-start conditions.
- ✔ The airbag warning light is illuminated, often with a DTC like B1001.
- ✔ Wipers get stuck, operate at the wrong speed, or won’t turn off.
- ✔ You notice persistent battery drain when the vehicle is off.
The Plug-and-Play Advantage: Pre-Programmed for Your VIN
Replacing a BCM isn’t just about swapping hardware. A new module must be programmed to your vehicle’s specific Vehicle Identification Number (VIN) to communicate with other onboard computers. Our service eliminates this costly and time-consuming step. We program this 2013 Sierra 3500 BCM with the latest GM software updates specifically for your truck before it ships. This ensures a true plug-and-play installation, saving you a trip to the dealership and hundreds of dollars in programming fees. Simply install the module, and you’re ready to go.
Installation and Post-Install Considerations
The BCM is typically located under the driver’s side dashboard, near the steering column, making for a straightforward replacement that often takes less than 15 minutes. While the module is plug-and-play for most functions, please be aware of these potential post-installation steps:
- Airbag System Sync: If the airbag warning light remains 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: In some cases, a brake pedal position sensor relearn may be required to ensure proper brake light and traction control operation.
Frequently Asked Questions
What does a Body Control Module actually do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related electronic functions. This includes power windows, locks, lights, wipers, security system, and climate controls, ensuring they all work together seamlessly.
Is this BCM really plug-and-play?
Yes, it is. We pre-program the module to your vehicle’s specific VIN before shipping. This means you can install it yourself without needing to visit a dealer for expensive programming.
Where is the BCM located on my 2013 Sierra 3500?
You will typically find the BCM located under the driver’s side dashboard, often to the left of the steering column. It’s usually accessible by removing a lower dash panel.
Will this fix my airbag light with code B1001?
A faulty BCM is a common cause of the B1001 code. Replacing it will likely solve the root problem, but you may need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light after installation.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your old module, which saves you the time and hassle of shipping it back.