Is your Silverado, Sierra, or Tahoe plagued by frustrating electrical problems?
If you’re dealing with flickering lights, unresponsive power windows, a malfunctioning security system, or strange HVAC behavior, a failing Body Control Module (BCM) is the likely culprit. The BCM is the central command center for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of confusing and intermittent issues. This genuine OEM-quality GM BCM, part number 15116066, is the definitive solution to restore your vehicle’s electronic systems to perfect working order.
From the Diagnostic Bay
We had a 2005 GMC Sierra 2500 in the shop where the owner had already replaced the blower motor and resistor twice, but the HVAC fan would still cut out randomly. He was convinced the truck was cursed. After a quick scan, we saw communication fault codes pointing to the BCM. Instead of throwing more parts at it, we installed a VIN-programmed BCM. The HVAC worked perfectly, and we also fixed an intermittent power lock issue he hadn’t even mentioned. It’s a classic case of the BCM being the hidden source of multiple electrical gremlins.
Symptoms of a Failing GM Body Control Module
- ✔ Unresponsive or erratic power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that won’t turn on or off, or that flicker randomly.
- ✔ HVAC and climate control systems that operate intermittently or not at all.
- ✔ An active airbag warning light, often accompanied by DTC B1001.
- ✔ Security system malfunctions, causing no-start conditions or false alarms.
- ✔ Wipers that behave erratically or fail to operate.
- ✔ A variety of seemingly unrelated diagnostic trouble codes (DTCs).
The Plug-and-Play Solution: A Programmed 2003-2007 Silverado BCM
Don’t waste time and money on a trip to the dealership. We simplify the repair process by pre-programming this module to your vehicle’s specific VIN. This ensures that when the part arrives, it’s ready for immediate installation without the need for expensive dealer tools or software. The programming includes the latest GM updates to ensure optimal performance and reliability, resolving common software-related DTCs right out of the box. Installation is straightforward, typically taking less than 15 minutes with basic hand tools. Simply locate the module under the steering column, disconnect the battery, swap the part, and reconnect. There’s no core charge, so you can keep your old part without any hassle.
Post-Installation Notes: In some cases, particularly if your airbag light was on, a professional scan tool may be needed to perform the “Setup SDM Primary Key in BCM” procedure to sync the new module with the airbag system. A brake pedal position sensor relearn may also be required on certain models. Always consult a service manual for vehicle-specific instructions.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique Vehicle Identification Number (VIN) and all associated factory settings onto the module before we ship it. This makes it a true plug-and-play part, eliminating the need for dealership programming.
Is this BCM difficult to install myself?
No, for most DIYers, this is a simple job. The BCM is typically located under the driver’s side dash near the steering column. It’s held in by a few clips or bolts and has several electrical connectors. The entire swap usually takes less than 15 minutes.
Will this fix my airbag light with code B1001?
A faulty BCM is a very common cause of the B1001 code. Replacing it with our programmed module will resolve the root cause. However, you may need a scan tool with SRS capabilities to perform the ‘Setup SDM Primary Key’ procedure to clear the light after installation.
What if this doesn’t fix my problem?
We stand behind our parts with a one-year warranty. If you’ve correctly diagnosed the BCM as the issue, this part will resolve it. If you’re unsure, we recommend consulting with a qualified technician to confirm the diagnosis before ordering.
Is this compatible with my 2004 GMC Yukon?
Yes, this BCM fits a wide range of 2002-2007 GM trucks and SUVs, including the GMC Yukon, Sierra, Chevrolet Tahoe, Suburban, Avalanche, Cadillac Escalade, and Hummer H2. Please check the detailed fitment list on this page to confirm compatibility.