Restore Full Electrical Function to Your GM Truck or SUV
Are you battling a frustrating array of electrical gremlins in your Chevrolet Silverado, GMC Sierra, or Cadillac Escalade? Intermittent power windows, a malfunctioning climate control system, or a persistent airbag light can often be traced back to a single component: a failing Body Control Module (BCM). This vital electronic unit acts as the central hub for your vehicle’s body electronics. When it malfunctions, it can create a cascade of seemingly unrelated problems. This replacement BCM, equivalent to GM part number 15284816, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay
We had a 2009 GMC Sierra 2500 in the shop that was driving the owner crazy. The radio would randomly shut off, the dome lights would flicker, and the power locks worked only when they wanted to. The owner had already replaced the battery and checked the alternator. After hooking up our diagnostic scanner, we saw several communication error codes pointing toward the BCM. Instead of a complex and expensive wiring chase, we installed a VIN-programmed BCM. In under 10 minutes, every single one of the truck’s electrical issues was gone. It’s a perfect example of how this single module can restore sanity to your vehicle’s complex systems.
Common Symptoms of a Failing BCM
- ✔ Unresponsive or erratic power windows, door locks, and interior/exterior lights.
- ✔ HVAC and climate control systems that blow air at the wrong temperature or not at all.
- ✔ An illuminated airbag warning light, often accompanied by DTC B1001.
- ✔ Malfunctions with the vehicle’s security system, leading to no-start conditions.
- ✔ Erratic windshield wiper operation or failure to turn off.
- ✔ A variety of communication-related Diagnostic Trouble Codes (DTCs) stored in the system.
Your Guide to the 2007-2011 GM BCM
Diagnosing a faulty Body Control Module on these GM trucks and SUVs requires a systematic approach. Before condemning the BCM, it’s wise to first check the basics: ensure the battery is fully charged and that all main power and ground connections are clean and tight. A poor ground is a common culprit for strange electrical behavior. Next, inspect fuses related to the BCM and the circuits it controls. If these checks pass, a professional-grade scan tool can be used to communicate directly with the module and check for specific BCM-related trouble codes. A lack of communication with the BCM is a strong indicator of its failure. Replacing it with our VIN-programmed unit eliminates the guesswork and the need for expensive dealership programming.
Key Features & Benefits
- ✔ VIN Programmed for Your Vehicle: Simply provide your VIN at checkout, and we’ll program the module with the latest GM software. This ensures it works seamlessly with your vehicle’s existing systems right out of the box.
- ✔ No Dealership Visit Required: Save hundreds of dollars and valuable time by avoiding the dealership’s programming fees and scheduling hassles.
- ✔ Restores Full Functionality: Get your power accessories, security system, and other essential body functions working reliably again.
- ✔ Simple Installation: The BCM is typically located under the driver’s side dash and can be swapped out in minutes with basic hand tools.
- ✔ No Core Charge: Keep your old part without any additional fees or the inconvenience of returning a core.
Installation & Post-Install Notes
Physically installing the BCM is straightforward. It is located under the steering column and is held in place by a few clips or bolts. Disconnect the negative battery terminal before you begin. After swapping the module, reconnect the battery. In many cases, no further action is needed. However, please be aware of two potential post-installation procedures:
- Airbag System Sync: If the airbag light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed using a professional scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure correct brake light and traction control operation.
This module is a direct replacement for multiple part numbers, including: 25844480, 25835966, 15263363, 15263497, 15878753, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
What does the Body Control Module do on my 2008 Silverado?
The BCM acts as the central computer for your truck’s body electronics. It controls functions like power windows, door locks, interior and exterior lighting, the security system, wipers, and the HVAC system.
Is this BCM ready to install right out of the box?
Yes. We pre-program the module to your vehicle’s VIN before shipping. This makes the installation plug-and-play, with no need for additional dealership programming.
Why is my airbag light on after installing the new BCM?
This is a normal security measure. The new BCM needs to be electronically ‘introduced’ to the airbag system’s Sensing and Diagnostic Module (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure.
Do I need to send my old part back?
No. There is no core charge for this part. You can keep or dispose of your old module without any hassle.
Where is the BCM located on a 2010 GMC Sierra?
The BCM is located in the same place for most compatible models: under the driver’s side dashboard, near the steering column.