Are you battling frustrating electrical issues in your GM truck or SUV? A faulty Body Control Module (BCM) is often the culprit behind problems like malfunctioning lights, erratic power windows, a dead instrument cluster, or even a vehicle that won’t start. This OEM-quality BCM, part number 15901388, is the definitive solution for restoring your vehicle’s electronic systems to factory-perfect operation. It arrives pre-programmed to your specific Vehicle Identification Number (VIN), eliminating the need for expensive dealership visits and ensuring a simple, plug-and-play installation.
We had a 2009 Silverado 2500 in the shop with a list of bizarre, intermittent symptoms. The radio would cut out, the dome light would flicker, and the driver’s power window only worked when it wanted to. The owner had already replaced the battery and checked fuses. After scanning, we found a slew of communication error codes. Instead of just swapping the BCM, we checked the main BCM ground connection under the dash. It was slightly loose and corroded. After cleaning the contact point and tightening the ground, most issues vanished, but the BCM had already suffered internal damage from the poor connection. Installing a new, VIN-programmed BCM was the final step that cleared all codes and restored 100% functionality. It’s a powerful reminder to always check your grounds during a BCM replacement.
Diagnosing a Faulty Sierra 3500 Body Control Module
The BCM is the central nervous system for your vehicle’s body electronics. When it begins to fail, it can create a chain reaction of problems that may seem unrelated. If you’re experiencing any of the issues below, a failing BCM is the likely cause. This replacement module is engineered to resolve these common failures and restore the reliability you depend on for your Sierra 3500 Body Control Module and other compatible GM vehicles.
Key Symptoms of BCM Failure
- ✔ Unresponsive or intermittently working power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or won’t turn on at all.
- ✔ Malfunctioning HVAC controls or a blower motor that works sporadically.
- ✔ An active airbag warning light, often accompanied by DTC B1001.
- ✔ Security system faults, causing no-start conditions or random alarm activation.
- ✔ Inaccurate gauge readings or a completely dead instrument cluster.
- ✔ Communication errors with other vehicle modules.
This module is a direct replacement for a wide range of GM part numbers, including 25835966, 15943678, 25844480, 20939137, and 22860591. By providing your VIN at checkout, we ensure the Sierra 3500 Body Control Module you receive has the latest GM software and is perfectly matched to your vehicle’s options for a seamless repair. No core charge is required, so you can keep your old part.
Frequently Asked Questions
Will this BCM be plug-and-play for my vehicle?
Yes! This Body Control Module is expertly programmed to your vehicle’s VIN before shipping. This ensures it works correctly with your specific options right out of the box, with no need for additional programming at a dealership.
What if the airbag light is on after I install the new BCM?
In some cases, an airbag light may persist (often with code B1001). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be performed with a professional-grade scan tool. This syncs the new BCM with your vehicle’s airbag system.
Where is the BCM located on my truck?
The BCM is typically located under the driver’s side of the dashboard, near the steering column. Installation usually takes less than 15 minutes with basic hand tools.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep or dispose of your old module without any extra fees or hassle.
How do I know this part will fit my vehicle?
This BCM fits a wide range of 2007-2013 GM trucks and SUVs, including the Sierra, Silverado, Tahoe, Yukon, Suburban, and Escalade. Please verify your part number or use the fitment chart on this page to confirm compatibility.