Are you battling frustrating electrical gremlins in your GM truck or SUV? Intermittent wipers, flickering lights, or a malfunctioning security system are common signs of a failing Body Control Module (BCM). The BCM acts as the central command for your vehicle’s body electronics, and when it fails, it can cause a cascade of confusing issues. This genuine GM BCM, part number 25844480, is the definitive solution for restoring order and reliability to your vehicle’s essential functions.
Specifically designed for a wide range of 2007-2013 GM vehicles including the Cadillac Escalade, Chevrolet Silverado, GMC Sierra, and Tahoe, this module arrives pre-programmed to your vehicle’s specific VIN. This crucial step ensures a true plug-and-play installation, eliminating the need for an expensive trip to the dealership for programming. Simply install the module, and it will communicate seamlessly with your vehicle’s existing systems.
From the Diagnostic Bay
We had a 2009 Silverado 1500 in the shop that was driving the owner crazy. The radio would randomly shut off, the dome light would stay on, and occasionally the power locks wouldn’t respond. We checked grounds and wiring harnesses for hours with no luck. On a hunch, we swapped in a programmed BCM. Instantly, all the bizarre electrical issues vanished. It was a classic case of an internally failing BCM creating phantom problems that are nearly impossible to trace with conventional diagnostics.
Solving Common 2007-2011 Escalade EXT BCM Issues
A faulty BCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a failing BCM is the likely culprit. Replacing it with our VIN-programmed unit is the most direct path to a lasting repair, restoring the performance and security you expect from your vehicle.
Symptoms of a Failing GM Body Control Module
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or failing to turn on.
- ✔ HVAC system problems, including an inoperative blower fan or incorrect temperature control.
- ✔ Vehicle security system malfunctions, leading to no-start conditions or random alarm activation.
- ✔ Airbag warning light illuminated on the dashboard, often accompanied by DTC B1001.
- ✔ Unexplained parasitic battery drain that leaves you with a dead battery.
- ✔ Communication errors with other vehicle modules, triggering various warning lights.
Installation and Post-Install Procedures
Installation is straightforward for those with basic mechanical skills. The BCM is typically located under the driver’s side dashboard, near the steering column. After swapping the module, some vehicles may require additional steps:
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed using a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation.
This module is a direct replacement for multiple part numbers, including: 25790508, 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related electronic functions. This includes power windows, door locks, the security system, interior and exterior lighting, wipers, and the HVAC system.
Is this module ready to install right out of the box?
Yes! We pre-program the module to your vehicle’s VIN before shipping. This ensures it works correctly with your specific options and security system, eliminating the need for dealer programming.
Where is the BCM located on my 2008 Sierra or 2010 Tahoe?
On most compatible GM trucks and SUVs from this era, the BCM is located under the driver’s side of the dashboard, typically to the left of the steering column.
My airbag light is on after installing the new BCM. What do I do?
This is normal in some cases. The new BCM needs to be electronically introduced to the airbag system (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure.
Do I have to send my old part back?
No, there is no core charge for this part. You can keep your old module without any additional fees.