Are you battling frustrating electrical gremlins in your GMC Savana or Chevrolet Express van? Issues like malfunctioning power windows, erratic dashboard lights, or a security system that won’t cooperate are often signs of a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing and intermittent problems. This replacement Body Control Module, part number 20815898, is the definitive solution to restore your van’s functionality and reliability.
We make the repair process simple. Unlike a trip to the dealership which involves costly programming fees and vehicle downtime, our BCM comes pre-programmed to your vehicle’s specific VIN. Just provide us with your VIN after purchase, and we’ll flash the module with the latest GM software updates before it even leaves our facility. This ensures a seamless installation process, getting your work van or personal vehicle back in service with minimal hassle.
Diagnosing Your Savana 3500 Body Control Module
A failing BCM can manifest in numerous ways. If your vehicle is experiencing several of the issues below, a faulty BCM is the most likely culprit. This module is the key to restoring order to your vehicle’s electronic systems.
Common Failure Symptoms
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic or flickering interior and exterior lights.
- ✔ Malfunctioning radio or infotainment system.
- ✔ Security system faults or the engine not starting due to a security lockout.
- ✔ Warning lights on the dashboard such as the airbag or brake light.
- ✔ Inoperative remote keyless entry.
- ✔ Communication loss with other vehicle modules (DTC U-codes).
This module is a direct replacement for a wide range of original equipment part numbers, including: 10382479, 15093910, 15276271, 15299986, 15819552, 20815898, 22860591, 25892622, and many more. Please verify your part number against our extensive cross-reference list to ensure perfect compatibility.
Post-Installation Information
While this module is designed for a straightforward installation, some vehicle systems may require a relearn procedure after the BCM is replaced. This is a normal part of the repair process.
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible professional scan tool. This syncs the new BCM with your vehicle’s airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure correct brake light operation and to satisfy the traction control system.
There is no core charge for this part. You can keep your old module, saving you the time and expense of a core return.
Frequently Asked Questions
Do I need to program this BCM?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the correct software for your specific vehicle before shipping.
Where is the BCM located on my 2008-2012 Savana 3500 Van?
On most Savana and Express vans of this generation, the Body Control Module is located behind the center dash area, often accessible after removing some lower dash panels. Always consult a service manual for the exact location on your vehicle.
What happens if my airbag light is on after I install the BCM?
This is a common occurrence. It means the new BCM needs to be electronically ‘introduced’ to the airbag’s Sensing and Diagnostic Module (SDM). A ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool will resolve this and turn off the light.
Will this fix all of my van’s electrical problems?
This module will correct any issues directly caused by a failing BCM. While the BCM is a very common point of failure for the symptoms listed, it’s always recommended to perform a proper diagnosis to rule out other potential causes like wiring or sensor faults.
Is this a brand new part?
This is a high-quality, fully tested replacement part that meets or exceeds original equipment specifications. It is guaranteed to restore your vehicle’s function and is backed by our warranty.
How long does the process take?
Once you place your order and provide your VIN, we typically program and ship the module within one business day. This gets you the part you need quickly to minimize your vehicle’s downtime.