Is Your GM Truck Experiencing Bizarre Electrical Issues?
If your 2007-2013 GM truck or SUV is suffering from flickering lights, a non-responsive HVAC system, or random warning lights, a failing Body Control Module (BCM) is the most likely culprit. The BCM acts as the central command center for your vehicle’s body electronics, managing everything from power windows and door locks to the security system. When it malfunctions, it can create a cascade of frustrating and difficult-to-diagnose problems. This genuine quality GM BCM, interchangeable with part number 15926094, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a hassle-free, plug-and-play installation.
From the Diagnostic Bay
We had a 2013 Sierra 3500 roll in with a laundry list of complaints: the radio would cut out, the driver’s side window worked intermittently, and the airbag light was on. The owner had already replaced the window switch and checked fuses to no avail. After hooking up our scanner, we saw a network communication error and a specific DTC B1001. Instead of chasing individual components, we went straight to the source. A quick inspection of the original BCM revealed no obvious damage, but experience pointed to internal failure. We installed one of our VIN-programmed modules, performed the quick SDM key sync, and every single issue was resolved in under 15 minutes. The customer was thrilled to avoid a costly, time-consuming dealership visit.
Common Symptoms of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights staying on, flickering, or failing to turn on.
- ✔ HVAC controls are unresponsive, or the blower motor works intermittently.
- ✔ The vehicle’s security system malfunctions, causing starting issues or false alarms.
- ✔ An active airbag warning light, often with DTC B1001 stored in memory.
- ✔ Unexplained battery drain while the vehicle is parked.
Your Solution: A Pre-Programmed 2013 Sierra 3500 BCM
This module isn’t just a replacement part; it’s a complete repair solution. We take the guesswork and additional cost out of the equation by programming the module with the latest GM software updates specific to your truck’s VIN. This ensures all factory-installed options work correctly right out of the box, restoring your vehicle’s functionality to factory standards. Located conveniently under the steering column, installation is straightforward for any DIY mechanic.
Installation and Post-Install Procedures
Physical installation typically takes less than 10 minutes. However, depending on your vehicle’s configuration, a couple of simple electronic relearn procedures may be necessary. If the airbag warning light is illuminated after installation, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ function. Additionally, a ‘Brake Pedal Position Relearn’ might be needed to ensure proper brake light and stability control operation. Always consult a factory service manual for detailed instructions specific to your vehicle.
Frequently Asked Questions
What does the Body Control Module do on my Sierra?
The BCM is a computer that controls most of the non-engine related electronics in your truck, including the power windows, door locks, interior/exterior lighting, wipers, security system, and HVAC functions.
Is this module ready to install out of the box?
Yes! This module is fully programmed to your vehicle’s specific VIN before shipping. This ensures a plug-and-play installation without requiring an expensive trip to the dealership for programming.
Where is the BCM located on a 2013 GMC Sierra 3500?
The BCM is typically located under the driver’s side of the dashboard, near the steering column. It’s an accessible location that usually requires removing a lower dash panel.
My airbag light is on after installing the new BCM. What should I do?
This is a common security measure. You will need to use a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system and will turn off the light.
Do I need to return my old part?
No, there is no core charge for this part. You can keep your old module without any extra fees or hassle.