End the Electrical Headaches in Your GM Truck or SUV
Are you chasing down strange electrical problems in your Sierra, Silverado, Tahoe, or Yukon? One minute the power windows work, the next they don’t. The HVAC blower has a mind of its own, and mysterious warning lights keep popping up on your dash. These frustrating, intermittent issues often point to one central culprit: a failing Body Control Module (BCM). Stop replacing individual switches and relays and fix the root cause with our fully programmed BCM, designed to restore your vehicle’s factory functions and give you back a truck you can depend on.
Common Symptoms & Your Solution
A faulty BCM can disrupt your vehicle’s entire electrical network. If you’re experiencing any of the following, this module is the definitive solution you need:
- Intermittent or complete loss of HVAC blower motor control
- Erratic power window and door lock operation
- Interior or exterior lights not working correctly
- Airbag warning light on the dash, often with DTC B1001
- Security system malfunctions or no-start conditions
- A variety of diagnostic trouble codes (DTCs) related to body systems
This programmed 25844479 BCM arrives ready to install, directly addressing these problems by restoring clear communication between your vehicle’s electronic components.
Features & Real-World Benefits
- ✔ Plug & Play Installation: We pre-program this module to your vehicle’s specific VIN number. This means no expensive trips to the dealership for coding—simply install it and restore full functionality in minutes.
- ✔ Fixes Annoying Glitches: Regain reliable control over your lights, locks, windows, wipers, and climate control. This module ensures all body accessories operate exactly as they did from the factory.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications, ensuring long-lasting durability and perfect integration with your GM’s electrical system.
- ✔ Broad Compatibility: This module is a direct replacement for a wide range of part numbers, including 25835966, 15943678, 20939137, and 22860591, making it a versatile solution for numerous GM trucks and SUVs from 2007-2013.
- ✔ Warranty Protection: This unit is backed by our one-year replacement warranty.
- ✔ No Core Charge: Keep your old part. There’s no need to worry about the cost or hassle of sending the original module back to us.
Expert Insight: Why VIN Programming is Non-Negotiable
As a technician with over 20 years on the floor, I’ve seen countless vehicle owners waste time and money on BCMs that weren’t programmed. A BCM is the ‘brain’ for your vehicle’s body electronics; it’s not a simple one-size-fits-all part. It needs to know your vehicle’s specific options—like whether you have power-folding mirrors, a sunroof, or a specific security system. Our VIN programming service isn’t just a convenience; it’s a critical step that ensures every component communicates correctly from the moment you plug it in. This is how you get a true, lasting repair without the dealership runaround.
Frequently Asked Questions
Do I need to take my vehicle to the dealer after installation?
No. This module comes pre-programmed to your vehicle’s VIN. In most cases, installation is a simple plug-and-play process that does not require any additional dealer programming.
What if my airbag light is still on after installing the new BCM?
If the airbag light persists (often with code B1001), it’s because the BCM needs to be electronically ‘introduced’ to the airbag system’s SDM. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. This is a quick procedure for any well-equipped independent shop.
Where is the BCM located on my truck?
On most 2007-2013 GM trucks and SUVs like the Sierra, Silverado, and Tahoe, the BCM is located under the driver’s side of the dashboard, near the steering column. It is typically accessible after removing the lower dash panel.
Is this a difficult part to install myself?
For someone with basic mechanical skills, the installation is straightforward and usually takes less than 30 minutes. It involves removing a few dash panels and disconnecting electrical connectors. However, always disconnect the battery before starting work on any vehicle electronics.
How do I know if this part number will fit my vehicle?
This programmed 25844479 BCM replaces many original part numbers. The best way to confirm is to check the part number on your original module or consult the detailed fitment list on this page. If you’re unsure, our expert support team is here to help you verify compatibility.