End the Electrical Headaches in Your GM Vehicle
If you’re dealing with a vehicle that seems to have a mind of its own—flickering lights, malfunctioning power windows, a starter that won’t engage, or random warning chimes—the culprit is often a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated issues. For workhorse vehicles like the Savana van, this isn’t just an annoyance; it’s downtime that costs you money.
This is the reliable, straightforward solution. We offer a genuine GM Body Control Module, part number 15837419, that arrives at your door fully programmed to your vehicle’s specific VIN. We load it with the latest GM software updates, ensuring optimal performance and compatibility. This eliminates the need for expensive dealership visits for programming, allowing you to get your vehicle back in service quickly and affordably. Simply provide your VIN after purchase, and we handle the rest.
A Technician’s Notebook: The Ghost in the Work Van
I once had a 2011 Savana 3500 from a local plumbing company come into my bay. The complaint was a classic “ghost in the machine” scenario. The driver reported intermittent no-starts, the radio would sometimes not turn on, and the interior dome lights would stay on, draining the battery overnight. They had already replaced the battery and checked the alternator. After running network diagnostics, I saw multiple U-codes (communication loss) pointing to the BCM. A failing 2008-2012 Savana 3500 BCM can disrupt the entire CAN bus network, causing these exact unpredictable problems. Swapping in a VIN-programmed module solved all the issues in one shot, getting their van back on the road and earning money the next day.
Is Your GM Vehicle Showing These Electrical Gremlins?
- ✔ Power windows, locks, or mirrors working intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system preventing the vehicle from starting (theft light on).
- ✔ Inaccurate gauge readings or a dead instrument cluster.
- ✔ Communication error codes, such as U0140, U0155, or other U-codes.
- ✔ The horn honking unexpectedly or not working.
- ✔ A persistent battery drain with no other obvious cause.
Your Straightforward BCM Installation Guide
Replacing the BCM in most of these GM vehicles is a manageable job for a DIYer or any professional technician. While the exact location varies by model (see fitment list), the general process is similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning.
- Locate the BCM: On Savana/Express vans, it’s typically behind the center dash. On other models, it may be under the driver’s side dash or near the steering column.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module and remove it.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors.
- Reconnect Battery & Test: Reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, windows, locks, radio, etc.—to confirm the repair.
Important Post-Installation Note: In some cases, additional steps may be needed. If your airbag light is on, a professional scan tool is required for the “Setup SDM Primary Key in BCM” procedure. A Brake Pedal Position relearn may also be necessary on certain models to ensure proper brake light and traction control operation. Always consult a factory service manual for model-specific instructions.
Verified Compatibility Across GM Models
This BCM is a direct replacement for a wide range of GM cars, trucks, and SUVs. It replaces numerous part numbers, including 15837419, 25892622, 20815898, and many more. Please verify your vehicle is on the list below.
Frequently Asked Questions
Frequently Asked Questions
Do I need to send my old BCM back?
No. There is absolutely no core charge for this part. You can keep your old module.
Is this part difficult to install?
For someone with basic mechanical skills, it is a straightforward replacement. The main challenge is accessing the module’s location. Since it comes pre-programmed, no special computer tools are needed for the initial installation.
What information do you need to program the module?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We use this to load the correct software and settings for your specific vehicle.
Will this fix my specific problem?
This module corrects issues directly caused by a failing BCM, such as problems with lights, locks, windows, and security systems. While it solves the most common electrical issues, always ensure a proper diagnosis has been performed, as other modules or wiring could cause similar symptoms.
My airbag light came on after installation. What do I do?
This can happen on some models. It requires a ‘Setup SDM Primary Key in BCM’ procedure to be performed with a bi-directional scan tool to sync the airbag system with the new BCM. A professional mechanic or well-equipped shop can perform this for you.