Is Your GM Van Plagued by Baffling Electrical Problems?
If you’re dealing with flickering lights, malfunctioning power windows or locks, or a security system that has a mind of its own, the culprit is often a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics. When it begins to fail, it can cause a cascade of frustrating and seemingly unrelated issues, making your reliable workhorse feel unpredictable. Don’t let a faulty module disrupt your work or daily life. This pre-programmed BCM is the definitive solution to restore full functionality and peace of mind to your vehicle.
From the Diagnostic Bay
We once had a 2011 Express van in the shop with a classic “ghost” problem. The owner complained that the battery would be dead every few days for no apparent reason. We checked for parasitic draws and found an intermittent spike from the interior lighting circuit. After hours of tracing wires and checking switches, we hooked up a scope to the BCM’s output for that circuit. Sure enough, even with the doors closed and the van off, the BCM was randomly commanding the dome lights on for minutes at a time. A new, properly programmed BCM solved the issue permanently. These failures can be incredibly subtle and frustrating to diagnose without seeing them firsthand.
Symptoms of a Failing Body Control Module
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights staying on, flickering, or not turning on.
- ✔ The security system or keyless entry failing to work correctly.
- ✔ Dashboard warning lights appearing for no reason.
- ✔ Communication errors with other modules when scanned with a diagnostic tool.
- ✔ Intermittent no-start conditions where the starter won’t engage.
- ✔ Horn honking unexpectedly or not working when pressed.
Your Plug-and-Play Savana 3500 Body Control Module Solution
Replacing a BCM used to mean a costly trip to the dealership for installation and programming. We’ve eliminated that hassle. This module is not just a replacement part; it’s a complete, ready-to-install solution. When you order, simply provide us with your vehicle’s VIN. Our technicians will then program the module with the latest GM factory software specific to your van’s configuration. This ensures that all the original features your vehicle came with will function correctly right out of the box. It arrives at your door, ready for a straightforward installation.
Important Installation Notes
While this module is designed for a simple installation, some vehicles may require additional steps, known as relearn procedures, for certain systems to sync with the new BCM. Please be aware of the following potential requirements:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary. This requires a professional-grade scan tool to sync the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure proper operation of the brake lights and traction control system.
Always consult a factory service manual or a qualified technician if you are unsure about any part of the installation process.
Broad Compatibility Beyond the Savana
This BCM is a direct replacement for a wide range of GM trucks, vans, and SUVs, covering numerous part numbers including 20815898, 15872388, 20935349, 22860591, and 25892622 among many others. Please verify your original part number against the comprehensive list provided in our fitment data to ensure perfect compatibility.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready to install, saving you time and money.
What does the Body Control Module actually do?
The BCM is a computer that controls and monitors many of your vehicle’s non-engine-related functions. This includes power windows, power locks, interior and exterior lighting, the security system, wipers, and various other comfort and convenience features.
Where is the BCM located on a 2008-2012 Savana or Express van?
On most GM vans of this era, the BCM is typically located in the center dash area, often behind the glove box or integrated into the fuse panel assembly. Always consult a service manual for the exact location on your specific model before beginning work.
Is there a core charge for this part?
No, there is no core charge. You can keep your old module without needing to send it back to us.
Will this fix my specific electrical problem?
This module is a direct solution for failures within the BCM itself. If your vehicle is exhibiting multiple symptoms from the list above, a faulty BCM is the most likely cause. However, we always recommend a proper diagnosis to rule out wiring, switch, or sensor issues before replacing any module.