Is Your GM Truck or Van Experiencing Bizarre Electrical Issues?
If your Chevy Express, Silverado, GMC Savana, or Sierra is acting possessed—with flickering lights, malfunctioning power accessories, or a security system that has a mind of its own—a failing Body Control Module (BCM) is the likely culprit. The BCM is the central command center for your vehicle’s body electronics, managing everything from the interior lights and power locks to the horn and anti-theft system. When it fails, it can cause a cascade of frustrating and seemingly unrelated problems.
From the Diagnostic Bay
We had a 2005 Silverado 2500 in the shop that was driving its owner crazy. The radio would turn on by itself, the dome light would stay on, and occasionally, the truck just wouldn’t start. The owner had already replaced the battery and checked all the fuses. After connecting our scan tool, we saw multiple communication error codes pointing to the BCM. Instead of a costly trip to the dealer for a new module and programming, we installed one of our VIN-programmed units. The electrical gremlins vanished instantly, and the truck was back on the road the same day. This is the simple, effective solution we offer you.
Symptoms of a Failing BCM
- ✔ Power windows, mirrors, or door locks working intermittently or not at all.
- ✔ Interior or exterior lights (headlights, taillights, dome light) behaving erratically.
- ✔ The security or anti-theft light is illuminated, preventing the vehicle from starting.
- ✔ The horn honking randomly or the alarm going off without reason.
- ✔ Wipers turning on by themselves or not working when you need them.
- ✔ “Service Vehicle Soon” or other warning messages on the instrument cluster.
The Direct-Fit, Programmed Solution
Don’t let a faulty module keep your vehicle sidelined. This is a direct-fit replacement 2003-2007 Express 2500 BCM, also compatible with a wide range of other GM trucks and vans. The biggest advantage? We program it for you before it ships. Simply provide your vehicle’s VIN during checkout, and we’ll flash the module with the latest GM software specific to your vehicle’s options. This eliminates the need for expensive dealership programming, making the repair process faster and more affordable.
This module is a direct replacement for the following part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689.
Important Post-Installation Information
While this 2003-2007 Express 2500 BCM is designed for a straightforward installation, some vehicles may require additional steps to ensure all systems function correctly. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. 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 operation.
Always consult a factory service manual or a qualified technician if you are unsure about any part of the installation process.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls and monitors a wide range of electronic accessories not related to the engine, such as power windows, locks, lights, wipers, and the security system.
Do I need to get this module programmed?
No. We handle the programming for you. Simply provide us with your vehicle’s 17-digit VIN when you order, and we will flash the module with the correct software for your specific vehicle before we ship it.
Is this a plug-and-play installation?
For most vehicles, it is. You disconnect the battery, swap the old module with this new one, and reconnect the battery. However, as noted, some vehicles may require an airbag sync or brake pedal relearn procedure with a professional scan tool.
What happens if my airbag light is on after installation?
This indicates the new BCM needs to be electronically introduced to the airbag system (SDM). A qualified mechanic with a high-level diagnostic tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
How do I know if this BCM will fit my vehicle?
This BCM fits a wide range of 2003-2007 GM trucks and vans. Please check the extensive fitment list on this page and verify that your original module’s part number is listed as a compatible number (e.g., 15747545, 15167329, etc.).