Tired of Your Truck’s Electrical Gremlins?
Are you dealing with a frustrating array of electrical issues in your Silverado, Sierra, or Tahoe? Maybe the air conditioning works one minute and not the next, the power locks have a mind of their own, or a persistent airbag light is driving you crazy. These aren’t just minor annoyances; they’re signs that your vehicle’s central command center for body electronics—the Body Control Module (BCM)—is failing. Instead of spending a fortune on dealership diagnostics and programming fees, take control with this direct-fit, VIN-programmed BCM.
Common Symptoms & Your Solution
A faulty BCM can cause a cascade of seemingly unrelated problems. If you’re experiencing any of the following, this module is the definitive solution you’ve been looking for:
- Intermittent or non-functional HVAC controls and blower motor
- An airbag warning light that won’t turn off, often with DTC B1001
- Unresponsive power windows, door locks, or interior/exterior lights
- Security system malfunctions, causing no-start or stalling conditions
- A variety of diagnostic trouble codes related to body systems
This replacement 20939138 Silverado 3500 Body Control Module is engineered to resolve these issues and restore full, predictable functionality to your vehicle’s essential systems.
Features & Benefits
- ✔ Plug-and-Play Installation: We pre-program this module to your vehicle’s specific VIN before shipping. This means no expensive trips to the dealership for programming—just install it and go.
- ✔ Restores Full Functionality: Get your power windows, door locks, lights, wipers, and climate control working reliably again, just like they did from the factory.
- ✔ Solves Annoying Warning Lights: Specifically programmed with the latest GM updates to address common DTCs and clear persistent warning lights related to body systems.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications, ensuring dependable performance whether your truck is a daily driver or a dedicated workhorse.
- ✔ Broad Compatibility: A direct replacement for a wide range of part numbers, including 25835966, 15943678, 25844479, and more, ensuring a perfect fit for your GM truck or SUV.
- ✔ No Core Charge: Don’t worry about the hassle and expense of sending your old part back. You can keep it or dispose of it at your convenience.
- ✔ Warranty Protection: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Installation
As a technician, I’ve seen countless hours wasted when a new module isn’t programmed correctly. That’s why we handle the VIN programming before it leaves our facility. This critical step ensures the BCM communicates perfectly with your vehicle’s other computers, like the Engine Control Module (ECM) and Supplemental Inflatable Restraint (SIR) system. While the physical installation is simple (it’s usually under the dash and takes minutes), the programming is what makes this a true, hassle-free fix. For those rare cases where an airbag light persists, a simple ‘SDM Key Update’ with a pro-level scanner is all that’s needed—a quick procedure we outline in the instructions. This attention to detail ensures your 20939138 Silverado 3500 Body Control Module gets your truck back to 100% with minimal downtime.
Frequently Asked Questions
What exactly does a Body Control Module 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. When it fails, you experience the strange electrical issues this part is designed to fix.
Why is VIN programming so important?
VIN programming loads your vehicle’s specific software and options into the BCM. Without it, the module won’t know how to operate your truck’s features correctly, leading to system malfunctions or a complete failure to operate. Our pre-programming service saves you the time, cost, and hassle of a dealership visit.
Is this part difficult to install myself?
For most DIYers, the physical installation is straightforward. The BCM is typically located under the driver’s side dashboard or steering column and can be replaced in under 5 minutes with basic tools. Since we handle the programming, the most complex part of the job is already done for you.
What if the airbag light is still on after I install it?
In some cases, particularly if you had an airbag code like B1001, the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). This is done via a ‘Setup SDM Primary Key in BCM’ procedure using an advanced diagnostic scan tool. It’s a quick process for any professional shop if required.
Do I need to return my old BCM?
No. This product comes with no core charge. You are free to keep your original module without any extra fees or hassle.
Stop chasing electrical problems and install a permanent solution. This 20939138 Silverado 3500 Body Control Module will restore your vehicle’s systems and your peace of mind. Order yours today!