End Frustrating Electrical Problems in Your GM Truck
If you’re dealing with a GMC Sierra that seems to have a mind of its own—flickering lights, a dead climate control panel, or power windows that won’t budge—the Body Control Module (BCM) is the likely culprit. As the central nervous system for your truck’s body electronics, a failing BCM can cause a cascade of confusing issues. This isn’t just an inconvenience; it can affect vehicle security and safety. This OEM-quality replacement BCM, interchangeable with part number 15878753, is the definitive solution for restoring order and reliability to your vehicle.
We take the guesswork and high dealership costs out of the equation. Each module is expertly programmed to your vehicle’s specific VIN before shipping. This ensures it communicates perfectly with your truck’s other systems right out of the box, eliminating the need for expensive scan tools or a trip to the dealer for programming. It’s a true plug-and-play fix designed for both professional mechanics and determined DIYers.
A Technician’s Notebook
I once had a 2009 Silverado in my bay with the strangest symptoms. The radio would cut out, the dome light would flicker on bumps, and the driver’s window worked only when it wanted to. The owner had already replaced the battery and checked fuses. After scanning, I found a handful of communication codes but nothing concrete. Experience pointed me to the BCM. A quick inspection revealed a corroded ground wire near the BCM’s mounting point—a common issue on these trucks. We replaced the module with a pre-programmed unit and cleaned the ground connection. Problem solved. It’s a powerful reminder: when you replace a 2007-2011 Sierra 3500 BCM, always inspect and clean your grounds!
Is Your Sierra Showing These Electrical Faults?
- ✔️ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔️ HVAC controls are unresponsive, or the blower motor is stuck on or off.
- ✔️ An airbag warning light is illuminated on the dash, often with DTC B1001.
- ✔️ The anti-theft or security system malfunctions, causing no-start conditions or random alarms.
- ✔️ Exterior or interior lights flicker, stay on, or fail to turn on.
- ✔️ A variety of communication DTCs (U-codes) are stored in the system.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative battery terminal and wait a few minutes before starting work.
- ✔ Locate the BCM: On most GM trucks of this era, the BCM is located under the driver’s side of the dashboard, near the steering column.
- ✔ Remove Connectors: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be depressed.
- ✔ Swap the Module: Unclip or unbolt the old BCM from its bracket and install the new one in its place.
- ✔ Reconnect and Test: Plug the connectors firmly into the new BCM, reconnect the battery, and turn the key to the ‘On’ position. Test all functions like lights, locks, and windows to confirm the repair.
Post-Installation Note: In some cases, particularly if you had an airbag light, a professional scan tool may be needed to perform the ‘Setup SDM Primary Key in BCM’ function to clear the light. This syncs the new BCM with the airbag system. A brake pedal position relearn may also be required on certain models.
Will This Fit My Truck?
This BCM is a direct replacement for a wide range of General Motors trucks and SUVs. While this page is focused on the 2007-2011 Sierra 3500 BCM, it is also verified to fit the following models. It is interchangeable with part numbers 15263363, 15263497, 15878753, 15943678, 25835966, 20939137, and more.
ESCALADE 07-11
ESCALADE ESV 07-11
ESCALADE EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-13
SIERRA 3500 PICKUP 07-13
SIERRA DENALI 07-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-13
SILVERADO 3500 PICKUP 07-13
SUBURBAN 1500 07-11
SUBURBAN 2500 07-11
TAHOE 07-11
YUKON 07-11
YUKON XL 1500 07-11
YUKON XL 2500 07-11
Note: For 2007 models, this fits the ‘New Body Style’ (smooth door skin). Please verify your part number to ensure compatibility.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before it ships. It arrives ready for installation, saving you time and money.
Is there a core charge for my old part?
There is absolutely no core charge. You can keep your old module without any hassle or need to return it.
My airbag light is on. Will this fix it?
If the airbag light is caused by a faulty BCM (like with code B1001), this part will resolve the root cause. However, after installation, you may need a scan tool to perform the ‘Setup SDM Primary Key’ procedure to turn the light off.
What tools are required for installation?
Installation typically requires only basic hand tools, like a socket set or a screwdriver, to access the module under the dashboard. No special tools are needed for the physical swap.
What happens if I install it and still have problems?
While this BCM resolves the most common electrical faults, other issues like poor grounds or wiring problems can cause similar symptoms. We recommend checking all related connections. The part is also backed by a one-year warranty for peace of mind.