Restore Full Electrical Function to Your GM Truck or SUV
Is your truck experiencing bizarre electrical issues like flickering lights, unresponsive power windows, or a malfunctioning security system? These frustrating problems often point to a single culprit: a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it fails, it can create a cascade of confusing symptoms. This genuine GM Body Control Module, interchangeable with part number 15943678, is the definitive solution for restoring order and reliability to your vehicle.
Specifically designed for a wide range of 2007-2013 GM vehicles including the Chevrolet Silverado, GMC Sierra, Tahoe, and Escalade, this module arrives pre-programmed to your vehicle’s specific VIN. This crucial step ensures seamless integration with your existing systems, eliminating the need for expensive dealership programming and getting you back on the road faster.
We had a 2011 Silverado 2500 in the shop that was driving the owner crazy. The radio would cut out, the dome light would stay on, and the power locks worked intermittently. He had already replaced the battery and checked fuses with no luck. After plugging in our scanner, we saw multiple communication loss codes with the BCM. Upon inspection under the dash, we found the BCM’s main ground wire had minor corrosion. While the module itself was still functioning, the poor ground was causing the erratic behavior. We replaced the module with a pre-programmed unit and cleaned the grounding point thoroughly. It’s a critical reminder: always check your grounds when replacing a BCM to ensure a lasting repair.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ HVAC controls that are unresponsive or a blower motor that won’t turn on.
- ✔ An illuminated airbag warning light, often with DTC B1001.
- ✔ Security system malfunctions, including random alarm activation or no-start conditions.
- ✔ Exterior or interior lights that stay on, won’t turn on, or flicker randomly.
- ✔ Erratic windshield wiper operation.
- ✔ A host of communication-related Diagnostic Trouble Codes (DTCs).
Your Direct-Fit 2013 Sierra BCM Solution
Don’t let electrical gremlins sideline your truck. This VIN-programmed BCM is the most effective way to solve these issues permanently. By providing us with your VIN during checkout, our technicians will flash the module with the latest GM software specific to your vehicle’s configuration. This ensures that all factory-installed options work correctly right out of the box. This is not just a replacement part; it’s a complete, ready-to-install solution for your 2013 Sierra BCM and other compatible models.
Installation and Post-Install Procedures
Installation is typically a straightforward process. The BCM is located under the driver’s side dashboard, near the steering column. In most cases, it’s a simple swap. However, please be aware of two potential post-installation procedures:
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. 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 proper brake light and traction control operation.
Frequently Asked Questions
What does ‘VIN Programmed’ mean?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and factory software onto the module before shipping it. This makes the module plug-and-play, as it’s already configured for your truck’s exact features, avoiding a costly trip to the dealership.
Is this BCM difficult to install?
For someone with basic mechanical skills, the installation is relatively simple and usually takes less than 15 minutes. It’s typically located under the driver’s side dash and involves disconnecting the battery and swapping a few electrical connectors.
What if my airbag light is on after I install the new BCM?
This is a common security feature. The new BCM needs to be electronically introduced to the airbag system (SDM). This requires a professional-grade scan tool with the ability to perform the ‘Setup SDM Primary Key in BCM’ procedure. Many independent repair shops can perform this service.
How do I know if this part number will fit my vehicle?
This module is a direct replacement for a wide range of GM trucks and SUVs from 2007-2013. It interchanges with numerous part numbers, including 25844480, 25835966, 15926094, and 22860591. Please check the fitment list on this page or contact us with your VIN to confirm compatibility.
Do I need to send my old BCM back?
No, there is no core charge for this module. You can keep your old part without any hassle or extra fees.