Tired of Unpredictable Electrical Problems in Your GM Truck?
As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable truck into a source of daily frustration. One minute your A/C works, the next it doesn’t. Your power locks have a mind of their own, and a persistent airbag light stares back at you from the dash. These aren’t just annoyances; they’re signs that the central command for your vehicle’s body electronics is failing. This isn’t a problem you have to live with. We offer a dependable, straightforward fix.
This OEM-quality Body Control Module, equivalent to part number 25790509, is the definitive solution for your 2013 Sierra 3500 Body Control Module issues and a wide range of other 2007-2013 GM trucks and SUVs. The most critical feature? It arrives at your door fully programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership visits and complex programming tools, allowing you to get your truck back to 100% functionality quickly and affordably.
A Technician’s Notebook: The BCM That Wasn’t Broken
I once had a 2011 Silverado 2500 in the bay with classic BCM failure symptoms—flickering interior lights, intermittent radio, and a security light that wouldn’t turn off. The customer had already bought a module from another seller and was frustrated it didn’t fix the issue. Before condemning his new part, I did a 10-minute check of the basics. I found a corroded ground strap on the frame rail right below the driver’s door. After cleaning the connection point to bare metal, every single electrical issue vanished. The original BCM was fine. This is why I always tell my customers: when you replace your BCM, take five extra minutes to inspect and clean the main ground points. It can save you from a world of diagnostic headaches.
Is Your Truck Showing These Symptoms?
- ✔ The airbag warning light is illuminated, often with a DTC B1001 (Setup SDM Primary Key in BCM) stored.
- ✔ Erratic or non-functional power windows, door locks, or exterior lights.
- ✔ HVAC controls work intermittently, or the blower motor cuts out unexpectedly.
- ✔ The anti-theft or security system malfunctions, causing no-start or stalling conditions.
- ✔ A cluster of seemingly unrelated electrical issues that defy simple diagnosis.
- ✔ Communication errors with other modules, such as U-codes.
Your 5-Minute Installation Guide
Replacing the BCM is one of the easier electronic repairs you can perform. The module is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the BCM: On most GM trucks, it’s a black box with multiple large connectors, secured by clips or small bolts under the dash.
- Disconnect and Remove: Carefully unplug the electrical connectors. Most have a locking tab that needs to be depressed or lifted. Once disconnected, unclip or unbolt the old module and remove it.
- Install the New Module: Seat your new, VIN-programmed BCM in the mounting bracket and securely reconnect all electrical harnesses. You should hear a click as they lock into place.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions: lights, wipers, locks, windows, and HVAC to confirm the repair.
- Post-Install Checks: If your airbag light remains on, a simple “Setup SDM Primary Key” procedure is needed using a capable bi-directional scan tool. This syncs the new BCM with the airbag system. On some models, a Brake Pedal Position relearn may also be required.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for a wide array of General Motors vehicles. It is interchangeable with part numbers including 25835966, 15943678, 25790508, 25790509, 25844479, and 20939137. Please verify your vehicle from the list below:
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11 (Incl. Denali)
SIERRA 2500/3500 PICKUP 07-13 (Incl. Denali)
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500/3500 PICKUP 07-13
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 1500/2500 07-11
Note: For 2007 models, this fits the ‘new style’ with a smooth door skin. For some 2010 and 2013 models, please confirm ID 25835966.
Frequently Asked Questions
Frequently Asked Questions
Why is VIN programming so important for a BCM?
The BCM is programmed to your vehicle’s specific options, security system, and powertrain. Our VIN programming ensures all features work correctly out of the box, just like the original, and prevents the anti-theft system from disabling your truck. It saves you a trip to the dealer for costly programming.
Do I need to send my old part back?
No. There is absolutely no core charge for this part. You can keep your old module or dispose of it without any hassle or extra fees.
My airbag light came on after installation. Is the part defective?
No, this is a normal security procedure for GM vehicles. The new BCM needs to be electronically ‘introduced’ to the airbag system (SDM). This requires a scan tool with the function ‘Setup SDM Primary Key in BCM’ to sync the components and turn off the light. Most professional repair shops can perform this in minutes.
What tools do I need for this job?
For most models, you’ll only need basic hand tools, like a socket set or a small pry tool, to access the module under the dash. The most important tool is a capable scan tool if the post-install airbag sync procedure is required.
Is this a reliable, long-term fix for my 2013 Sierra 3500 Body Control Module?
Absolutely. This module is built to meet or exceed OEM specifications for durability and performance. It’s backed by our one-year warranty, giving you peace of mind that you’re making a lasting repair.