Solve Persistent Electrical Problems with a Plug-and-Play BCM

If you’re tired of chasing down bizarre electrical gremlins in your GM truck or SUV, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable vehicle into a source of constant frustration. This GM 25844480 Body Control Module is the definitive solution for a wide range of issues, arriving at your door fully programmed to your vehicle’s VIN. This eliminates the need for expensive dealership visits and gets your truck back to operating as it should, quickly and affordably.

The BCM is the central command center for your vehicle’s body electronics. When it begins to fail, you’ll notice a cascade of strange symptoms—from flickering lights and a dead HVAC system to unsettling security system alerts. Our service ensures that your new 2011 Sierra Denali 2500 BCM is a true plug-and-play replacement. We flash it with the latest GM software updates specific to your VIN, ensuring seamless communication with all other modules in your vehicle right out of the box.

Is Your Truck Showing These Symptoms?

A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely culprit:

• ✔ The air conditioning or heater blower motor stops working or works sporadically.
• ✔ Your airbag warning light is illuminated, often with a Diagnostic Trouble Code (DTC) B1001 stored.
• ✔ Power windows, door locks, or interior/exterior lights fail to operate correctly.
• ✔ The security system acts up, causing no-start conditions, stalling, or random alarms.
• ✔ The instrument cluster displays erratic behavior or warning messages.
• ✔ Poor grounding issues that seem impossible to trace.

A Straightforward Guide to Installation

Getting your truck back in order is easier than you think. Most DIYers can complete this job in just a few minutes with basic tools.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
2. Locate the BCM: On most compatible GM trucks and SUVs, the BCM is located in the driver’s footwell, under the dashboard, and to the left of the steering column.
3. Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, the module can be unclipped or unbolted from its mounting bracket.
4. Install the New BCM: Snap the new, pre-programmed BCM into the mounting bracket and firmly reconnect all electrical connectors. Ensure they click securely into place.
5. Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, windows, locks, wipers, and HVAC system.
6. Post-Install Checks: In some cases, an airbag light may persist. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. A Brake Pedal Position Relearn may also be needed for certain models.

Will This Fit My Truck or SUV?

This module is a direct-fit replacement for a wide array of General Motors vehicles. It is interchangeable with part numbers 25835966, 15943678, 20939137, 22860591, and many others. Please verify your vehicle from the list below: