Is your Chevrolet Avalanche or GMC Sierra experiencing bizarre electrical problems?
If your power windows have a mind of their own, your HVAC controls are unresponsive, or your security light is flashing for no reason, you’re likely dealing with a failing Body Control Module (BCM). The BCM is the central command center for your truck’s body electronics, and when it malfunctions, it can cause a cascade of frustrating and difficult-to-diagnose issues. This OEM-quality replacement BCM, part number 15943678 (interchangeable with 25844480 and others), is the definitive solution to restore your vehicle’s electronic systems to perfect working order.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We pre-program the module to your vehicle’s specific VIN before shipping. This means you can skip the expensive trip to the dealership for programming. It arrives at your door ready for a true plug-and-play installation, getting you back on the road faster and with less hassle.
Common Symptoms of a Failing BCM
- ✔ Non-functional or erratic power windows, door locks, or mirrors.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ Illuminated airbag warning light, often with DTC B1001.
- ✔ Vehicle security system malfunctions, leading to no-start or stalling conditions.
- ✔ Interior or exterior lights staying on or not turning on at all.
- ✔ Communication errors with other vehicle modules.
- ✔ Wipers operating intermittently or not at all.
Why Choose Our Pre-Programmed Avalanche Body Control Module?
Replacing your BCM shouldn’t be a complicated ordeal. Our module simplifies the repair process from start to finish. It’s a direct-fit replacement for a wide range of GM trucks and SUVs, including the Chevrolet Silverado, Tahoe, Suburban, and GMC Sierra and Yukon models. By programming the unit with the latest GM software updates tied to your VIN, we ensure optimal performance and compatibility right out of the box. Installation is straightforward for any DIYer or professional mechanic, typically located under the driver’s side dashboard and requiring only basic tools. While the physical swap takes minutes, be aware of potential post-installation steps. If your airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Similarly, a ‘Brake Pedal Position Relearn’ may be required on some models. However, for most installations, no further steps are needed.
Frequently Asked Questions
What does a Body Control Module do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like your lights, power windows, door locks, security system, climate controls, and wipers.
Will this BCM fit my specific truck?
This module fits a wide range of 2007-2013 GM vehicles. Please review the detailed fitment list on this page to confirm compatibility with your exact year, make, and model.
Do I need to program this module after I install it?
No. This module comes pre-programmed to your vehicle’s VIN. It is a plug-and-play solution that does not require a trip to the dealership for programming, saving you time and money.
What if my airbag light is on after installation?
If the airbag light is on, it means the new BCM needs to be synced with the airbag system’s SDM. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. This is a simple procedure for any qualified mechanic.
Is this part difficult to install?
The physical installation is very easy. The BCM is typically located under the steering column and can be swapped in under 15 minutes with basic hand tools.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any extra fees or hassle.