Restore Full Electrical Function to Your GM Truck or SUV
Is your 2013 GMC Sierra Denali 3500 experiencing bizarre electrical issues? From flickering lights and malfunctioning power windows to a non-responsive HVAC system, these are classic signs of a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating problems. This genuine quality GM BCM, part number 25790509 (interchangeable with 25844480 and others), is the definitive solution. It arrives pre-programmed to your vehicle’s specific VIN, ensuring a seamless, plug-and-play installation without requiring a trip to the dealership.
From the Diagnostic Bay
We had a 2013 Sierra Denali 3500 come in that was driving the owner crazy. The radio would randomly change stations, the dome lights would stay on, and the power locks worked intermittently. Standard diagnostic checks on individual components showed nothing. We suspected the BCM, and after swapping in a VIN-programmed module, every single ghost in the machine vanished. The owner was thrilled to have his truck back to normal with a simple, 10-minute fix right in the bay.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ HVAC system failures, including erratic blower fan speeds or inability to control temperature.
- ✔ Illuminated airbag warning light, often with diagnostic trouble code (DTC) B1001.
- ✔ Malfunctioning interior or exterior lights (headlights, taillights, dome lights).
- ✔ Security system faults, leading to no-start conditions or false alarms.
- ✔ Unpredictable behavior from wipers or radio controls.
Your Direct Solution: The Programmed 2013 Sierra Denali BCM
Don’t let electrical gremlins sideline your truck. This module is meticulously prepared to match your vehicle’s factory settings. By providing your VIN at checkout, you receive a unit that is ready for immediate installation. This process not only restores functionality but also ensures all integrated systems, like security and airbag modules, communicate correctly from the moment it’s connected.
Key Features & Benefits
- ✔ VIN Programmed: Arrives ready for plug-and-play installation, no dealership programming needed.
- ✔ Restores Functionality: Fixes common electrical issues related to lights, locks, windows, and climate control.
- ✔ OEM-Quality: Built to stringent General Motors standards for reliability and long service life.
- ✔ Broad Compatibility: Direct replacement for numerous part numbers, including 25835966, 15940214, and 22860591, fitting a wide range of GM trucks and SUVs from 2007-2013.
- ✔ No Core Charge: Keep your old part without the hassle of returning a core.
Installation & Post-Install Notes
The BCM is typically located under the driver’s side dashboard, near the steering column. Installation is straightforward for most DIY mechanics. However, please be aware of potential post-installation procedures. If the airbag warning light remains on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ function. Additionally, some models may require a ‘Brake Pedal Position Relearn’ to ensure proper brake light and traction control operation. Always consult a factory service manual for your specific vehicle if you are unsure.
Frequently Asked Questions
What does the Body Control Module do on my Sierra Denali?
The BCM is a computer that controls most of the non-engine related electronics in your truck. This includes power windows, door locks, the security system, interior and exterior lighting, wipers, and the HVAC system.
Is this BCM difficult to install?
The physical installation is relatively simple, usually taking less than 15 minutes. It’s located under the dashboard. Since our modules come pre-programmed, you avoid the complex step of programming it at a dealership.
Do I have to send my old part back?
No. This part has no core charge, so you can keep your original module without any extra fees or hassle.
Why is my airbag light on after installing the new BCM?
This can happen because the new BCM needs to be electronically ‘introduced’ to the airbag system’s SDM. A professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Will this part fit other vehicles besides a 2013 Sierra Denali 3500?
Yes, this BCM is compatible with a wide range of 2007-2013 GM vehicles, including the Silverado, Tahoe, Suburban, Yukon, and Escalade. Please verify your part number or use our fitment tool to confirm compatibility.