Restore Full Electrical Control to Your GM Vehicle
Is your 2008-2012 GMC Savana 3500 or other compatible GM vehicle suffering from strange and unpredictable electrical problems? Issues like flickering lights, malfunctioning power windows and locks, or a security system that acts up on its own are often traced back to a single component: a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of frustrating issues. This direct-fit replacement Body Control Module, part number 20839063, is the definitive solution to restore your vehicle’s functionality and peace of mind.
From the Diagnostic Bay
We recently worked on a 2011 Express 2500 work van that came in with a complaint of intermittent power door locks and a radio that wouldn’t turn off, draining the battery overnight. The owner had already replaced the battery and checked all the fuses. Diagnostics pointed to a communication error originating from the BCM. Instead of a costly trip to the dealership for a new module and programming, we installed one of our VIN-programmed units. The installation was straightforward, and upon connecting the battery, the radio, locks, and interior lights all functioned perfectly. It’s a common scenario where this single component solves a dozen different electrical gremlins.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Headlights, taillights, or interior lights that flicker, stay on, or don’t work at all.
- ✔ Malfunctioning windshield wipers or washers.
- ✔ The vehicle’s security system or keyless entry fails to operate correctly.
- ✔ False warnings on the dashboard, such as a persistent “door ajar” light.
- ✔ Unexplained battery drain when the vehicle is turned off.
- ✔ Communication errors with diagnostic scan tools.
The Plug-and-Play Solution: A Pre-Programmed Savana 3500 Body Control Module
Replacing a BCM has traditionally been a complex job requiring expensive programming tools and a trip to the dealership. We eliminate that hassle. When you order from us, you provide your vehicle’s VIN, and our technicians will program the module with the latest GM software specific to your vehicle’s configuration. This ensures that when the module arrives, it’s ready for a simple, plug-and-play installation. This process not only saves you hundreds of dollars in dealership fees but also gets your vehicle back on the road faster.
Installation and Post-Install Procedures
Physical installation typically involves locating the old BCM (often under the dash on the driver’s side or in the center console), disconnecting the battery, swapping the modules, and reconnecting the battery. While our programming handles the majority of the setup, some vehicles may require simple relearn procedures after installation:
- Airbag System Sync: In some cases, the airbag warning light may illuminate after installation. A professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the systems. This is only necessary if the light is on.
- Brake Pedal Position Relearn: A brake pedal position sensor recalibration might be required on certain models to ensure correct brake light and traction control operation.
This module is a direct replacement for a wide range of part numbers, including 15921352, 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 is a computer that acts as the central hub for your vehicle’s body electronics. It manages non-engine related functions like power windows, locks, lights, wipers, security system, and interior accessories, ensuring they all work together correctly.
Do I need to get this module programmed?
No. This module comes pre-programmed to your vehicle’s specific VIN. Simply provide us with your VIN during checkout, and we will flash the module with the correct software and latest updates from GM before shipping it to you.
What happens if I forget to provide my VIN?
We cannot ship the module without your vehicle’s VIN. The programming is essential for the part to function correctly in your vehicle. Our team will contact you after your purchase to retrieve the VIN if it was not provided.
Is this a difficult part to install myself?
For someone with moderate DIY mechanical skill, the physical replacement is straightforward. The BCM is usually located under the dashboard and is held in place by a few bolts or clips. The key benefit of our product is that the difficult programming step is already done for you.
Will this fix my specific electrical problem?
If your vehicle is exhibiting several of the symptoms listed, a failing BCM is the most likely cause. This module is designed to correct those issues. However, we always recommend proper diagnostics to confirm the BCM is the source of the problem before ordering.