Restore Full Electrical Function to Your GM Truck or SUV
Is your Silverado, Sierra, or Tahoe suffering from strange electrical problems? Intermittent wipers, flickering lights, or non-responsive power windows and door locks are common signs of a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics. When it fails, it can cause a cascade of frustrating issues. This genuine quality GM 25844480 Body Control Module is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation.
From the Diagnostic Bay
We had a 2013 Sierra Denali 2500 in the shop that was a real head-scratcher. The owner complained of the radio turning off randomly, the driver’s side window not working, and an airbag light that wouldn’t go away. He’d already replaced the window switch and checked fuses. We traced the wiring for hours looking for a short. Finally, we hooked up our high-level scanner and saw communication dropouts from the BCM. A quick swap with this pre-programmed module solved every single issue in under 10 minutes. It’s often the central component that’s the culprit, not the individual switches or wires.
Common Symptoms of a Failing BCM
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ Interior or exterior lights behaving erratically (staying on, not turning on, or flickering).
- ✔ HVAC and climate control functions failing, including blower motor issues.
- ✔ Vehicle security system malfunctions or prevents the engine from starting.
- ✔ An active airbag warning light, often with DTC B1001.
- ✔ Unexplained battery drain while the vehicle is off.
- ✔ Wipers operating on their own or not responding to the switch.
The Plug-and-Play Solution: A Pre-Programmed Sierra Body Control Module
Don’t waste time and money at the dealership for programming. We handle it for you. Before shipping, we program this module with the latest GM software updates using your vehicle’s VIN. This ensures that it communicates perfectly with your truck’s other electronic systems right out of the box. This direct-fit Sierra Body Control Module restores the precise, reliable operation you expect from your vehicle’s electronics, from the power locks to the climate control.
Installation and Post-Install Notes
Installation is straightforward for most DIY mechanics. The BCM is typically located under the driver’s side dashboard, near the steering column. Simply disconnect the negative battery terminal, unplug the electrical connectors from the old module, remove it, and install the new one. While the module is plug-and-play for most functions, please note:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure is required. This can be done with a compatible high-level diagnostic tool and syncs the new BCM with the airbag system.
- Brake Pedal Position: In some cases, a brake pedal position sensor relearn may be necessary to ensure proper brake light and traction control operation.
This module is a direct replacement for a wide range of part numbers, including: 15263497, 25835966, 15263363, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
Is this Body Control Module ready to install?
Yes! This module is fully programmed to your vehicle’s VIN before it ships. This makes it a plug-and-play installation, with no need for an expensive trip to the dealership for programming.
How do I know if my BCM is the problem?
A failing BCM typically causes multiple, unrelated electrical issues. If your power windows, locks, lights, and HVAC are all acting up, the BCM is a very likely cause. A professional scan for BCM-specific trouble codes can confirm the diagnosis.
Where is the BCM located on my 2013 Sierra Denali 2500?
On most 2007-2013 GM trucks and SUVs, including the Sierra, Silverado, and Tahoe, the BCM is located under the driver’s side dashboard, to the left of the steering column.
What if the airbag light stays on after I install the new BCM?
This is a normal security procedure. The new BCM needs to be synced with the vehicle’s Sensing and Diagnostic Module (SDM). A mechanic with a high-level scan tool can perform the ‘Setup SDM Primary Key in BCM’ function in a few minutes to resolve this.
Is there a core charge for my old part?
No, there is no core charge for this part. You can keep your old module without any hassle or extra cost.