Is Your GM Truck or Van Plagued by Electrical Gremlins?
If you’re dealing with a frustrating mix of electrical issues in your 2004-2007 GMC Savana, Chevrolet Express, or other GM vehicle, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central command center for your vehicle’s body electronics. When it starts to fail, it can cause a cascade of seemingly unrelated problems, from flickering lights and non-working power windows to a vehicle that won’t start at all. This genuine GM BCM, part number 15116066, is the definitive solution to restore your vehicle’s full functionality and reliability.
From the Diagnostic Bay
We had a 2006 Silverado 2500 in the shop that was driving its owner crazy. The radio would cut out, the driver’s side power window worked intermittently, and the HVAC blower motor would randomly stop. The owner had already replaced the window switch and the blower motor resistor with no luck. After connecting our scanner, we saw multiple communication loss codes pointing to the BCM. Instead of chasing individual components, we installed a VIN-programmed 15116066 BCM. In under 10 minutes, every single issue was resolved. It’s a classic case of the BCM being the root cause of multiple electrical faults.
Symptoms of a Failing BCM
- ✔ Unresponsive or erratic power windows, door locks, or interior/exterior lights.
- ✔ HVAC system failures, such as a blower motor that won’t turn on or is stuck on one speed.
- ✔ An illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Security system malfunctions, including issues with the key fob or a no-start condition where the engine cranks but won’t fire.
- ✔ Intermittent operation of windshield wipers or other accessory systems.
- ✔ A battery that drains overnight due to the BCM not properly shutting down circuits.
The Direct-Fit Solution for Your 2004-2007 Savana BCM
Don’t settle for a generic module that requires expensive dealership programming. We take the hassle out of the repair by pre-programming this BCM to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that all factory settings and vehicle options are correctly configured for your exact build. It arrives at your door ready for a simple, plug-and-play installation, saving you time, money, and a trip to the dealer. Built to strict OEM standards, this module is a reliable, long-term fix for your vehicle’s electrical system.
Installation and Post-Install Considerations
Installation is straightforward for the DIY mechanic. On Savana and Express vans, the BCM is typically located in the center of the dash. On trucks and SUVs like the Silverado, Sierra, and Tahoe, it’s found under the steering column. Always disconnect the vehicle’s battery before swapping the module.
Post-Installation Procedures: In some cases, additional steps may be needed.
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and stability control function.
This module is a direct replacement for part numbers: 10383536, 15116066, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, and 15194170.
Frequently Asked Questions
What does a Body Control Module do?
The BCM acts as the central computer for your vehicle’s non-engine related functions. It controls power windows, locks, lights, wipers, the security system, HVAC, and more, ensuring all these components work together correctly.
Is this BCM really plug-and-play?
Yes. We program the module to your vehicle’s VIN before shipping. This means it arrives ready to be installed without any additional programming required for its primary functions to work.
What happens if the airbag light stays on after installation?
This is a normal security feature. The new BCM needs to be electronically ‘introduced’ to the airbag system. A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key’ procedure in a few minutes to resolve this.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your old module, which saves you the hassle and cost of return shipping.
How do I know this is the correct part for my vehicle?
You can verify the fitment by matching the part number 15116066 (or one of the interchangeable numbers listed) to your old module. You can also use our website’s vehicle selector or contact our support team with your VIN for guaranteed fitment.