Is Your GM Van or SUV Plagued by Bizarre Electrical Problems?
If you’re dealing with flickering lights, malfunctioning power windows, a security system with a mind of its own, or random warning lights on your dash, the culprit is often a failing Body Control Module (BCM). The BCM acts as the central hub for your vehicle’s body electronics, coordinating everything from your interior lights and door locks to your anti-theft system. When it starts to fail, it can create a cascade of frustrating and seemingly unrelated issues, making your vehicle unreliable and difficult to operate.
From the Diagnostic Bay
We had a 2011 Express work van come into the shop that was driving the owner crazy. The dome lights would stay on intermittently, draining the battery overnight. Then, the power door locks stopped responding to the key fob. The driver thought he had multiple separate problems, but a quick scan with a diagnostic tool revealed communication faults pointing directly to the BCM. Instead of a costly and time-consuming visit to the dealer, we installed a VIN-programmed BCM like this one. The van was back on the road the same afternoon with all electrical functions restored, saving the owner significant downtime and expense.
Common Symptoms of a Failing BCM
A faulty Body Control Module can manifest in various ways. If you’re experiencing any of the following, it’s a strong indicator that your BCM needs replacement:
- ✔ Erratic or non-functional interior and exterior lights (headlights, taillights, dome lights).
- ✔ Power windows, door locks, or mirrors not working correctly or at all.
- ✔ Vehicle security system acting up, causing false alarms or preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Inaccurate readings on the instrument cluster gauges.
- ✔ Warning lights (like Airbag or ABS) illuminating on the dashboard for no apparent reason.
- ✔ Communication errors when trying to diagnose the vehicle with a scan tool.
The Plug-and-Play Solution: A Pre-Programmed Express 1500 Body Control Module
Don’t let a faulty BCM keep your vehicle off the road. This replacement Body Control Module, part number 20864768, is the definitive solution for your 2008-2012 Express 1500 Body Control Module needs and a wide range of other GM vehicles. The critical advantage of our service is that we program the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means no expensive trips to the dealership for programming. It arrives at your door ready for installation, loaded with the latest GM software updates to ensure optimal performance and compatibility.
Installation and Post-Install Notes
Replacing the BCM is a straightforward process for a knowledgeable DIYer or any professional technician. After installation, some vehicles may require simple relearn procedures to ensure all systems communicate correctly. Please be aware of the following potential requirements:
- 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 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 necessary to ensure proper brake light and traction control functionality.
Always consult a factory service manual or a qualified technician for vehicle-specific instructions.
Guaranteed Fitment for Multiple GM Models
This BCM is a direct replacement for a wide array of GM vehicles. It is compatible with the following 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
What exactly does the Body Control Module do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related electronic functions. This includes power windows, locks, lights, security system, wipers, and various other comfort and convenience features.
Do I need to have this module programmed?
No. The main benefit of our service is that we program the module for you using the VIN you provide. This makes the installation process much simpler and saves you a trip to the dealership.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship the module until we have this information to program it correctly for your specific vehicle.
What if the airbag light comes on after I install the BCM?
This is a known possibility. It simply means the new BCM needs to be electronically introduced to the airbag system (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ can be performed by a shop with a capable diagnostic tool to resolve this.
Is there a core charge for my old part?
No, there is no core charge for this part. You can keep your original module without needing to send it back.
Will this fix my specific electrical problem?
This module is a direct solution for issues caused by a faulty BCM. While the symptoms listed are common indicators, we always recommend a proper diagnosis by a qualified technician to confirm the BCM is the root cause of your problem before ordering.