Is your GMC Savana or Express van experiencing bizarre electrical problems?
If you’re dealing with flickering lights, malfunctioning power windows and locks, or a security system that has a mind of its own, the culprit is likely a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics. When it starts to fail, it can cause a cascade of frustrating and seemingly unrelated issues. This replacement BCM, part number 20864767, is the definitive solution to restore full functionality to your vehicle.
From the Diagnostic Bay
We had a 2011 Savana 3500 work van come in that was a complete electrical nightmare. The driver reported the dome lights would stay on, the radio would randomly shut off, and worst of all, it would occasionally refuse to start, displaying a ‘Service Theft System’ message. After hours of chasing wires, we isolated the issue to an internally shorted BCM. Instead of a costly trip to the dealer for a new module and programming fees, the owner opted for one of our pre-programmed units. We installed it, performed a quick security relearn, and the van was back in service the same day, saving the business significant downtime and expense.
Common Symptoms of a Failing BCM
- ✔ Erratic power window and door lock operation.
- ✔ Interior or exterior lights staying on or not turning on at all.
- ✔ The security or anti-theft system preventing the engine from starting.
- ✔ Dashboard warning lights appearing for no reason.
- ✔ HVAC (A/C and heat) controls not responding.
- ✔ Horn honking unexpectedly or not working.
- ✔ Inconsistent windshield wiper operation.
Why Choose Our Programmed 2008-2012 Savana 3500 BCM?
Getting your van back to perfect working order shouldn’t be a hassle. This isn’t just a part; it’s a complete, ready-to-install solution. We take the complexity out of the repair by programming the module specifically for your vehicle using your VIN. This ensures that all the factory-intended options and security features work correctly right out of the box. Simply provide us with your vehicle’s VIN after your purchase, and we’ll handle the rest, loading the latest GM software updates before it ships. This eliminates the need for expensive dealership programming tools or additional labor costs.
Installation and Post-Install Notes
While installation is straightforward for many, please be aware of potential post-installation procedures. Depending on your vehicle’s specific configuration, some systems may need to be re-synced with the new BCM.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool to sync the modules.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor might be necessary to ensure correct brake light and traction control functionality.
This BCM is a direct replacement for a wide range of GM part numbers, including: 15819552, 15921352, 20815898, 20864767, 22860591, 25892622, and many more. Please verify your original part number to ensure compatibility.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM acts as the main computer for your vehicle’s electronic accessories. It controls functions like power windows, locks, interior lighting, the security system, wipers, and HVAC blower speeds.
Do I need to have this BCM programmed by a dealer?
No! That’s the primary benefit of our service. We program the module to your vehicle’s specific VIN before we ship it to you. It arrives ready for installation, saving you time and money.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). You can find it on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
What if my airbag light is on after I install the new BCM?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A qualified technician with a professional-grade scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is this a simple plug-and-play installation?
For the most part, yes. You disconnect the old module and connect the new one. However, as noted, some vehicles may require additional relearn procedures for systems like the airbag or brake pedal position sensor to function correctly.
Is there a core charge for my old part?
No, there is no core charge. You can keep your original module.