Restore Full Command Over Your Truck’s Electronics
If you’re battling bizarre electrical issues in your GMC Sierra or other GM truck—like wipers with a mind of their own, flickering lights, or a dead instrument cluster—the Body Control Module (BCM) is the likely culprit. As the central nervous system for your vehicle’s comfort and security features, a failing BCM can turn a reliable workhorse into a source of constant frustration. This direct-fit Body Control Module, equivalent to part number 15137395, arrives pre-programmed to your truck’s specific VIN, eliminating the need for expensive dealership visits and getting you back on the road with confidence.
Is Your Sierra Exhibiting These Electrical Gremlins?
A faulty BCM can manifest in numerous ways. From my 20+ years of experience, these are the tell-tale signs I see most often in the shop. If your truck is showing these symptoms, a new module is the most effective solution.
- ✔ The HVAC system is unresponsive, or the blower motor works only intermittently.
- ✔ Power windows, door locks, or interior/exterior lights fail to operate or act erratically.
- ✔ The security system malfunctions, causing a no-start condition or the alarm to go off randomly.
- ✔ An airbag warning light is illuminated on the dash, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ You’re chasing persistent communication errors or grounding faults that never seem to resolve.
Case Study: The Ghost in the Machine
A customer brought in his ’06 Silverado 2500, convinced it had a major wiring short. The radio would cut out, the dome light would flash, and occasionally the power locks would cycle while driving. He’d spent a weekend checking grounds with no luck. After connecting my scanner, I saw a handful of U-codes (communication errors) pointing to the BCM. Instead of hours chasing wires, we installed a VIN-programmed module. The entire job took less than 10 minutes, and every single electrical ghost was gone. This is a classic failure pattern for the 2003-2007 Sierra 3500 BCM and its sister vehicles.
Your 5-Minute Path to a Fully Functional Truck
One of the best features of this module is its simple, DIY-friendly installation. No complex wiring, no special tools needed. Just follow these steps:
- Safety First: Disconnect the negative terminal on your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Old BCM: On most GM trucks and SUVs of this era, you’ll find the BCM under the driver’s side dashboard, just to the left of the steering column. It’s a black box with several large multi-pin connectors.
- Swap the Module: Carefully unplug the wiring harnesses from the old module. They have locking tabs, so be gentle. Remove the old BCM and secure the new one in its place.
- Connect and Power Up: Plug the wiring harnesses firmly into your new module. Reconnect the battery terminal. Start the vehicle and test all functions—lights, wipers, locks, windows, and HVAC.
With our pre-programming service, your truck’s essential functions are restored immediately. For specific situations like a lingering airbag light, a professional scan tool may be needed for an ‘SDM Key Relearn’ procedure, but for most owners, this is a true plug-and-play fix.
Verified to Fit These GM Trucks, Vans & SUVs
This module is a direct replacement for a wide range of General Motors vehicles. Please verify your model and year below. This is the correct solution for a failing 2003-2007 Sierra 3500 BCM.
CHEVROLET SILVERADO 1500/2500/3500 (2003-2007 Classic)
CHEVROLET SUBURBAN 1500/2500 (2003-2006)
CHEVROLET TAHOE (2003-2006)
CHEVROLET EXPRESS VAN 1500/2500/3500 (2004-2007)
GMC SIERRA 1500/2500/3500 & DENALI (2003-2007 Classic)
GMC YUKON & YUKON XL 1500/2500 (2003-2006)
GMC SAVANA VAN 1500/2500/3500 (2004-2007)
CADILLAC ESCALADE, ESV, EXT (2003-2006)
HUMMER H2 (2003-2007)
This part is interchangeable with part numbers: 10383536, 15116066, 15136225, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, 15194170.
Frequently Asked Questions
Is this part really plug-and-play?
Yes. We program the module to your vehicle’s VIN before shipping. This ensures it communicates correctly with your truck’s other systems right out of the box, saving you a trip to the dealership.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep or dispose of your old module without any hassle.
What if my airbag light is on after I install it?
In some cases, the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that can be performed by a mechanic with a professional-grade diagnostic tool.
Will this fix my ‘Service 4WD’ message?
While the BCM can cause a wide array of issues, the ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM) or the encoder motor. It’s important to diagnose the specific codes before ordering parts.
What is your warranty policy?
We stand behind our products with a one-year warranty, ensuring you receive a reliable and durable part for your vehicle.