Fix Your Truck’s Electrical Issues with a Reliable Body Control Module
If you’re chasing down frustrating electrical problems in your 2003-2007 GMC Sierra 3500, the Body Control Module (BCM) is often the culprit. As the central command for your truck’s body electronics, a failing BCM can cause a cascade of baffling issues. This replacement module, part number 15137393, is the definitive solution. We offer a professional Cloning Service, where we transfer the precise data from your original BCM to this replacement unit. The result is a true plug-and-play part that restores full functionality without requiring a trip to the dealership for expensive programming.
A Technician’s Notebook: The Intermittent Fault Fiasco
I once had a 2005 Silverado 2500HD in the shop with the most erratic symptoms—the radio would cut out on bumpy roads, the driver’s side window would work one day but not the next, and the security light would randomly flash, preventing a start. The owner had replaced the battery and checked all the fuses. After ruling out wiring issues, we traced it back to a failing BCM. The internal solder joints had developed micro-cracks over the years. Swapping in a cloned BCM solved every single issue instantly. It’s a classic failure on these GMT800 platform trucks.
Common Signs of a Failing GM BCM
A faulty BCM can manifest in numerous ways. If your truck is experiencing any of the following, it’s time to consider a replacement. Over my years in diagnostics, these are the most frequent complaints that point directly to a bad Sierra 3500 Body Control Module.
- ✔ Your power windows, door locks, or interior lights operate intermittently or not at all.
- ✔ The HVAC system is unresponsive, or the blower motor works sporadically.
- ✔ An airbag warning light is illuminated on the dash, often accompanied by DTC B1001 (Option Configuration Error).
- ✔ The anti-theft or security system malfunctions, causing no-start conditions.
- ✔ Headlights, taillights, or wipers behave erratically, creating a serious safety hazard.
- ✔ You’re seeing a variety of communication or body-related Diagnostic Trouble Codes (DTCs).
A Straightforward Guide to BCM Installation
Getting your truck back to normal is easier than you think. This is a job most DIYers can handle in their driveway in about 5-10 minutes. Our Cloning Service makes the electronic side of things simple, so you can focus on the physical swap.
- Step 1: Disconnect the Power. Always start by disconnecting the negative terminal on your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s electronic systems.
- Step 2: Locate the BCM. On most Sierra and Silverado trucks, the BCM is located under the driver’s side dashboard, to the left of the steering column. It’s a black plastic box with several large electrical connectors.
- Step 3: Swap the Modules. Carefully unplug the wiring harnesses from your old BCM. They have release tabs that need to be pressed. Once disconnected, remove the old module and install the new one in its place. Reconnect the harnesses securely.
- Step 4: Reconnect and Test. Reconnect the negative battery terminal. Start the truck and test all body functions—windows, locks, lights, wipers, and HVAC—to confirm the repair was successful.
Guaranteed Fitment for Your GM Truck or SUV
This BCM is a direct replacement for part number 15137393 and is compatible with a wide range of General Motors vehicles. It also interchanges with part numbers 15116066, 15198116, 15136877, and others. Please verify your part number before ordering to ensure compatibility. This module fits the following models:
CHEVROLET SILVERADO 1500/2500/3500 (2003-2007 Classic)
CHEVROLET SUBURBAN 1500/2500 (2003-2006)
CHEVROLET TAHOE (2003-2006)
CHEVROLET EXPRESS 1500/2500/3500 VAN (2004-2007, w/ opt PRP)
GMC SIERRA 1500/2500/3500 PICKUP (2003-2007 Classic)
GMC YUKON & YUKON XL 1500/2500 (2003-2006)
GMC SAVANA 1500/2500/3500 VAN (2004-2007, w/ opt PRP)
CADILLAC ESCALADE, ESV, EXT (2003-2006)
HUMMER H2 (2003-2007)
Frequently Asked Questions
Frequently Asked Questions
How does the Cloning Service work?
You send us your original Body Control Module. We then extract its unique programming and vehicle-specific data and flash it onto the replacement unit. This ensures it works perfectly with your truck’s existing keys, security system, and options without any additional programming.
Do I need to send my original BCM to you?
Yes, for the cloning service to be successful, we require your original module to read the data from it. We will return your original module along with the newly programmed replacement.
What is the ‘Setup SDM Primary Key in BCM’ procedure?
This is a post-installation procedure that may be required if your airbag light is on after installing the new BCM. It syncs the BCM with the airbag system’s Sensing and Diagnostic Module (SDM). This procedure requires a bi-directional scan tool and is typically only necessary if there was an airbag-related fault code stored previously.
Will I need to perform a brake pedal position relearn?
On some models, yes. If your brake lights or traction control system are not functioning correctly after the swap, a brake pedal position sensor relearn may be necessary. This also requires a compatible professional scan tool.
Is there a core charge for this part?
No, there is no core charge. We return your original module with the order, so you don’t have to worry about core returns or fees.
Why choose this over a new BCM from the dealer?
Our solution saves you significant time and money. A dealership will sell you a blank module that requires expensive, on-vehicle programming. Our cloned Sierra 3500 Body Control Module arrives ready for immediate installation, eliminating that extra step and cost.