2013 Sierra Denali 3500 Body Control Module 15878753 Programmed To Your VIN BCM

Restore Full Control Over Your Truck’s Electronics

Are you dealing with baffling electrical issues in your GM truck? One moment the radio works, the next it’s dead. The power windows have a mind of their own, and a persistent airbag light is staring you down. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s comfort and security features, a faulty BCM can turn your reliable workhorse into a source of constant frustration. This replacement Body Control Module, equivalent to part number 15878753, is the definitive solution for your 2013 Sierra Denali 3500 BCM and other compatible GM vehicles.

We take the guesswork and dealership hassle out of the equation. Each module is professionally programmed to your vehicle’s specific VIN before it ships, ensuring it arrives ready for a true plug-and-play installation. This restores communication between critical systems and clears the persistent fault codes that a generic, unprogrammed module can’t fix.

Diagnosing the Problem: Common BCM Failure Signs

If your truck is exhibiting any of these symptoms, a failing BCM is the likely culprit. I’ve seen these issues hundreds of times in the service bay, often after a customer has already spent money replacing other parts.

• ✔ Intermittent or non-functional power windows, door locks, or interior/exterior lighting.
• ✔ HVAC system problems, such as a blower motor that won’t turn on or switches modes randomly.
• ✔ An active airbag warning light on the dash, often accompanied by Diagnostic Trouble Code (DTC) B1001.
• ✔ Vehicle security system malfunctions, leading to no-start conditions or unexpected alarm activation.
• ✔ Strange electrical behavior, like the radio turning off, gauges acting erratically, or misfires linked to poor data communication.

Your 5-Minute Installation Guide

Getting your truck back to 100% is easier than you think. No specialized tools are required for the physical swap.

1. Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
2. Locate the BCM: On most GM trucks and SUVs, the BCM is located under the driver’s side of the dashboard, often to the left of the steering column. You may need to remove a lower dash panel for access.
3. Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Unbolt or unclip the old module and secure the new, pre-programmed one in its place.
4. Reconnect & Test: Plug the connectors firmly into your new BCM. Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and the HVAC system.
5. Post-Installation Check: In some cases, an airbag light may remain on. This is normal and requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function to sync the systems. This is a simple procedure for any well-equipped shop.

Verified Vehicle Compatibility

This module is a direct-fit replacement for a wide range of GM trucks and SUVs, and is interchangeable with part numbers including 25835966, 15263363, 15263497, 15878753, 15284816, and many more. Please verify your model and year below.

Note: For 2007 models, this fits the ‘new style’ with a smooth door skin. Some 2010-2013 models may have a specific ID number (e.g., 25835966) on the original part; this module is a compatible replacement.