Restore Full Functionality to Your GM Truck
Are you chasing down bizarre electrical issues in your truck? One minute the radio works, the next it doesn’t. The power windows have a mind of their own, and you’re seeing random warning lights on the dash. Before you start tearing apart wiring harnesses, the culprit is very often a failing Body Control Module (BCM). This module is the central command center for your truck’s comfort and convenience features. Our replacement BCM, equivalent to part number 25971916, arrives pre-programmed to your vehicle’s specific VIN, making it a true plug-and-play solution that eliminates the need for an expensive trip to the dealership.
Is Your Truck Exhibiting These Electrical Gremlins?
A faulty BCM can manifest in numerous frustrating ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Intermittent or total failure of power windows, door locks, or interior/exterior lighting.
- ✔ HVAC system acting erratically, with the blower motor not working or climate controls being unresponsive.
- ✔ An active airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Vehicle security system malfunctions, causing no-start conditions or random alarm activation.
- ✔ Unexplained battery drain or communication errors with other modules on the vehicle network.
From the Diagnostic Bay
I recently had a 2013 Sierra Denali 3500 in the shop with a classic ‘ghost in the machine’ problem. The owner had already replaced the battery and checked all the fuses trying to solve an intermittent no-start and flickering headlights. After hooking up my scanner, I saw a handful of U-codes (communication errors) pointing to the BCM. A common failure point on these trucks is a poor ground connection, but after verifying the grounds were clean and tight, it was clear the BCM itself was failing internally. Installing a VIN-programmed Sierra Denali Body Control Module like this one resolved all the issues in under 15 minutes, saving the customer hundreds compared to dealership diagnostics and programming fees.
A Straightforward Guide to Installation
Replacing the BCM is a job most DIYers can handle with basic tools. The entire process typically takes less than 15 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the Module: On most GM trucks and SUVs from this era, the BCM is located under the driver’s side of the dashboard, usually to the left of the steering column. You may need to remove a lower dash panel for access.
- Swap the Part: The BCM is held in place by retaining clips or a few small bolts. Carefully disconnect the electrical connectors (they have locking tabs you’ll need to press) and remove the old module. Install the new module in its place and securely reconnect all connectors.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, wipers, windows, locks, and HVAC. While our VIN programming handles most functions, if the airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key’ procedure.
Verified Vehicle Compatibility List
This module is a direct replacement for a wide range of 2007-2013 General Motors trucks and SUVs. It is interchangeable with part numbers 25835966, 15943678, 20939137, 22860591, and others. Please verify your part number or contact us to ensure compatibility.
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-13
SIERRA 3500 PICKUP 07-13
SIERRA DENALI 1500/2500/3500 07-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-13
SILVERADO 3500 PICKUP 07-13
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 07-11
Frequently Asked Questions
Does this Body Control Module require programming at the dealership?
No. We pre-program this module to your vehicle’s VIN before shipping. It arrives ready for a straightforward installation, saving you time and money.
What is a core charge?
There is no core charge for this part. You are not required to send your old, faulty module back to us, which simplifies the process for you.
My airbag light is on. Will this fix it?
A failing BCM can cause the airbag light to illuminate with code B1001. While this module will fix the root cause, you may need a professional scan tool to perform an ‘SDM Key Sync’ procedure after installation to clear the light.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part, tested for reliability and backed by our one-year warranty to ensure dependable performance.
Where is the BCM located on my 2013 Sierra Denali 3500?
The Sierra Denali Body Control Module is typically found under the driver-side dashboard, to the left of the steering column. Access is usually gained by removing the lower dash cover.