Fix Persistent Electrical Problems in Your GM Truck or SUV
Is your 2003-2007 GMC Sierra, Chevrolet Silverado, or other GM vehicle experiencing bizarre electrical issues? Flickering lights, unresponsive power windows, a malfunctioning security system, or an illuminated airbag light can often be traced back to a single component: a failing Body Control Module (BCM). The BCM is the electronic brain for your vehicle’s body accessories, and when it fails, it can cause a wide range of frustrating problems. This OEM-quality BCM, part number 15136877, is the direct-fit, reliable solution to restore full functionality to your vehicle.
Common Symptoms of a Failing 2003-2007 Sierra 2500 BCM
A faulty BCM can manifest in numerous ways. If you’re noticing any of the following issues, your Body Control Module is the most likely cause:
- ✔ Non-functional or erratic power windows, door locks, or interior/exterior lighting.
- ✔ HVAC controls not working or the blower motor behaving unpredictably.
- ✔ The security system acting up, causing a no-start condition or false alarms.
- ✔ An active airbag warning light, often accompanied by diagnostic trouble code B1001.
- ✔ Intermittent operation of windshield wipers.
- ✔ Multiple communication error codes stored in the vehicle’s computer system.
The Plug-and-Play Solution: VIN Programmed for Your Truck
The biggest hurdle in replacing a BCM is the need for expensive dealership programming. We eliminate that step entirely. This module is expertly programmed to your vehicle’s specific VIN before it ships, ensuring it works seamlessly with your existing systems right out of the box. It arrives loaded with the latest GM software updates for optimal performance and reliability. This means no extra tools, no trip to the mechanic, and no hidden fees—just a straightforward installation that you can do yourself in minutes.
This module is a direct replacement for a wide range of part numbers, including 15116066, 15136225, 15198116, and more, making it a versatile fix for many GM trucks and SUVs from this era, including the Tahoe, Suburban, Yukon, and Escalade.
Installation and Post-Install Notes
Installation is simple. The BCM is typically located under the driver’s side dashboard, near the steering column. Disconnecting the battery before you begin is recommended. While the module is plug-and-play, some vehicles may require a ‘Setup SDM Primary Key in BCM’ procedure using a professional scan tool if the airbag light remains on after installation. This syncs the new BCM with the airbag system. Additionally, a brake pedal position sensor relearn might be needed on certain models. Best of all, there is no core charge, so you don’t have to worry about the hassle and expense of sending your old part back.
Frequently Asked Questions
What does a Body Control Module (BCM) actually do?
The BCM acts as a central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, the security system, and HVAC controls.
Is this module truly ready to install out of the box?
Yes. We program the module with your vehicle’s VIN before shipping. This ensures it communicates correctly with your truck’s other systems, eliminating the need for dealership programming.
What if my airbag light is on after I install the new BCM?
If the airbag light is on, it means the new BCM needs to be synchronized with the existing airbag system (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be performed by a technician with a professional-grade diagnostic tool.
Do I need to send my old, broken BCM back?
No. There is no core charge or requirement to return your original module. You can keep it or dispose of it at your convenience.
Where is the BCM located on my 2004 GMC Sierra?
On most 2003-2007 GM trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, typically to the left of the steering column.
Will this part fit vehicles other than the Sierra 2500?
Yes, this BCM is compatible with a wide range of 2002-2007 GM vehicles, including the Chevrolet Silverado, Tahoe, Suburban, Avalanche, and GMC Yukon models. Please check the fitment list to confirm for your specific vehicle.