Are you experiencing bizarre electrical problems with your 2004-2007 Chevrolet Express or GMC Savana van? Issues like flickering lights, malfunctioning power windows, a dead HVAC blower, or a security system that won’t cooperate are classic signs of a failing Body Control Module (BCM). This central computer is the brain for your van’s body electronics, and when it fails, it can cause a cascade of frustrating and hard-to-diagnose issues. Restore full functionality and reliability with this direct-fit, VIN-programmed Body Control Module, compatible with part numbers 15064149 and 15116066.
We had a 2006 Express 3500 work van come into the shop that was driving the owner crazy. The radio would turn on and off by itself, the dome lights wouldn’t work, and the power door locks were completely unresponsive. He had already replaced the battery and checked all the fuses. After connecting our scanner, we saw multiple communication loss codes pointing to the BCM. Instead of a costly trip to the dealer for a new module and programming, we installed one of our pre-programmed units. In under 10 minutes, every single electrical issue was resolved. The van was back on the road, and the owner was thrilled to have his reliable workhorse back.
Symptoms of a Failing Express 3500 BCM
- ✔ Intermittent or non-working interior and exterior lights.
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ HVAC controls are unresponsive, or the blower motor works only on certain speeds.
- ✔ The security system acts up, causing no-start conditions or false alarms.
- ✔ Airbag warning light illumination, often with DTCs like B1001.
- ✔ Unpredictable behavior from windshield wipers.
- ✔ Multiple communication-related Diagnostic Trouble Codes (DTCs).
The Plug-and-Play Solution for Your Van
The biggest challenge when replacing a BCM is the required programming. Dealerships charge a premium for this service, adding time and expense to your repair. Our modules eliminate this step entirely. We pre-program this Express 3500 BCM to your vehicle’s specific VIN before shipping. This ensures that all your van’s original features and functions work correctly right out of the box. There’s no need for expensive scan tools or a trip to the dealer—simply install the module, and you’re ready to go. This process also ensures the latest GM software updates are applied for optimal performance and longevity.
After installation, some vehicles may require a simple relearn procedure. For example, if your airbag light remains on, a technician may need to perform a ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool. Similarly, a Brake Pedal Position Relearn might be necessary. These are minor steps that ensure all related systems communicate properly with the new BCM.
Frequently Asked Questions
What does a Body Control Module do on a Chevy Express van?
The BCM acts as the central hub for your van’s body electronics. It controls non-engine related functions like power windows, door locks, the security system, interior/exterior lighting, wipers, and the HVAC system.
Is this BCM difficult to install?
No, installation is very straightforward for most DIYers. The BCM is typically located in the center dash area. The process usually takes less than 15 minutes and only requires basic hand tools. Remember to disconnect the battery before starting.
Do I need to take my van to the dealer after installing this part?
No. This module comes pre-programmed to your vehicle’s VIN, which eliminates the need for dealership programming. This saves you time and money, making it a true plug-and-play solution.
What happens if I don’t provide my VIN when ordering?
Providing your VIN is essential for the programming service. Without it, we cannot program the module to match your vehicle’s specific configuration, and it will not function correctly. Please be sure to enter your VIN at checkout.
Will this fix my airbag light?
A faulty BCM can cause the airbag light to come on. Replacing it often resolves the issue. However, if the light stays on after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool may be required to sync the systems.