Restore Full Electrical Function to Your GM Vehicle
Are you battling frustrating electrical gremlins in your 2008-2012 Express 2500 or other GM vehicle? Intermittent power windows, flickering lights, a malfunctioning key fob, or a security system that won’t cooperate are all classic signs of a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing and disruptive problems. This direct-fit replacement BCM, part number 20935349, is the definitive solution to restore your vehicle’s functionality and your peace of mind.
From the Diagnostic Bay
I once had a 2010 Savana van (which uses this exact BCM) with the strangest issue: the radio would turn on by itself, and the dome lights would flicker randomly at night, draining the battery. The owner had already replaced the battery and checked all the grounds. After hooking up the scan tool, I saw a flood of U-codes (communication errors) all pointing back to the BCM. A new, programmed module fixed everything instantly. It’s amazing how one faulty component can cause so much electronic chaos.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior (lights staying on or not turning on).
- ✔ Malfunctioning dashboard gauges or warning lights appearing without reason.
- ✔ Key fob not working or the security system acting up, preventing the vehicle from starting.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ A flood of communication error codes (U-codes) when scanned.
- ✔ Wipers operating incorrectly or not parking in the correct position.
Why Our Pre-Programmed 2008-2012 Express 2500 BCM is the Superior Solution
Replacing a BCM isn’t just a matter of swapping parts. A new module from a dealership requires expensive programming with specialized tools to make it communicate with your vehicle’s specific systems. We eliminate that costly and time-consuming step. When you order from us, we flash the module with the latest GM software updates and program it specifically to your vehicle’s VIN before it ships. This ensures a much simpler installation process, getting you back on the road faster. This module is a direct replacement for a wide range of part numbers, including 15828601, 20815898, 22860591, 25892622, and many more, ensuring broad compatibility.
Installation and Setup
While our programming service makes installation much easier, some vehicles may require minor post-installation procedures. These are simple ‘relearn’ or ‘sync’ functions that can often be completed with a professional-grade scan tool. Please be aware of the following potential steps:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor recalibration might be required.
There is no core charge for this part. You can keep your original module without the hassle of returning it.
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM is a computer that manages and controls many of the non-engine-related electronic functions in your vehicle. This includes power windows, door locks, interior and exterior lighting, the security system, wipers, and dashboard warning lights. It’s the brain behind your vehicle’s creature comforts and security.
Why does this BCM need to be programmed to my VIN?
Programming the BCM to your Vehicle Identification Number (VIN) is critical. It loads the correct software and vehicle-specific options (like power seats, keyless entry, etc.) into the module. This ensures it communicates correctly with all the other computers in your vehicle, preventing compatibility issues and error codes.
Is this a plug-and-play installation?
Because we program it to your VIN, it is as close to plug-and-play as possible and eliminates the need for dealership programming. However, as noted, some vehicles may require additional relearn procedures for systems like the airbags or brake pedal sensor, which typically require a diagnostic scan tool.
What happens if my airbag light is on after installation?
An airbag light after a BCM replacement is common. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A technician with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Do I need to send my old BCM back?
No. This part has no core charge. You can keep, recycle, or dispose of your old module at your convenience without any additional fees or hassle.