Are you chasing down frustrating electrical gremlins in your truck? One minute the power windows work, the next they don’t. The A/C blower motor has a mind of its own, and a mysterious warning light keeps popping up on the dash. In my 20+ years of diagnostics, these phantom issues in GM trucks and SUVs often point to one culprit: a failing Body Control Module (BCM). This isn’t just an inconvenience; it can affect your vehicle’s security and safety systems.
This OEM-quality Body Control Module, part number 15198116, is the definitive solution. It serves as the central hub for your vehicle’s body electronics, managing everything from interior lights and door locks to the HVAC system and security features. We take the hassle out of the repair by pre-programming this module to your vehicle’s specific VIN. This means no expensive trip to the dealership for programming—it arrives ready for a true plug-and-play installation, getting your workhorse back to full operational status quickly and reliably.
A Technician’s Notebook
I once had a 2005 Sierra 2500 in the bay with a textbook case of BCM failure. The owner had spent hundreds chasing what he thought was a parasitic battery drain and a bad ground. The radio would stay on, the dome lights would flicker, and the battery was dead every other morning. After checking the usual suspects, we hooked up the scanner and saw a slew of communication DTCs. A new, properly programmed BCM solved every single issue in under an hour. It’s a powerful reminder that what looks like multiple separate problems is often a single point of failure in the BCM.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Intermittent HVAC blower motor operation or climate controls that don’t respond.
- ✔ The security system light is on, or the truck experiences a no-start condition.
- ✔ An airbag warning light is illuminated, often with a DTC like B1001 (Option Configuration Error).
- ✔ Interior or exterior lights (headlights, brake lights) behaving unpredictably.
- ✔ Wipers activating on their own or not working at all.
A Straightforward Guide to BCM Installation
Replacing the 2003-2007 Silverado 3500 BCM is a job most DIYers can handle in minutes. The module is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal on your truck’s battery before starting work. This prevents electrical shorts and helps reset the system.
- Locate the BCM: On most Silverado and Sierra models, you’ll find it mounted to a bracket under the steering column. It’s a black plastic box with several large multi-pin connectors.
- Swap the Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Unbolt the old module from its bracket and mount the new one in its place.
- Reconnect and Test: Securely plug all connectors into your new, VIN-programmed BCM. Reconnect the battery terminal. Start the vehicle and test all functions: lights, windows, locks, wipers, and HVAC to confirm the repair.
- Post-Install Checks: In some cases, a ‘Setup SDM Primary Key in BCM’ procedure may be needed with a scan tool if the airbag light remains on. See our FAQ for more details.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 15198116 and interchanges with 10383536, 15116066, 15136225, 15136877, 15137393, and more. It is guaranteed to fit the following models, among others:
- Chevrolet Silverado/GMC Sierra 1500, 2500, 3500 (2003-2007 Classic)
- Chevrolet Tahoe / Suburban (2003-2006)
- GMC Yukon / Yukon XL (2003-2006)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
- Chevrolet Express / GMC Savana Van (2004-2007)
This is the reliable, long-term fix for your vehicle’s body electronic issues. By choosing our pre-programmed 2003-2007 Silverado 3500 BCM, you’re not just buying a part; you’re buying a hassle-free solution backed by expert support and a one-year warranty.
Frequently Asked Questions
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you time and the high cost of dealership programming.
What is a core charge?
A core charge is a deposit you pay until you return your old part. We have a ‘No Core Charge’ policy, so you can keep your old module without any extra fees or hassle.
My airbag light is on. Will this fix it?
A faulty BCM can cause the airbag light to come on with a code like B1001. While this module will fix the root cause, the airbag system (SDM) may need to be synced to the new BCM using a professional scan tool after installation to clear the light.
Where is the BCM located on my 2004 Silverado?
On most 2003-2007 GM trucks and full-size SUVs, the Body Control Module is located under the driver-side dashboard, to the left of the steering column.
What tools do I need for installation?
Installation is very simple and typically only requires basic hand tools, such as a socket or wrench (commonly 7mm or 10mm) to remove the mounting bolts. No special tools are needed for the swap itself.
Will this fix my brake lights not working?
The BCM plays a role in brake light operation. If the issue is electronic, this module can resolve it. However, some models may require a Brake Pedal Position Relearn procedure with a scan tool after installation to ensure proper function.