2007-2010 Sierra Denali BCM Body Control Module 25844480 Programmed

Restore Full Electrical Function to Your GM Truck or SUV

Are you battling frustrating electrical gremlins in your GMC Sierra, Chevrolet Silverado, or Tahoe? A faulty Body Control Module (BCM) is often the culprit behind a host of perplexing issues, from flickering lights and unresponsive power windows to a dead HVAC system. This genuine OEM-quality GM BCM, part number 25844480, is the definitive solution. It arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation.

Is a Failing BCM Causing Your Problems?

The BCM is the central command center for your vehicle’s body electronics. When it begins to fail, it can trigger a wide array of symptoms that may seem unrelated. If you’re experiencing any of the following, a new BCM is likely the fix you need.

• ✔ Unresponsive or erratic power windows, door locks, or interior/exterior lights.
• ✔ HVAC system failures, including an inoperative blower motor or inability to control temperature.
• ✔ An illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
• ✔ Security system malfunctions, causing no-start conditions, stalling, or random alarm activation.
• ✔ A dashboard lit up with various warning lights and error messages.
• ✔ Communication errors with other vehicle modules, leading to a host of DTCs.

Why Choose Our Pre-Programmed 2007-2010 Sierra Denali BCM?

Ordering a replacement BCM from us is the fastest and most reliable way to get your truck back to 100%. Unlike modules from a salvage yard or a generic part from a local store, our BCMs are meticulously prepared for your specific vehicle. We load the latest GM software and program the unit with your VIN before it ships. This means the module is ready for installation right out of the box, restoring all original functions without any additional setup. This service is essential for proper communication between the BCM, the engine computer, and other critical systems. This unit is a direct replacement for a wide range of part numbers, including 15878753, 25835966, 15943678, and 20939137.

Installation and Post-Install Notes

Replacing the BCM is a straightforward process for any DIYer with basic tools. The module is typically located under the driver’s side dashboard, near the steering column. The physical swap takes only a few minutes. In most cases, no further action is needed. However, please note that on some vehicles, if the airbag light remains on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ function. This syncs the new BCM with the airbag system. Additionally, a Brake Pedal Position Relearn may be necessary on certain models. Best of all, there is no core charge, so you don’t have to worry about the cost or hassle of sending your old part back.