If you’re dealing with bizarre electrical issues in your GM truck—like headlights with a mind of their own, power windows that won’t budge, or a security light that prevents your engine from starting—you’re not alone. After 20 years of diagnosing these exact vehicles, I’ve seen countless times how a failing Body Control Module (BCM) can cause some of the most frustrating problems for owners. It’s the central command for your truck’s body electronics, and when it goes, it takes convenience and reliability with it.
This isn’t just a replacement part; it’s a permanent solution. We offer this high-quality Body Control Module, equivalent to OEM part number 15137394, fully pre-programmed to your truck’s specific Vehicle Identification Number (VIN). This means you can skip the expensive trip to the dealership for programming. It arrives at your door ready for a true plug-and-play installation, restoring full functionality and getting your truck back to dependable working order.
From the Diagnostic Bay: The Case of the Haunted Sierra
A customer brought in his ’05 Sierra 2500 with a list of complaints that sounded like the truck was possessed. The dome light would flicker, the radio would cut out, and sometimes it just wouldn’t start, with the security light flashing on the dash. He’d already replaced the battery and checked the grounds. After hooking up my scanner, I saw a slew of communication DTCs pointing to the BCM. Instead of a costly diagnostic rabbit hole, we installed one of our VIN-programmed modules. In under 10 minutes, every single issue was resolved. It’s a textbook example of how a failing BCM creates widespread, confusing symptoms, and how the right part makes for a quick, effective repair.
Is Your GM Truck Showing These Electrical Symptoms?
A faulty BCM can manifest in numerous ways. Here are the most common signs I’ve seen in my shop that point directly to a failing module:
- ✔ Intermittent or non-working power windows, door locks, or interior lights.
- ✔ HVAC blower motor or climate controls operating erratically or not at all.
- ✔ The security or anti-theft system malfunctioning, causing a no-start condition.
- ✔ An airbag warning light on the dash, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Headlights, taillights, or turn signals not working correctly.
- ✔ Unexplained battery drain or strange communication codes stored in the system.
A Straightforward Guide to BCM Installation
One of the best features of this module is its simple installation. For most DIYers, this is a job you can complete in your driveway in less than 15 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s systems.
- Locate the BCM: On most 2003-2007 Sierra, Silverado, and other GM trucks/SUVs, the BCM is located under the driver’s side of the dashboard, near the steering column.
- Remove the Old Module: Carefully unplug the electrical connectors from the old BCM. They have release tabs that need to be pressed. Once unplugged, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Connect the electrical harnesses to your new, pre-programmed BCM. The plugs are color-coded and keyed to only fit one way. Secure the new module back into the mounting bracket.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair.
- Post-Installation Checks: In some cases, an airbag light may remain on. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. Similarly, a brake pedal position relearn may be needed. These are not always required but are good to be aware of.
Verified Vehicle Compatibility List
This BCM is a direct-fit replacement for a wide range of General Motors trucks and SUVs. It is interchangeable with part numbers 10383536, 15116066, 15136225, 15136877, 15137393, 15137395, 15137396, 15198116, 15257043, and more. Please verify your model and options below:
- GMC Sierra 1500/2500/3500/Denali (2003-2007 Classic)
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- GMC Yukon / Yukon XL (2003-2006)
- Chevrolet Tahoe / Suburban (2003-2006)
- Chevrolet Avalanche 1500/2500 (2003-2006)
- Cadillac Escalade / ESV / EXT (2003-2006)
- Hummer H2 (2003-2007)
- GMC Savana & Chevrolet Express Vans (2004-2007, w/ opt PRP)
This module is specifically for Crew Cab models in many truck applications. Please check the detailed fitment list from the original product page or contact us with your VIN to ensure 100% compatibility.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you time and money on dealer programming fees.
Is there a core charge for my old part?
Absolutely not. There is no core charge, so you can keep your old module without any hassle or need to return it.
What tools do I need for the installation?
For most models, you’ll only need a basic socket set or nut driver to remove the old module. No special tools are required for the physical installation. A professional scan tool may be needed for post-install procedures like an airbag light reset, but this is not always necessary.
Why is my airbag light still on after installing the new BCM?
This can happen because the new BCM needs to be electronically ‘shaken hands’ with the airbag’s Sensing and Diagnostic Module (SDM). A technician with a capable scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the two modules and turn off the light.
Will this part fix a no-start issue?
Yes, if the no-start is caused by the factory anti-theft or security system (Passlock/VATS) being controlled by a faulty BCM. Our VIN programming ensures the security data matches your keys, allowing the vehicle to start.