Are you battling strange and frustrating electrical problems in your GM truck or SUV? Intermittent power windows, a malfunctioning HVAC system, or random warning lights are classic signs of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it falters, it can cause a cascade of confusing issues. This OEM-quality GM 15116066 BCM is the definitive solution, pre-programmed to your vehicle’s VIN for a true plug-and-play repair that restores full functionality and peace of mind.
From the Diagnostic Bay
We had a 2005 Silverado 2500 in the shop that was a real head-scratcher. The owner reported the radio would turn off, the dome light would flicker, and the power locks worked only when they wanted to. He’d already replaced the battery and checked the grounds. After hooking up the scanner, we saw a dozen communication codes pointing in different directions. Instead of chasing electrical gremlins for hours, we went straight to the most likely culprit: the BCM. After installing a VIN-programmed unit like this one, every single issue vanished. It’s a perfect example of how one component can solve a multitude of problems.
Common Symptoms of a Failing GM BCM
- ✔ Unresponsive or erratic power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that won’t turn on or off, or flicker randomly.
- ✔ HVAC controls not working, or the blower motor operating intermittently.
- ✔ An active airbag warning light, often accompanied by DTC B1001.
- ✔ Security system faults, leading to no-start or crank-no-start conditions.
- ✔ A flood of seemingly unrelated Diagnostic Trouble Codes (DTCs) stored in the vehicle’s memory.
Diagnosing and Replacing Your 2003-2007 Silverado BCM
Replacing the BCM is a straightforward job that can be done with basic tools in your own garage. This module is typically located under the driver’s side dashboard, near the steering column. Simply disconnect the vehicle’s battery, remove the old module, plug this new one in, and reconnect the battery. Because we program it with the latest GM software using your VIN, you can skip the expensive trip to the dealership for programming. In most cases, the vehicle will start and run perfectly. However, for some models, a couple of simple post-installation relearn procedures may be needed.
- Airbag System Sync: If the airbag light remains on after installation, a technician will need to perform a ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool.
- Brake Pedal Position Relearn: Some vehicles may require a brake pedal position sensor recalibration to ensure proper brake light and stability control function.
This part is a direct replacement for multiple part numbers, including: 10383536, 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 on a Silverado?
The BCM acts as the brain for your truck’s non-engine related electronics. It controls functions like power windows, locks, interior and exterior lighting, wipers, the security system, and the HVAC system.
Is this BCM truly plug-and-play?
Yes, it is. We pre-program the module to your vehicle’s specific VIN before shipping. This ensures it communicates correctly with your truck’s other systems right out of the box, eliminating the need for dealership programming.
Where is the BCM located on my 2004 GMC Sierra or Chevy Silverado?
On most 2003-2007 GM trucks and SUVs like the Silverado, Sierra, Tahoe, and Yukon, the BCM is located under the driver’s side of the dashboard, typically to the left of the steering column.
What if my airbag light is on after installation?
This is uncommon, but if it happens, it means the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure 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 without any extra fees or hassle.