Restore Full Control and Eliminate Electrical Headaches
Are you battling frustrating electrical issues in your truck? Unpredictable power windows, flickering lights, a malfunctioning security system, or an HVAC system with a mind of its own can bring your work to a halt. These are classic signs of a failing Body Control Module. This genuine GM BCM, part number 25844480, is the definitive, pre-programmed solution to restore your vehicle’s electronic functions and your peace of mind. Specifically programmed to your truck’s VIN, it eliminates the need for a costly trip to the dealership for programming, making it a true plug-and-play fix.
Common Symptoms & Your Solution
A faulty BCM can cause a cascade of confusing problems. If you’re experiencing any of the following, this module is your solution:
- Intermittent or non-working interior and exterior lights
- Power windows, door locks, or mirrors failing to respond
- HVAC controls or blower motor operating erratically
- Security system malfunctions, causing no-start or stalling conditions
- An airbag warning light on the dash, often with DTC B1001
- Various communication-related Diagnostic Trouble Codes (DTCs)
Installing this pre-programmed 2013 GMC Sierra 3500 BCM directly addresses the root cause of these issues, restoring the reliable performance you depend on day in and day out.
Features & Benefits
- ✔ VIN-Programmed for Your Truck: We program the module to your vehicle’s specific VIN before shipping. This ensures perfect compatibility and allows for a simple, plug-and-play installation without any additional dealer programming.
- ✔ Restores Full Functionality: Regain complete and reliable control over your vehicle’s essential body electronics, from the power locks and windows to the climate control and security system.
- ✔ OEM-Quality & Durability: Manufactured to strict OEM standards, this BCM is built to withstand the demanding conditions of a work truck, ensuring long-lasting and dependable operation.
- ✔ Direct Interchange: This module is a direct replacement for a wide range of part numbers, including 15263497, 25835966, 15878753, 20939137, and more, guaranteeing a perfect fit for your 2013 GMC Sierra 3500 BCM repair.
- ✔ No Core Charge Required: Keep your old part without the hassle or expense of a core return, simplifying your repair process.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
Expert Insight from the Shop Floor
As a technician, I’ve seen countless GM trucks from this era with bizarre electrical issues that trace back to the BCM. One of the most overlooked aspects during replacement is the ground connection. A poor ground can cause the new module to act up or fail prematurely. When you install your new 2013 GMC Sierra 3500 BCM, take an extra five minutes to locate the main BCM ground point (typically on the metal dash support or A-pillar), remove the bolt, and clean the contact surfaces with a wire brush until they’re shiny. This simple step ensures a solid connection and can prevent a world of headaches down the road.
Frequently Asked Questions
What does a BCM do on my Sierra 3500?
The Body Control Module (BCM) acts as the central computer for your truck’s body electronics. It manages non-engine related functions like the interior/exterior lights, power windows, door locks, security system, wipers, and HVAC climate controls.
Is this BCM truly “plug and play”?
Yes. Because we pre-program the module to your vehicle’s VIN, it will integrate seamlessly with your truck’s existing systems right out of the box. This allows you to avoid a separate, expensive programming session at a dealership.
Why is my airbag light on after installing the new BCM?
In some cases, the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). If the airbag light is on after installation (often with code B1001), a procedure called “Setup SDM Primary Key in BCM” must be performed with a professional-grade scan tool. This is a quick sync procedure that a qualified technician can perform.
Do I need to send my old module back?
No. We do not require a core charge for this part. You can keep or dispose of your old module at your convenience, which saves you time and return shipping costs.
How do I know if my BCM is the problem?
Common signs include multiple, unrelated electrical failures (e.g., windows and radio not working), security system issues, or specific BCM-related trouble codes found with a scanner. If you’re experiencing a cluster of these symptoms, the BCM is the most likely culprit.
Where is the BCM located on a 2013 GMC Sierra 3500?
The BCM is typically located inside the cabin, under the driver’s side of the dashboard, often near the steering column or integrated into the junction block/fuse panel.