Fix Your Truck’s Electrical Headaches for Good
If you’re dealing with a 2007-2011 GMC Sierra 3500 that seems to have a mind of its own—flickering lights, a dead climate control panel, or power locks that work one minute and not the next—you’re likely facing a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can create a cascade of frustrating and hard-to-diagnose issues. This OEM-quality replacement, part number 25790508, is the definitive solution to restore full functionality and peace of mind.
We take the guesswork and dealership hassle out of the repair. Each module is professionally programmed to your truck’s specific Vehicle Identification Number (VIN) before it ships. This means no expensive trips to the dealer for programming. It arrives ready for a true plug-and-play installation, immediately syncing with your vehicle’s existing systems and options. Get your heavy-duty truck back to being reliable and fully functional with a dependable BCM that’s built to last.
From the Diagnostic Bay: The Case of the “Haunted” Sierra
I had a 2009 Sierra 3500 roll into my shop last month with a list of complaints that sounded like something out of a ghost story. The dome lights would randomly turn on, the driver’s window wouldn’t roll down, and the radio would shut off unexpectedly. The owner had already replaced the battery and checked fuses, but the gremlins persisted. After hooking up my scanner, I saw a handful of communication codes pointing to the BCM. A quick check of the main ground points (always a good first step!) confirmed they were solid. We swapped in a VIN-programmed BCM, and in less than 10 minutes, every single issue was gone. It’s a perfect example of how this single component can solve a dozen problems at once.
Is Your Sierra 3500 Showing These Electrical Gremlins?
- ✔ Power windows, mirrors, or door locks operating intermittently or not at all.
- ✔ HVAC and climate controls are unresponsive, or the blower motor is stuck on or off.
- ✔ The security system is malfunctioning, causing no-start or stalling conditions.
- ✔ An airbag warning light is illuminated on the dash, often with a DTC like B1001.
- ✔ Interior or exterior lights flicker, stay on, or fail to activate.
- ✔ Unexplained battery drain when the vehicle is turned off.
A Straightforward Guide to BCM Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- ✔ Locate the Module: Find the BCM located under the driver’s side of the dashboard, usually near the steering column.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so press them firmly to release. Once disconnected, unclip or unbolt the old module from its mounting bracket.
- ✔ Install the New BCM: Mount the new module in the same position and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Start the truck and test all body functions—lights, windows, locks, wipers, and HVAC—to confirm the repair was successful.
Verified Vehicle Compatibility
This Body Control Module is a direct-fit replacement for a wide range of General Motors trucks and SUVs. While this page focuses on the 2007-2011 Sierra 3500 Pickup BCM, it is also compatible with the following vehicles. Always verify your part number before ordering.
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-11
SIERRA 3500 PICKUP 07-11
SIERRA DENALI 07-11
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-11
SILVERADO 3500 PICKUP 07-11
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 07-11
This module interchanges with part numbers: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, 22860591.
Do I need to have this BCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you time and money on dealership programming fees.
What if my airbag light is on after installation?
In some cases, an airbag light (DTC B1001) may appear. This requires a ‘Setup SDM Primary Key in BCM’ procedure using a professional scan tool to sync the new BCM with the airbag system. This is a simple relearn procedure, not full programming.
Is there a core charge for my old part?
No, there is no core charge. You can keep or dispose of your old module without the hassle of sending it back.
Will this fix my truck’s no-start problem?
If the no-start is caused by the factory security system (Passlock/VATS) being controlled by a faulty BCM, then yes, this module will resolve that issue. The VIN programming ensures it communicates correctly with your ignition and powertrain modules.
What is the warranty on this part?
This module comes with a one-year warranty, guaranteeing its quality and reliability for your daily driving or work-truck scenarios.