Restore Full Electrical Function to Your GM Vehicle
Is your 2008-2012 GMC Savana 3500 or other compatible GM vehicle suffering from bizarre electrical issues? Problems like flickering lights, malfunctioning power windows and locks, an unresponsive instrument cluster, or even a no-start condition often point to a single culprit: a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it malfunctions, it can create a cascade of frustrating and seemingly unrelated problems. This replacement Body Control Module, part number 20864768, is the definitive solution to restore your vehicle’s proper operation and reliability.
The Plug-and-Play Solution: Programmed to Your VIN
Replacing a BCM isn’t as simple as swapping the old part for a new one. These modules are vehicle-specific and must be programmed with your vehicle’s unique information to function correctly. Our service eliminates the need for an expensive trip to the dealership for programming. Simply provide us with your vehicle’s VIN (Vehicle Identification Number) during checkout, and our technicians will flash this module with the latest GM software updates specific to your van. This ensures that when the module arrives, it’s ready for a direct, plug-and-play installation, restoring all factory settings and functions seamlessly.
From the Diagnostic Bay
We had a contractor’s 2011 Savana 3500 work van come into the shop with a list of strange symptoms. The dome lights would stay on, the driver’s side power window worked intermittently, and the security light would flash, occasionally preventing the van from starting. The owner had already replaced the battery and checked fuses with no luck. After connecting our diagnostic tool, we saw multiple communication errors pointing towards the BCM. Instead of a costly new unit from the dealer, we installed one of our VIN-programmed modules. The installation was straightforward, and upon startup, every single electrical gremlin was gone. The van was back on the road, earning money for its owner the very same day.
Common Symptoms of a Failing Savana 3500 Body Control Module
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not turning on at all.
- ✔ The security system light is illuminated on the dash, possibly causing a no-start condition.
- ✔ The horn honking unexpectedly or not working when prompted.
- ✔ Instrument cluster gauges behaving erratically or going dark.
- ✔ False warning messages appearing on the driver information center.
- ✔ Rapid battery drain while the vehicle is parked.
Installation and Post-Install Procedures
After receiving your pre-programmed module, the physical installation is typically a straightforward process. The BCM is often located under the dash on the driver’s side. Disconnect the negative battery terminal before you begin. Carefully unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Reconnect the connectors and the battery.
In some cases, additional steps known as ‘relearn’ procedures may be necessary to fully sync the new BCM with other modules in your vehicle:
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure the brake lights and traction control systems function correctly.
This module is a direct replacement for a wide range of part numbers, ensuring broad compatibility. Please verify your original part number against the list below:
Compatible Part Numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. We handle all the programming for you before shipment. Just provide your vehicle’s VIN when you order, and the module will arrive ready for installation.
What is a core charge? Do I need to send my old part back?
There is no core charge for this part. You can keep your original module without any additional fees or hassle.
Where is the BCM located on my 2010 GMC Savana 3500?
On most Savana and Express vans of this generation, the Body Control Module is located in the center dash area, often accessible after removing some lower dash panels.
What happens if my airbag light is on after I install the new BCM?
This indicates that the new BCM needs to be electronically synced with your vehicle’s airbag module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which must be performed by a technician with a professional-grade diagnostic scan tool.
How do I provide my VIN for programming?
You can add your VIN in the notes section during checkout or send it to us in a message after you complete your purchase. We cannot ship the module until we have your VIN to ensure correct programming.